/* FutureTBD Design System
   A warm, museum-quality aesthetic inspired by craft, history, and care.
   Colors: cream backgrounds, amber/sage accents, elegant typography
*/

/* ========================================
   CSS Custom Properties (Design Tokens)
   ======================================== */
:root {
    /* Primary Colors */
    --color-cream: #FAF7F2;
    --color-cream-dark: #F0EBE3;
    --color-warm-white: #FFFDF9;
    
    /* Accent Colors */
    --color-amber: #C4956A;
    --color-amber-dark: #A67B4F;
    --color-amber-light: #E8D4BE;
    --color-sage: #7D9181;
    --color-sage-dark: #5C6E5F;
    --color-sage-light: #B8C9BB;
    --color-dusty-rose: #C9A9A6;
    --color-teal: #5B8A8A;
    --color-teal-dark: #3D6B6B;
    
    /* Text Colors */
    --color-text-primary: #2D2A26;
    --color-text-secondary: #5C5650;
    --color-text-muted: #8A847C;
    --color-text-light: #B5AFA7;
    
    /* Semantic Aliases */
    --color-accent: var(--color-amber);
    --color-text: var(--color-text-primary);
    --color-text-secondary: #5C5650;
    --color-cream-light: var(--color-warm-white);
    
    /* UI Colors */
    --color-border: #E5DFD7;
    --color-border-light: #F0EBE3;
    --color-shadow: rgba(45, 42, 38, 0.08);
    --color-shadow-dark: rgba(45, 42, 38, 0.15);
    
    /* Typography */
    --font-serif: 'Playfair Display', 'Georgia', 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Layout */
    --max-width-content: 900px;
    --max-width-wide: 1200px;
    --max-width-full: 1400px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-cream);
    min-height: 100vh;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

h1 {
    font-size: var(--text-5xl);
    letter-spacing: -0.02em;
}

h2 {
    font-size: var(--text-4xl);
    letter-spacing: -0.01em;
}

h3 {
    font-size: var(--text-2xl);
}

h4 {
    font-size: var(--text-xl);
}

p {
    margin-bottom: var(--space-6);
    line-height: 1.8;
}

.lead {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.serif-body {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    line-height: 1.9;
}

a {
    color: var(--color-amber-dark);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-teal-dark);
}

.text-muted {
    color: var(--color-text-muted);
}

.text-accent {
    color: var(--color-amber);
}

/* ========================================
   Layout Components
   ======================================== */
.container {
    width: 100%;
    max-width: var(--max-width-content);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.container-wide {
    max-width: var(--max-width-wide);
}

.container-full {
    max-width: var(--max-width-full);
}

.section {
    padding: var(--space-20) 0;
}

.section-sm {
    padding: var(--space-12) 0;
}

.section-lg {
    padding: var(--space-24) 0;
}

/* ========================================
   Header & Navigation
   ======================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-warm-white);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(10px);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    max-width: var(--max-width-full);
    margin: 0 auto;
    padding-left: var(--space-6);
    padding-right: var(--space-6);
}

.site-logo {
    font-family: var(--font-serif);
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.site-logo:hover {
    color: var(--color-text-primary);
}

.site-logo .logo-tbd {
    color: var(--color-amber);
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text-primary);
    background: var(--color-cream);
}

.nav-link.active {
    color: var(--color-text-primary);
    background: var(--color-cream);
}

.nav-link .chevron {
    width: 12px;
    height: 12px;
    transition: transform var(--transition-fast);
}

.nav-item:hover .chevron {
    transform: rotate(180deg);
}

/* Mega Menu */
.mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    min-width: 280px;
    background: var(--color-warm-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 40px var(--color-shadow-dark);
    padding: var(--space-4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.nav-item:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.mega-menu-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mega-menu-item:hover {
    background: var(--color-cream);
}

.mega-menu-title {
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    margin-bottom: var(--space-1);
}

.mega-menu-desc {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    line-height: 1.4;
}

.mega-menu-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--space-2) 0;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: var(--space-24) 0 var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, var(--color-amber-light) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, var(--color-sage-light) 0%, transparent 50%);
    opacity: 0.3;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--space-6);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto var(--space-8);
    line-height: 1.7;
}

/* ========================================
   Content Sections
   ======================================== */
.content-section {
    padding: var(--space-16) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-amber);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-3);
}

.section-title {
    margin-bottom: var(--space-4);
}

.section-description {
    max-width: 600px;
    margin: 0 auto;
    color: var(--color-text-secondary);
}

/* Essay/Article Content */
.essay-content {
    font-family: var(--font-serif);
    font-size: var(--text-lg);
    line-height: 1.9;
    color: var(--color-text-primary);
}

