/* ==========================================================================
   CAESTUDY WEBSITE STYLES
   
   A modular CSS architecture for the cæstudy website.
   Inspired by mid-century modernist design and technical drawings.
   
   TABLE OF CONTENTS:
   1. CSS Reset & Base Styles
   2. Typography
   3. Color Variables & Design System  
   4. Layout & Grid Systems
   5. Parallax Effects
   6. Components
   7. Sections
   8. Responsive Design
   9. Utilities
   ========================================================================== */

/* ==========================================================================
   1. CSS RESET & BASE STYLES
   ========================================================================== */

/* Universal reset for consistent baseline */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


/* Root styles and custom properties */
:root {
    /* Typography Scale */
    --font-primary: 'TASA Orbiter Text', 'TASA Orbiter Display', 'Inter', sans-serif;
    --font-brand: 'Poppins', -apple-system, sans-serif;
    --font-mono: 'Geist Mono', monospace;
    --font-draftsman: 'Architects Daughter', cursive;
    
    /* === BRAND COLOR PALETTE === */
    
    /* Primary Brand Colors */
    --color-brand-primary: #2563eb;        /* Main brand blue */
    --color-brand-secondary: #1e40af;      /* Deep brand blue */
    --color-brand-tertiary: #1e3a8a;       /* Darker brand blue */
    --color-brand-light: #dbeafe;          /* Light blue background for published status */
    --nav-brand-current: #2563eb;          /* Dynamic brand color for shared elements */
    --color-card-header-default: #d3e3ef;  /* Light blue default for card headers */
    --color-card-header-accent: #608790;   /* Muted blue-gray accent for card headers */
    --color-about-header-default: #5f8f7d; /* Lighter verdant tone for about header */
    --color-about-header-hover: #2f514d;   /* Deep teal hover tone for about header */
    --size-about-header-brand: 4.5rem;     /* Width of brand segment in about cards */
    
    /* Text Colors */
    --color-text-primary: #333333;         /* Primary text (near black) */
    --color-text-secondary: #64748b;       /* Secondary text (slate-500) */
    --color-text-tertiary: #6b7280;        /* Tertiary text (gray-500) */
    
    /* Status & Semantic Colors */
    --color-success: #10b981;              /* Success green (emerald-500) */
    --color-success-dark: #065f46;         /* Success dark (emerald-800) */
    --color-success-light: #d1fae5;        /* Success light (emerald-100) */
    --color-warning: #f59e0b;              /* Warning amber */
    --color-warning-light: #fbbf24;        /* Warning light (amber-400) */
    --color-info: #3b82f6;                 /* Info blue */
    --color-accent: #7c3aed;               /* Accent purple (violet-600) */
    --color-accent-light: #8b5cf6;         /* Accent light (violet-500) */
    --color-accent-dark: #5b21b6;          /* Accent dark (violet-800) */
    
    /* Background Colors */
    --color-bg-primary: #ffffff;           /* Primary background (white) */
    --color-bg-secondary: #f8fafc;         /* Secondary background (slate-50) */
    --color-bg-tertiary: #f1f3f4;          /* Tertiary background (gray-50) */
    --color-bg-quaternary: #f8f9fa;        /* Quaternary background (light gray) */
    --color-bg-brand-light: #f0f9ff;       /* Light brand background (blue-50) */
    --color-bg-accent-light: #faf5ff;      /* Light accent background (violet-50) */
    --color-bg-neutral: #f1f5f9;           /* Neutral background (slate-100) */
    
    /* Border & Line Colors */
    --color-border-light: #e5e7eb;         /* Light border (gray-200) */
    --color-border-medium: #d1d5db;        /* Medium border (gray-300) */
    --color-border-dark: rgba(0, 0, 0, 0.1); /* Dark border (transparent black) */
    
    /* Gray Scale Palette */
    --color-gray-100: #f3f4f6;             /* Very light gray */
    --color-gray-400: #9ca3af;             /* Light gray */
    --color-gray-500: #6b7280;             /* Medium gray */
    --color-gray-600: #4b5563;             /* Medium-dark gray */
    --color-gray-700: #374151;             /* Dark gray */
    --color-gray-900: #1f2937;             /* Very dark gray */
    
    /* Slate Scale Palette */
    --color-slate-500: #64748b;            /* Medium slate */
    --color-slate-600: #475569;            /* Medium-dark slate */
    --color-slate-700: #334155;            /* Dark slate */
    --color-slate-800: #1e293b;            /* Very dark slate */
    
    /* Spacing Scale */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Grid Patterns */
    --grid-pattern-subtle: linear-gradient(rgba(0, 0, 0, 0.05) 2px, transparent 2px),
                          linear-gradient(90deg, rgba(0, 0, 0, 0.05) 2px, transparent 2px);
    --grid-pattern-brand: linear-gradient(rgba(30, 58, 138, 0.08) 2px, transparent 2px),
                         linear-gradient(90deg, rgba(30, 58, 138, 0.08) 2px, transparent 2px);
    --grid-size-sm: 10px 10px;
    --grid-size-md: 16px 16px;
    --grid-size-lg: 20px 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.6s ease;

    /* Layout Metrics */
    --header-height: 80px;
    
    /* Shadows */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.1);
}

/* Base HTML and body styles */
html {
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
}

/* ==========================================================================
   2. TYPOGRAPHY
   ========================================================================== */

/* Brand typography for logos and main headings */
.brand-text {
    font-family: var(--font-brand);
    font-weight: 400;
    color: var(--color-brand-primary);
}

/* Section titles - consistent across all pages */
.section-title {
    font-family: var(--font-brand);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-xl);
    color: var(--color-slate-800);
    text-align: center;
}

/* Technical text styling for code/monospace elements */
.technical-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--color-text-tertiary);
}

/* ==========================================================================
   3. LAYOUT & GRID SYSTEMS
   ========================================================================== */

/* Main container for content width and centering */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Grid backgrounds for visual consistency */
.grid-background {
    background-image: var(--grid-pattern-subtle);
    background-size: var(--grid-size-sm);
}

.grid-background--brand {
    background-image: var(--grid-pattern-brand);
    background-size: var(--grid-size-sm);
}




/* ==========================================================================
   6. COMPONENTS
   ========================================================================== */

/* Header Component */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border-dark);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.header.visible {
    opacity: 1;
}

/* Force header visibility on non-hero pages */
body:not(:has(.hero)) .header {
    opacity: 1 !important;
}

/* Navigation Component */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.nav-logo {
    height: 2.5rem;
    width: auto;
    object-fit: contain;
}

.brand-link h1 {
    font-family: var(--font-brand);
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-brand-primary);
    transition: color var(--transition-fast);
}

.brand-link:hover h1,
.brand-link:visited h1 {
    color: var(--color-brand-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 500;
    transition: color var(--transition-normal);
}

.nav-links a:hover {
    color: var(--color-brand-primary);
}

.cta-button {
    background: var(--color-brand-primary);
    color: white !important;
    padding: var(--space-xs) var(--space-md);
    border-radius: 25px;
    transition: all var(--transition-normal);
}

.cta-button:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    margin: 3px 0;
    transition: var(--transition-normal);
}

/* ==========================================================================
   5. SECTIONS
   ========================================================================== */

/* Hero Section */
.hero {
    min-height: 100vh;
    min-height: 100svh; /* Small viewport height for mobile */
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, black 0%, black 50%, var(--color-bg-tertiary) 100%);
    color: white;
    padding: var(--space-lg);
    position: relative;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: opacity 0.3s ease-in-out;
}

.hero-brand {
    font-family: var(--font-brand);
    font-size: clamp(4rem, 12vw, 12rem);
    font-weight: 100;
    margin: 0;
    line-height: 1;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    transition: opacity 0.3s ease-in-out;
    padding-top: 4vh;
    text-align: center;
    position: relative;
    -webkit-text-stroke: 1.0px green;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    z-index: 3;
}

.hero-logo {
    height: 1.2em;
    width: auto;
    object-fit: contain;
    margin-top: 0.12em;
}

.hero-title {
    font-family: var(--font-brand);
    font-size: 3.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--space-lg);
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
}

/* Button Component System */
.button {
    display: inline-block;
    padding: 0.75rem var(--space-lg);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    text-align: center;
}

.button.primary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.button.primary:hover {
    background: white;
    color: var(--color-brand-primary);
    transform: translateY(-2px);
}

.button.secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.button.secondary:hover {
    background: white;
    color: var(--color-brand-primary);
    transform: translateY(-2px);
}

.button.large {
    padding: var(--space-sm) var(--space-xl);
    font-size: 1.1rem;
}

/* Hero Buttons */
.hero-buttons .button {
    min-width: 200px;
    text-align: center;
}

/* Hero Visual Elements */
.hero-visual {
    display: flex;
    justify-content: center;
}

.hero-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: var(--space-lg);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    animation: float 3s ease-in-out infinite;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--space-sm);
}

.hero-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Features Section */
.features {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
    position: relative;
    z-index: 10;
}

.features.grid-background {
    background-image: var(--grid-pattern-subtle);
    background-size: var(--grid-size-sm);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

/* Feature Card Component */
.feature-card {
    background: var(--color-bg-primary);
    padding: 0;
    border-radius: 15px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    background-image: var(--grid-pattern-brand);
    background-size: var(--grid-size-sm);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.95) 100%);
    pointer-events: none;
    border-radius: 15px;
    z-index: 1;
    transition: background 0.6s ease;
}

.feature-card:hover::before {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.feature-card > * {
    position: relative;
    z-index: 2;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-card-header {
    position: relative;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: transparent;
    z-index: 3;
    display: flex;
    height: 2rem;
    overflow: hidden;
}

.header-brand {
    font-family: var(--font-brand);
    font-size: 0.8rem;
    font-weight: 400;
    color: rgba(30, 64, 175, 0.5);
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    background: rgba(248, 250, 252, 0.9);
}

.header-line {
    width: 1px;
    background: rgba(255, 255, 255, 0.25);
    height: 100%;
}

.header-id {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 400;
    color: #1e293b;
    padding: var(--space-xs);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    flex: 1;
    background: var(--color-card-header-default);
    transition: background var(--transition-normal), color var(--transition-normal);
}

.feature-card:hover .header-id,
.contact-form-card:hover .header-id {
    background: var(--color-card-header-accent);
    color: #e2e8f0;
}

.contact-form-card .header-id {
    background: #7f6253;
    color: #f1f5f9;
}

.contact-form-card:hover .header-id {
    background: #9b4e3d;
    color: #f9f5ea;
}

.feature-card-content {
    padding: var(--space-lg);
    text-align: left;
}

.feature-card h3 {
    font-family: var(--font-brand);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
    margin-top: 0;
    color: var(--color-slate-800);
}

.feature-text {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.feature-text div {
    margin-bottom: 0.75em;
}

.feature-text div:last-child {
    margin-bottom: 0;
}

/* About Section */
.about {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: var(--color-bg-primary);
    position: relative;
}

/* About Section - Parallax Background */
.about-bg {
    position: absolute;
    left: 0;
    width: 100%;
    background-size: auto 100%;
    background-repeat: no-repeat;
    background-position: left center;
    opacity: 0;
    pointer-events: none; /* Ensure background doesn't interfere with interactions */
}

.about-bg-primary {
    top: 0;
    height: 50%;
    background-image: url('/assets/casestudyhouse021_00_Med.png');
    z-index: 1;
}

.about-bg-secondary {
    top: 25%;
    height: 50%;
    background-image: url('/assets/casestudyhouse021_01_Med.png');
    z-index: 1.5;
}

.about-bg-tertiary {
    top: auto;
    bottom: 0;
    height: 33.333%;
    background-image: url('/assets/casestudyhouse021_02_Med.png');
    background-position: left bottom;
    z-index: 1.4;
}

.about .container {
    position: relative;
    z-index: 2; /* Above parallax background */
}

.about.grid-background {
    background-image: var(--grid-pattern-subtle);
    background-size: var(--grid-size-sm);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.about-text h2 {
    font-family: var(--font-brand);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-md);
    color: var(--color-slate-800);
}

.about-text p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

/* Statistics Component */
.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.stat {
    text-align: center;
    padding: var(--space-md);
    padding-top: calc(var(--space-md) + 2.1rem);
    background: var(--color-bg-primary);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 150px;
    border: 1px solid var(--color-border-light);
    position: relative;
    overflow: hidden;
    isolation: isolate;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stat:focus-visible {
    outline: 2px solid rgba(18, 50, 39, 0.4);
    outline-offset: 4px;
}

.stat-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2rem;
    display: flex;
    align-items: center;
    overflow: hidden;
    border-radius: 10px 10px 0 0;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: transparent;
    pointer-events: none;
    z-index: 2;
}

.stat-header-brand {
    width: var(--size-about-header-brand);
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 var(--space-xs);
    font-family: var(--font-brand);
    font-size: 0.8rem;
    font-weight: 400;
    background: rgba(248, 250, 252, 0.9);
    color: rgba(30, 64, 175, 0.45);
}

.stat-header-divider {
    width: 1px;
    height: 100%;
    background: rgba(255, 255, 255, 0.4);
}

.stat-header-title {
    flex: 1;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
    color: #123227;
    background: var(--color-about-header-default);
    transition: background var(--transition-normal), color var(--transition-normal);
}

.stat:hover .stat-header-title,
.stat.stat--active .stat-header-title {
    background: var(--color-about-header-hover);
    color: #ecf3e1;
}

.stat-body {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
    transform: translateY(0);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.stat:hover .stat-body,
.stat.stat--active .stat-body {
    transform: translateY(-1.6rem);
}

.stat-background-list {
    position: absolute;
    top: calc(2.45rem + 0.15rem);
    bottom: 0.6rem;
    left: var(--space-md);
    right: var(--space-md);
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
    transition: opacity var(--transition-normal);
    mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 15%,
        rgba(0, 0, 0, 0.6) 55%,
        black 100%
    );
    -webkit-mask-image: linear-gradient(
        to bottom,
        transparent 0%,
        transparent 15%,
        rgba(0, 0, 0, 0.6) 55%,
        black 100%
    );
}

.stat-background-list::before {
    display: none;
}

.stat-background-list-inner {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    animation: statBackgroundScroll 14s linear infinite;
    animation-play-state: running;
}

.stat-background-list ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.stat-background-list li {
    font-family: var(--font-mono);
    font-size: 0.73rem;
    letter-spacing: 0.045em;
    text-transform: uppercase;
    color: rgba(18, 50, 39, 0.42);
    text-align: right;
}

.stat-background-list {
    opacity: 0.72;
}


.stat h3 {
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--color-brand-primary);
    margin: 10px 0 0;
    position: relative;
    z-index: 2;
    transform: translateY(0);
    transition: transform var(--transition-normal);
}

.stat h3.infinity {
    font-size: 3.75rem;
    line-height: 1;
    margin: 10px 0 0;
    position: relative;
    z-index: 2;
    transform: translateY(0);
    transition: transform var(--transition-normal);
}

.stat p {
    color: var(--color-text-secondary);
    font-weight: 400;
    position: relative;
    z-index: 2;
    margin: 0.2rem 0 0;
    line-height: 1.1;
    transform: translateY(0);
    transition: transform var(--transition-normal);
}

.stat:hover .stat-body h3,
.stat.stat--active .stat-body h3 {
    transform: translateY(-0.35rem);
}

.stat:hover .stat-body p,
.stat.stat--active .stat-body p {
    transform: translateY(-1.1rem);
}

@keyframes statBackgroundScroll {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-50%);
    }
}

/* Call-to-Action Section */
.cta {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: var(--nav-brand-current);
    color: white;
    text-align: center;
    position: relative;
    z-index: 10;
    transition: background var(--transition-normal);
}

.cta.grid-background {
    background-image: var(--grid-pattern-subtle);
    background-size: var(--grid-size-sm);
}

.cta h2 {
    font-family: var(--font-brand);
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-sm);
}

.cta p {
    font-size: 1.2rem;
    margin-bottom: var(--space-lg);
    opacity: 0.9;
}

.cta-secondary-text {
    margin-top: var(--space-md);
    margin-bottom: 0;
    font-size: 0.9rem;
    opacity: 0.7;
}

.cta-secondary-link {
    color: inherit;
    text-decoration: none;
    transition: all 0.2s ease;
    cursor: pointer;
}

.cta-secondary-link:hover {
    opacity: 1;
    text-decoration: none;
    transform: translateY(-1px);
    text-shadow: 0 2px 8px rgba(255, 255, 255, 0.3);
}

/* Contact Section */
.contact {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
    position: relative;
    z-index: 10;
}

.contact.grid-background {
    background-image: var(--grid-pattern-subtle);
    background-size: var(--grid-size-sm);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-slate-800);
    margin-bottom: var(--space-sm);
}

.contact-info p {
    color: var(--color-text-tertiary);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.contact-details {
    margin-top: var(--space-xs);
}

.contact-details p {
    color: var(--color-gray-700);
    margin-bottom: var(--space-xs);
}

/* Contact Form Component */
.contact-form-card {
    background: var(--color-bg-primary);
    padding: 0;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    background-image: var(--grid-pattern-brand);
    background-size: var(--grid-size-sm);
    overflow: hidden;
}

.contact-form-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.95) 100%);
    pointer-events: none;
    border-radius: 15px;
    z-index: 1;
    transition: background 0.6s ease;
}

.contact-form-card:hover::before {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.contact-form-card > * {
    position: relative;
    z-index: 2;
}

.contact-form-header {
    position: relative;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: rgba(248, 250, 252, 0.8);
    z-index: 3;
    display: flex;
    height: 2rem;
}

.contact-form {
    padding: var(--space-lg);
}

.form-fields-container {
    display: flex;
    align-items: stretch;
}

.form-labels {
    width: 180px;
    display: flex;
    flex-direction: column;
}

.field-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 400;
    color: rgba(30, 64, 175, 0.4);
    padding: var(--space-xs);
    display: flex;
    align-items: flex-start;
    justify-content: flex-end;
    text-align: right;
    margin-bottom: var(--space-md);
    height: 3.5rem;
    padding-top: 0.75rem;
}

.form-line {
    width: 1px;
    background: rgba(30, 64, 175, 0.2);
    align-self: stretch;
}

.form-inputs {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.field-input {
    padding: var(--space-xs);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: flex-start;
    height: 3.5rem;
}

.field-input:last-child {
    height: auto;
}

.field-input input,
.field-input textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--color-border-light);
    border-radius: 4px;
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: border-color var(--transition-fast);
}

.field-input input:focus,
.field-input textarea:focus {
    outline: none;
    border-color: var(--color-brand-primary);
}

.field-input textarea {
    resize: vertical;
    min-height: 120px;
}

.privacy-notice {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.4);
    margin: var(--space-sm) 0 0 0;
    text-align: center;
}

.contact-form .button {
    width: 100%;
    margin-top: var(--space-sm);
    background: var(--color-gray-400);
    color: white;
    opacity: 0.6;
    transition: all var(--transition-normal);
}

.contact-form .button:hover {
    background: var(--color-brand-primary);
    color: white;
    opacity: 1;
    transform: translateY(-2px);
}

/* Footer Component */
.footer {
    background: var(--color-slate-800);
    color: white;
    padding: var(--space-2xl) 0 var(--space-lg);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
    background-size: var(--grid-size-lg);
    pointer-events: none;
    opacity: 0.6;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-lg);
}

.footer-brand h3 {
    font-family: var(--font-brand);
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: var(--space-xs);
}

.footer-brand p {
    opacity: 0.7;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.footer-column h4 {
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--space-xs);
}

.footer-column a {
    color: white;
    text-decoration: none;
    opacity: 0.7;
    transition: opacity var(--transition-normal);
}

.footer-column a:hover {
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

.footer-bottom p {
    font-family: var(--font-brand);
    font-weight: 400;
}

/* ==========================================================================
   6. PAGE-SPECIFIC STYLES
   ========================================================================== */

/* Case Studies Index */
.case-studies-index {
    padding-top: 80px;
}

.page-header {
    background: var(--color-bg-secondary);
    padding: var(--space-2xl) 0;
    text-align: center;
}

.page-title {
    font-family: var(--font-brand);
    font-size: 3rem;
    font-weight: 400;
    color: var(--color-slate-800);
    margin-bottom: var(--space-sm);
}

.page-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.case-studies-grid {
    padding: var(--space-3xl) 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    grid-auto-rows: 1fr;
    gap: var(--space-xl);
}

.studies-ellipsis {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 300;
    color: var(--color-slate-300);
    text-align: center;
    letter-spacing: 0.5em;
    opacity: 0.4;
    pointer-events: none;
    user-select: none;
}

.studies-ellipsis-top {
    margin-bottom: var(--space-xl);
}

.studies-ellipsis-bottom {
    margin-top: var(--space-xl);
}

/* Case Study Card Component */
.case-study-card {
    background: var(--color-bg-primary);
    padding: 0;
    border-radius: 15px;
    border: 1px solid rgba(30, 41, 59, 0.15);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
    max-height: calc(100vh - var(--header-height) - var(--space-lg));
    min-height: 0;
}

.case-study-card.case-study-card--highlight {
    box-shadow: 0 0 32px rgba(37, 99, 235, 0.28), 0 0 0 2px rgba(37, 99, 235, 0.18);
}

.case-study-card:hover {
    box-shadow: var(--shadow-md);
}

.case-study-card:hover .header-id {
    background: var(--color-card-header-accent);
    color: #e2e8f0;
    transition: background 0.3s ease;
}


.case-study-header {
    position: relative;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: rgba(248, 250, 252, 0.8);
    z-index: 3;
    display: flex;
    height: 2rem;
}

.case-study-title-block {
    position: relative;
    background: rgba(248, 250, 252, 0.6);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3;
    height: 5rem;
    overflow: hidden;
}

.case-study-title-block::before {
    content: 'TITLE';
    position: absolute;
    bottom: 0.25rem;
    left: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.2);
    z-index: 1;
}

.case-study-title-block::after {
    content: 'STATUS';
    position: absolute;
    bottom: 0.25rem;
    right: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.2);
    z-index: 1;
}

.case-study-content {
    padding: var(--space-md) var(--space-lg) var(--space-md);
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
    background-image: var(--grid-pattern-brand);
    background-size: var(--grid-size-sm);
    min-height: 0;
}

.case-study-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.95) 100%);
    pointer-events: none;
    z-index: 1;
    transition: background 0.6s ease;
}

.case-study-card:hover .case-study-content::before {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0.98) 100%);
}

.case-study-content > * {
    position: relative;
    z-index: 2;
}

.case-study-title {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 500;
    margin: 0;
    color: var(--color-slate-800);
    line-height: 1.3;
    flex: 1;
    padding-right: var(--space-md);
    display: flex;
    align-items: center;
    min-height: 0;
    position: relative;
}

.case-study-title::after {
    content: attr(data-title);
    position: absolute;
    top: 10px;
    left: 4px;
    font-family: 'Architects Daughter', monospace;
    font-size: 1.15rem;
    font-weight: 300;
    color: var(--color-slate-400);
    opacity: 0.15;
    z-index: -1;
    pointer-events: none;
    letter-spacing: 0.03em;
    text-shadow:
        0 0 1px rgba(0, 0, 0, 0.1),
        1px 0 0 rgba(0, 0, 0, 0.05),
        -1px 0 0 rgba(0, 0, 0, 0.05),
        0 1px 0 rgba(0, 0, 0, 0.05);
    transform: rotate(-0.5deg) skewX(-1deg);
    filter: blur(0.1px);
    text-transform: uppercase;
    transition: opacity 0.6s ease;
}

.case-study-card:hover .case-study-title::after {
    opacity: 0;
}

.case-study-card.has-link .case-study-title::after {
    display: none;
}

.case-study-card:not(.has-link) .case-study-title {
    color: rgba(15, 23, 42, 0.4);
    font-weight: 500;
    letter-spacing: 0.05em;
    /* font-style: italic; */
    /* opacity: 0.78; */
    /* filter: blur(0.25px); */
    transform: rotate(-0.6deg);
    /* text-shadow:
        1px 1px 0 rgba(15, 23, 42, 0.15),
        -1px 0 0 rgba(15, 23, 42, 0.08),
        0 2px 4px rgba(0, 0, 0, 0.08); */
    margin-left: 0.4rem;
    padding: 0 0.4rem;
    border-radius: 2px;
    background: linear-gradient(90deg, transparent 25%, rgba(255, 255, 255, 0.35) 55%, transparent 85%);
    mix-blend-mode: multiply;
    /* animation: wobbleDraftTitle 4.6s ease-in-out infinite; */
}

.case-study-card:not(.has-link):nth-of-type(4n+1) .case-study-title {
    transform: rotate(-1.2deg) translateY(2px);
    margin-left: 0.2rem;
}

.case-study-card:not(.has-link):nth-of-type(4n+2) .case-study-title {
    transform: rotate(0.7deg) translateY(-1px);
    margin-left: 0.5rem;
    letter-spacing: 0.065em;
}

.case-study-card:not(.has-link):nth-of-type(4n+3) .case-study-title {
    transform: rotate(-0.2deg) translateY(1px);
    margin-left: 0.25rem;
    opacity: 0.74;
}

.case-study-card:not(.has-link):nth-of-type(4n) .case-study-title {
    transform: rotate(1.1deg) translateY(-2px);
    margin-left: 0.6rem;
}

.case-study-card:not(.has-link) .case-study-title::after {
    display: none;
}

@keyframes wobbleDraftTitle {
    0%, 100% {
        transform: translateY(0) rotate(-0.5deg);
    }
    50% {
        transform: translateY(1px) rotate(0.4deg);
    }
}


.case-status {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 3px;
    text-transform: uppercase;
}

.case-status.completed,
.case-status.published {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}

.case-status.beta,
.case-status.in-progress {
    background: var(--color-brand-light);
    color: var(--color-brand-primary);
}

.case-status.poc,
.case-status.planning {
    background: var(--color-warning-light);
    color: var(--color-warning-dark);
}

.case-study-subtitle {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    font-style: italic;
}

.case-study-specs {
    margin-bottom: var(--space-sm);
}

.case-spec {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
}

.spec-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: rgba(30, 64, 175, 0.4);
    font-weight: 400;
}

.spec-value {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    font-weight: 400;
}

.case-study-description {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--space-md);
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.case-study-related {
    margin-top: var(--space-sm);
    margin-bottom: var(--space-md);
    padding: var(--space-sm);
    background: var(--color-bg-secondary);
    border-radius: 8px;
}

.related-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-brand-primary);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.related-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    height: calc(2 * 2.5rem); /* Fixed height for 2 single-line studies */
    overflow-y: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

.related-list::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.related-list:hover {
    scrollbar-width: thin; /* Firefox */
}

.related-list:hover::-webkit-scrollbar {
    width: 6px;
}

.related-list:hover::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.related-list:hover::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: 3px;
}

.related-list:hover::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

.related-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--color-gray-600);
    text-decoration: none;
    padding: 4px 6px;
    background: var(--color-bg-primary);
    border-radius: 4px;
    border: 1px solid var(--color-gray-200);
    transition: all 0.2s ease;
    margin-bottom: 4px;
}

.related-link:hover {
    color: var(--color-brand-primary);
    border-color: var(--color-brand-primary);
}

.related-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-brand-primary);
    min-width: 50px;
}

.related-title {
    font-size: 0.8rem;
    font-weight: 400;
    flex: 1;
}

.case-study-bottom {
    margin-top: auto;
    flex-shrink: 0;
}

.case-study-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0;
}

.case-study-footer .button.primary {
    background: transparent;
    color: var(--color-brand-primary);
    border: 2px solid var(--color-brand-primary);
    width: 150px;
    height: 100px;
    padding: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    white-space: normal;
    text-align: center;
    line-height: 1.3;
    box-sizing: border-box;
    flex-shrink: 0;
}

.case-study-footer .button.primary:hover {
    background: var(--color-brand-primary);
    color: white;
    transform: translateY(-2px);
}

.case-study-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    max-height: 200px;
    overflow-y: auto;
    flex-shrink: 1;
    align-content: flex-start;
    flex: 1;
    min-width: 0;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE/Edge */
}

.case-study-tags::-webkit-scrollbar {
    width: 0;
    height: 0;
}

.case-study-tags:hover {
    scrollbar-width: thin; /* Firefox */
}

.case-study-tags:hover::-webkit-scrollbar {
    width: 6px;
}

.case-study-tags:hover::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

.case-study-tags:hover::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: 3px;
}

.case-study-tags:hover::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}

.case-tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    background: var(--color-bg-secondary);
    color: var(--color-text-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}


.case-specs {
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-md);
}

.spec {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--color-gray-100);
}

.spec:last-child {
    border-bottom: none;
}

.spec-label {
    font-weight: 500;
    color: var(--color-text-tertiary);
}

.spec-value {
    font-weight: 500;
    color: var(--color-gray-900);
}

.case-description {
    padding: 0 var(--space-lg);
    margin-bottom: var(--space-lg);
}

.case-description p {
    color: var(--color-gray-700);
    line-height: 1.6;
}


.case-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tag {
    font-size: 0.75rem;
    padding: 0.25rem var(--space-xs);
    background: var(--color-border-light);
    color: var(--color-gray-700);
    border-radius: 12px;
    font-weight: 500;
}

/* Case Studies Philosophy Section */
.case-studies-philosophy {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-secondary);
}

/* ==========================================================================
   CASE STUDY MAIN PAGE STYLES
   ========================================================================== */

.case-study-main {
    background: var(--color-bg-secondary);
    min-height: 100vh;
    padding: 120px 0 var(--space-3xl);
}

.case-study-main-card,
.case-study-content-card,
.case-study-nav-card {
    background: var(--color-bg-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
}

/* Header Card */
.case-study-main-header {
    position: relative;
    background: var(--grid-pattern-brand);
    background-size: 20px 20px;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    height: 3rem;
    z-index: 2;
}

.case-study-main-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(30, 64, 175, 0.95) 0%, 
        rgba(30, 58, 138, 0.95) 100%);
    z-index: 1;
}

.case-study-main-header > * {
    position: relative;
    z-index: 2;
    color: white;
}

.case-study-hero-block {
    padding: var(--space-2xl) var(--space-lg) var(--space-lg);
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.case-main-title {
    font-family: var(--font-brand);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-slate-800);
    margin-bottom: var(--space-sm);
    line-height: 1.2;
}

.case-main-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    font-style: italic;
}

.case-main-specs {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.case-main-spec {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.case-main-spec:last-child {
    border-bottom: none;
}

.case-status-large {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    padding: var(--space-sm) var(--space-md);
    border-radius: 6px;
    text-transform: uppercase;
    text-align: center;
    margin-bottom: var(--space-lg);
}

.case-status-large.completed,
.case-status-large.published {
    background: var(--color-success-light);
    color: var(--color-success-dark);
}

.case-status-large.beta,
.case-status-large.in-progress {
    background: var(--color-brand-light);
    color: var(--color-brand-primary);
}

.case-status-large.poc,
.case-status-large.planning {
    background: var(--color-warning-light);
    color: var(--color-warning-dark);
}

.case-project-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.meta-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: rgba(30, 64, 175, 0.4);
    text-transform: lowercase;
}

.meta-value {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Content Blocks */
.content-block {
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--space-2xl) var(--space-lg);
}

.content-block:last-child {
    border-bottom: none;
}

.block-header {
    position: relative;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-brand-primary);
}

.block-title {
    font-family: var(--font-brand);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-slate-800);
    margin: 0;
}

.block-field-label {
    position: absolute;
    bottom: 0.25rem;
    right: 0;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.2);
}

.block-content {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.block-content p {
    margin-bottom: var(--space-md);
}

.block-content p:last-child {
    margin-bottom: 0;
}

/* Requirements Grid */
.requirements-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.requirement-column {
    background: var(--color-bg-secondary);
    padding: var(--space-md);
    border-radius: 8px;
}

.column-title {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-brand-primary);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.requirement-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.requirement-list li {
    padding: var(--space-xs) 0;
    border-bottom: 1px solid var(--color-border-light);
    font-size: 0.9rem;
}

.requirement-list li:last-child {
    border-bottom: none;
}

/* Architecture Steps */
.architecture-steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.arch-step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.step-number {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-brand-primary);
    background: var(--color-bg-secondary);
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-title {
    font-weight: 600;
    color: var(--color-slate-800);
    margin-bottom: var(--space-xs);
}

.step-description {
    margin-bottom: var(--space-xs);
}

.step-technical {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
}

/* Component Reuse Grid */
.reuse-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.reuse-category {
    background: var(--color-bg-secondary);
    padding: var(--space-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-gray-400);
}

.reuse-category.success {
    border-left-color: var(--color-success);
}

.reuse-category.adapted {
    border-left-color: var(--color-warning);
}

.reuse-category.new {
    border-left-color: var(--color-info);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.category-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-slate-800);
    margin: 0;
}

.category-percentage {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--color-brand-primary);
}

.category-items {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-items li {
    padding: var(--space-xs) 0;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Results Metrics */
.results-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.metric-item {
    text-align: center;
    background: var(--color-bg-secondary);
    padding: var(--space-md);
    border-radius: 8px;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-brand-primary);
    margin-bottom: var(--space-xs);
}

.metric-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.design-philosophy h3 {
    font-weight: 600;
    color: var(--color-slate-800);
    margin-bottom: var(--space-sm);
}

.philosophy-points {
    list-style: none;
    padding: 0;
    margin: 0;
}

.philosophy-points li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
}

.philosophy-points li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-brand-primary);
    font-weight: 600;
}

/* Lessons Grid */
.lessons-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.lesson-item {
    background: var(--color-bg-secondary);
    padding: var(--space-md);
    border-radius: 8px;
    border-left: 4px solid var(--color-brand-primary);
}

.lesson-title {
    font-weight: 600;
    color: var(--color-slate-800);
    margin-bottom: var(--space-xs);
}

.lesson-content {
    margin: 0;
}

/* Navigation Card */
.case-study-nav-card {
    background: var(--color-bg-tertiary);
}

.case-nav-content {
    padding: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Related Studies */
.related-studies-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.related-study-item {
    border-left: 3px solid var(--color-brand-primary);
    padding-left: var(--space-sm);
}

.related-study-link {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--color-gray-700);
    transition: color 0.2s ease;
}

.related-study-link:hover {
    color: var(--color-brand-primary);
}

.related-study-number {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-brand-primary);
    font-weight: 500;
    min-width: 60px;
}

.related-study-title {
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 768px) {
    .case-study-hero-block {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .requirements-grid,
    .reuse-grid {
        grid-template-columns: 1fr;
    }
    
    .results-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .case-nav-content {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .case-main-title {
        font-size: 2rem;
    }
}

.philosophy-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.philosophy-text p {
    font-size: 1.1rem;
    color: var(--color-gray-700);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.philosophy-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.philosophy-stats .stat {
    background: var(--color-bg-primary);
    padding: var(--space-md);
    border-radius: 8px;
    text-align: center;
}

.philosophy-stats .stat h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-brand-secondary);
    margin-bottom: var(--space-xs);
}

.philosophy-stats .stat p {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* ==========================================================================
   7. RESPONSIVE DESIGN
   ========================================================================== */

/* Tablet and Small Desktop Styles */
@media (max-width: 768px) {
    /* Container adjustments */
    .container {
        padding: 0 var(--space-sm);
    }
    
    /* Section padding adjustments */
    .features, .about, .cta, .contact {
        min-height: auto;
        padding: var(--space-2xl) var(--space-sm);
    }
    
    /* Hero section mobile optimization */
    .hero {
        min-height: 100vh;
        min-height: 100svh;
        padding: var(--space-lg) var(--space-sm);
        align-items: center;
        position: relative;
    }
    
    .hero-brand {
        position: absolute;
        top: 10vh;
        left: 50%;
        transform: translateX(-50%);
        width: 100%;
        padding-top: 0;
    }
    
    .hero-content {
        position: relative;
        z-index: 4;
    }
    
    .hero-title {
        font-size: 1.5rem;
    }
    
    /* Grid adjustments */
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-study-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    .philosophy-content {
        grid-template-columns: 1fr;
    }
    
    .philosophy-stats {
        flex-direction: row;
        justify-content: space-around;
    }
}

/* Navigation mobile styles */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg-primary);
        flex-direction: column;
        padding: var(--space-sm);
        box-shadow: var(--shadow-sm);
    }
    
    .nav-links.mobile-menu-open {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Hero mobile adjustments */
    .hero-content {
        text-align: center;
        padding: var(--space-lg) 0;
    }
    
    .hero-title {
        font-size: 1.5rem;
        line-height: 1.2;
        margin-bottom: var(--space-md);
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: var(--space-lg);
    }
    
    /* Grid mobile adjustments */
    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
    
    .about-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
}

/* Mobile Styles */
@media (max-width: 480px) {
    /* Navigation mobile refinements */
    .nav {
        padding: var(--space-sm);
    }
    
    .nav-logo {
        height: 29px;
        max-width: 29px;
    }
    
    .brand-link h1 {
        font-size: 1.4rem;
    }
    
    /* Hero mobile refinements */
    .hero {
        padding: var(--space-3xl) var(--space-sm) var(--space-xl);
    }
    
    .hero-title {
        font-size: 1.5rem;
        line-height: 1.1;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: var(--space-sm);
    }
    
    .button {
        min-width: 200px;
    }
    
    /* Statistics mobile layout */
    .about-stats {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    /* Container mobile adjustments */
    .container {
        padding: 0 var(--space-sm);
    }
}

/* ==========================================================================
   8. UTILITY CLASSES
   ========================================================================== */

/* Spacing utilities */
.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Text utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-brand { color: var(--color-brand-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }

/* Display utilities */
.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Flexbox utilities */
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.align-center { align-items: center; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }

/* Background utilities */
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-brand { background-color: var(--color-brand-primary); }

/* Border utilities */
.border { border: 1px solid var(--color-border-light); }
.border-0 { border: none; }
.rounded { border-radius: 4px; }
.rounded-lg { border-radius: 8px; }
.rounded-xl { border-radius: 12px; }

/* Shadow utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Transition utilities */
.transition-fast { transition: all var(--transition-fast); }
.transition-normal { transition: all var(--transition-normal); }
.transition-slow { transition: all var(--transition-slow); }

/* Responsive visibility utilities */
@media (max-width: 768px) {
    .hidden-mobile { display: none !important; }
    .visible-mobile { display: block !important; }
}

@media (min-width: 769px) {
    .hidden-desktop { display: none !important; }
    .visible-desktop { display: block !important; }
}

/* Print styles */
@media print {
    .no-print { display: none !important; }
    
    .header {
        position: static !important;
        box-shadow: none !important;
    }
    
    .hero {
        min-height: auto !important;
        padding: var(--space-lg) !important;
    }
}

/* ==========================================================================
   TECH SPECS EASTER EGG
   ========================================================================== */

.tech-specs-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 1;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
    pointer-events: none;
}

.tech-specs-overlay.active {
    opacity: 0.15;
}

.tech-specs-panel {
    background: rgba(255, 255, 255, 0.8);
    background-image: var(--grid-pattern-brand);
    background-size: var(--grid-size-sm);
    border: 1px solid rgba(30, 64, 175, 0.3);
    border-radius: 15px;
    width: clamp(600px, 80vw, 1000px);
    max-height: 70vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

.tech-specs-header {
    position: relative;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: rgba(248, 250, 252, 0.8);
    z-index: 3;
    display: flex;
    height: 2rem;
    flex-shrink: 0;
    padding-right: 2.5rem;
    border-radius: 15px 15px 0 0;
}

.tech-specs-header .header-brand {
    font-family: var(--font-brand);
    font-size: 0.8rem;
    font-weight: 400;
    color: rgba(30, 64, 175, 0.4);
    padding: var(--space-xs);
    display: flex;
    align-items: center;
}

.tech-specs-header .header-line {
    width: 1px;
    background: rgba(30, 64, 175, 0.2);
    height: 100%;
}

.tech-specs-header .header-id {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: rgba(30, 64, 175, 1);
    padding: var(--space-xs);
    display: flex;
    align-items: center;
}

.tech-specs-content {
    padding: var(--space-lg);
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.close-button {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: none;
    font-family: var(--font-mono);
    font-size: 1.2rem;
    color: rgba(30, 64, 175, 0.4);
    cursor: pointer;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0;
    transition: all 0.2s ease;
    z-index: 10;
}

.close-button:hover {
    background: var(--color-bg-secondary);
    color: var(--color-brand-primary);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(250px, 100%), 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

@media (min-width: 600px) {
    .specs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.spec-section {
    background: rgba(248, 250, 252, 0.4);
    padding: var(--space-md);
    border-radius: 6px;
}

.spec-section h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-brand-primary);
    margin: 0 0 var(--space-sm) 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--space-xs) 0;
    border-bottom: 1px solid rgba(203, 213, 225, 0.5);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    gap: var(--space-sm);
}

.spec-label {
    flex: 1;
    color: var(--color-text-secondary);
}

.spec-item .spec-value {
    flex: 0 1 auto;
    color: var(--color-slate-800);
    font-weight: 500;
    text-align: right;
    word-break: break-word;
    max-width: 60%;
}

.spec-item:last-child {
    border-bottom: none;
}

.spec-value.success {
    color: var(--color-success-dark);
}

.spec-value.warning {
    color: var(--color-warning);
}

.spec-value.mono {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    font-size: 0.8rem;
}

.build-info {
    background: rgba(241, 243, 244, 0.5);
    padding: var(--space-md);
    border-radius: 6px;
    margin-top: var(--space-lg);
}

.build-info h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--color-slate-800);
    margin: 0 0 var(--space-sm) 0;
}

.build-command {
    font-family: var(--font-mono);
    background: var(--color-slate-800);
    color: var(--color-bg-primary);
    padding: var(--space-sm);
    border-radius: 4px;
    font-size: 0.8rem;
    overflow-x: auto;
    white-space: pre-wrap;
}

@media (max-width: 768px) {
    .form-labels {
        width: 120px;
    }
    
    .tech-specs-overlay {
        align-items: flex-start;
        padding-top: 5vh;
    }
    
    .tech-specs-panel {
        width: clamp(300px, 95vw, 600px);
        height: auto;
        max-height: none;
        margin: 0 auto;
        padding: var(--space-md);
    }
    
    .tech-specs-content {
        padding: 0;
        overflow-y: visible;
        max-height: none;
    }
}

/* Easter Egg - Peak and Subside Effect */
.hero-title span[onclick] {
    cursor: default !important;
    user-select: none !important;
    -webkit-user-select: none !important;
    -moz-user-select: none !important;
    -ms-user-select: none !important;
    display: inline-block;
}

.hero-title span[onclick] {
    transition: transform 0.3s ease-out, filter 0.3s ease-out;
    cursor: pointer;
}

.hero-title span[onclick]::selection {
    background: transparent !important;
}

.hero-title span[onclick]::-moz-selection {
    background: transparent !important;
}

/* Disabled Button State */
.button.disabled {
    opacity: 0.15;
    cursor: not-allowed;
    pointer-events: none;
}

/* ==========================================================================
   CASE STUDY DETAIL PAGE STYLES
   ========================================================================== */

.case-study-detail {
    background: var(--color-bg-secondary);
    min-height: 100vh;
    padding: 120px 0 var(--space-3xl);
}

.case-study-detail-card {
    background: var(--color-bg-primary);
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    margin-bottom: var(--space-xl);
}

/* Detail Header - matches index card styling */
.case-study-detail .case-study-header {
    position: relative;
    border-bottom: 1px solid rgba(30, 64, 175, 0.2);
    background: rgba(248, 250, 252, 0.8);
    z-index: 3;
    display: flex;
    height: 2rem;
}

/* Detail Title Block - matches index card styling */
.case-study-detail .case-study-title-block {
    position: relative;
    background: rgba(248, 250, 252, 0.6);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 3;
    min-height: 5rem;
}

.case-study-detail .case-study-title-block::before {
    content: 'TITLE';
    position: absolute;
    bottom: 0.25rem;
    left: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.2);
    z-index: 1;
}

.case-study-detail .case-study-title-block::after {
    content: 'STATUS';
    position: absolute;
    bottom: 0.25rem;
    right: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: rgba(30, 64, 175, 0.2);
    z-index: 1;
}

.case-detail-title {
    font-family: var(--font-mono);
    font-size: 1.75rem;
    font-weight: 100;
    color: var(--color-slate-800);
    line-height: 1.3;
    margin: 0;
    flex: 1;
    padding-right: var(--space-md);
    display: flex;
    align-items: center;
    min-height: 0;
    z-index: 2;
}

.case-study-detail .case-status {
    z-index: 2;
}

/* Detail Meta Grid */
.case-detail-meta {
    position: relative;
    padding: var(--space-lg) var(--space-xl) var(--space-xl);
    background: var(--grid-pattern-subtle);
    background-size: 20px 20px;
}

.case-detail-meta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0.95) 100%);
    pointer-events: none;
    z-index: 1;
}

.case-detail-meta > * {
    position: relative;
    z-index: 2;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.meta-label {
    font-family: 'Geist Mono', monospace;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
}

.meta-value {
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    color: var(--color-text-primary);
    font-weight: 500;
}

.case-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* Markdown Content Styling */
.case-detail-content {
    padding: var(--space-xl);
    font-family: 'Inter', sans-serif;
    color: var(--color-text-primary);
    line-height: 1.7;
}

.case-detail-content h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-lg);
    line-height: 1.3;
}

.case-detail-content h2:first-child {
    margin-top: 0;
}

.case-detail-content h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    line-height: 1.4;
}

.case-detail-content h4 {
    font-family: 'Inter', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.case-detail-content p {
    margin-bottom: var(--space-lg);
    color: var(--color-text-secondary);
}

.case-detail-content ul,
.case-detail-content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.case-detail-content li {
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
}

.case-detail-content strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.case-detail-content em {
    font-style: italic;
    color: var(--color-text-secondary);
}

.case-detail-content code {
    font-family: 'Geist Mono', monospace;
    font-size: 0.9em;
    background: var(--color-bg-secondary);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    color: var(--color-brand-primary);
}

.case-detail-content pre {
    background: var(--color-bg-secondary);
    padding: var(--space-lg);
    border-radius: 8px;
    overflow-x: auto;
    margin-bottom: var(--space-lg);
}

.case-detail-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text-primary);
}

.case-detail-content blockquote {
    border-left: 4px solid var(--color-brand-primary);
    padding-left: var(--space-lg);
    margin: var(--space-xl) 0;
    color: var(--color-text-secondary);
    font-style: italic;
}

.case-detail-content img {
    max-width: 100%;
    height: auto;
    margin: var(--space-lg) auto;
    display: block;
}

.case-detail-content figure {
    margin: var(--space-lg) auto;
}

/* Image alignment options - use markdown attributes */
.case-detail-content img[alt*="[left]"],
.case-detail-content figure:has(img[alt*="[left]"]) {
    margin-left: 0;
    margin-right: auto;
}

.case-detail-content img[alt*="[right]"],
.case-detail-content figure:has(img[alt*="[right]"]) {
    margin-left: auto;
    margin-right: 0;
}

.case-detail-content img[alt*="[center]"],
.case-detail-content figure:has(img[alt*="[center]"]) {
    margin-left: auto;
    margin-right: auto;
}

.case-detail-content figcaption {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: var(--space-sm);
    font-style: italic;
}

/* Related Studies Section */
.case-detail-related {
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-bg-secondary);
}

.related-heading {
    font-family: 'Geist Mono', monospace;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-lg);
}

.related-studies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.related-study-card {
    display: block;
    background: var(--color-bg-primary);
    padding: var(--space-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border-light);
    text-decoration: none;
    transition: all 0.2s ease;
}

.related-study-card:hover {
    border-color: var(--color-brand-primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.related-study-number {
    font-family: 'Geist Mono', monospace;
    font-size: 0.75rem;
    color: var(--color-brand-primary);
    margin-bottom: var(--space-xs);
    display: block;
}

.related-study-title {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-sm);
    display: block;
    line-height: 1.3;
}

.related-study-summary {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    color: var(--color-text-tertiary);
    line-height: 1.5;
}

/* Navigation Footer */
.case-detail-nav {
    padding: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    border-top: 1px solid var(--color-border-light);
}

/* Sitemap Page */
.sitemap-page {
    background: var(--color-bg-secondary);
    min-height: 60vh;
}

.sitemap-section {
    padding: var(--space-xl) 0;
}

.sitemap-heading {
    font-family: var(--font-brand);
    font-size: 1.5rem;
    color: var(--color-about-header-default);
    margin-bottom: var(--space-md);
}

.sitemap-list {
    list-style: none;
    padding-left: 0;
    display: grid;
    gap: 0.75rem;
}

.sitemap-list li a {
    color: var(--color-brand-secondary);
    text-decoration: none;
    font-weight: 300;
    font-family: var(--font-mono);
}

.sitemap-list li a:hover {
    text-decoration: underline;
}

.sitemap-detail-link {
    font-size: 0.85rem;
    margin-left: 0.35rem;
    color: var(--color-text-secondary);
}

.sitemap-note {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: -1.5rem;
    margin-bottom: var(--space-lg);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .case-study-detail {
        padding: 100px 0 var(--space-xl);
    }

    .case-study-detail .case-study-title-block {
        flex-direction: column;
        padding: var(--space-md) var(--space-lg);
        align-items: flex-start;
        min-height: auto;
    }

    .case-detail-title {
        font-size: 1.35rem;
        padding-right: 0;
        margin-bottom: var(--space-sm);
    }

    .case-detail-meta,
    .case-detail-content,
    .case-detail-related,
    .case-detail-nav {
        padding: var(--space-lg);
    }

    .meta-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .case-detail-content h2 {
        font-size: 1.5rem;
    }

    .case-detail-content h3 {
        font-size: 1.25rem;
    }

    .related-studies-grid {
        grid-template-columns: 1fr;
    }

    .case-detail-nav {
        flex-direction: column;
    }

    .case-detail-nav .button {
        width: 100%;
        text-align: center;
    }
}