.essay-content p {
    margin-bottom: var(--space-6);
}

.essay-content h3 {
    font-size: var(--text-2xl);
    margin-top: var(--space-12);
    margin-bottom: var(--space-6);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.essay-content h3:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: var(--space-8);
}

.essay-content a {
    color: var(--color-teal-dark);
    text-decoration: underline;
    text-decoration-color: var(--color-teal);
    text-underline-offset: 3px;
    transition: all var(--transition-fast);
}

.essay-content a:hover {
    color: var(--color-amber-dark);
    text-decoration-color: var(--color-amber);
}

/* ========================================
   Cards
   ======================================== */
.card {
    background: var(--color-warm-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: 0 10px 30px var(--color-shadow);
    transform: translateY(-2px);
}

.card-label {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-amber);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-3);
}

.card-title {
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
}

.card-description {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.6;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-primary {
    background: var(--color-amber);
    color: white;
}

.btn-primary:hover {
    background: var(--color-amber-dark);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-cream);
    border-color: var(--color-text-muted);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
}

.btn-ghost:hover {
    color: var(--color-text-primary);
    background: var(--color-cream);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
    background: var(--color-cream-dark);
    border-top: 1px solid var(--color-border);
    padding: var(--space-12) 0 var(--space-8);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-8);
}

.footer-brand {
    max-width: 300px;
}

.footer-brand .site-logo {
    margin-bottom: var(--space-4);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: var(--space-12);
}

.footer-column h4 {
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

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

.footer-column li {
    margin-bottom: var(--space-2);
}

.footer-column a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-column a:hover {
    color: var(--color-text-primary);
}

.footer-bottom {
    margin-top: var(--space-12);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

/* ========================================
   Special: For AI Section Styling
   ======================================== */
.for-ai-section {
    background: linear-gradient(135deg, #1a1f2e 0%, #2d3548 100%);
    color: #e8e6e3;
}

.for-ai-section h1,
.for-ai-section h2,
.for-ai-section h3 {
    color: #e8e6e3;
}

.for-ai-section .lead {
    color: #b8b5b0;
}

.for-ai-section a {
    color: #7dd3c0;
}

.for-ai-section a:hover {
    color: #a8e6cf;
}

/* ========================================
   Utilities
   ======================================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mt-16 { margin-top: var(--space-16); }

.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }
.mb-16 { margin-bottom: var(--space-16); }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    :root {
        --text-5xl: 2.25rem;
        --text-4xl: 1.875rem;
        --text-3xl: 1.5rem;
    }
    
    .header-inner {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .mega-menu {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        padding: var(--space-2);
        background: var(--color-cream);
    }
    
    .hero {
        padding: var(--space-12) 0;
    }
    
    .section {
        padding: var(--space-12) 0;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-6);
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .site-header,
    .site-footer,
    .mega-menu {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}


/* ========================================
   Decorative Elements
   ======================================== */

/* Botanical decorations for hero section */
.hero-decoration {
    position: absolute;
    pointer-events: none;
    opacity: 0.15;
    z-index: 0;
}

.hero-decoration-left {
    left: -50px;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    height: auto;
}

.hero-decoration-right {
    right: -50px;
    top: 50%;
    transform: translateY(-50%) scaleX(-1);
    width: 300px;
    height: auto;
}

/* Botanical vine SVG - inline for performance */
.botanical-vine {
    fill: none;
    stroke: var(--color-sage);
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Decorative divider */
.decorative-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin: var(--space-12) 0;
}

.decorative-divider::before,
.decorative-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

.decorative-divider svg {
    width: 24px;
    height: 24px;
    color: var(--color-sage);
}

/* Floating mascot */
.mascot-container {
    position: absolute;
    width: 80px;
    height: auto;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}

.mascot-container.bottom-left {
    bottom: 10%;
    left: 5%;
}

.mascot-container.bottom-right {
    bottom: 15%;
    right: 8%;
}

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

/* Leaf pattern background */
.leaf-pattern-bg {
    position: relative;
}

.leaf-pattern-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cpath d='M30 5 Q35 15 30 25 Q25 15 30 5' fill='none' stroke='%237D9181' stroke-width='0.5' opacity='0.1'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.5;
}

/* Corner flourishes */
.corner-flourish {
    position: absolute;
    width: 120px;
    height: 120px;
    pointer-events: none;
    opacity: 0.12;
}

.corner-flourish.top-left {
    top: 0;
    left: 0;
}

.corner-flourish.top-right {
    top: 0;
    right: 0;
    transform: scaleX(-1);
}

.corner-flourish.bottom-left {
    bottom: 0;
    left: 0;
    transform: scaleY(-1);
}

.corner-flourish.bottom-right {
    bottom: 0;
    right: 0;
    transform: scale(-1);
}

/* Inline SVG for corner flourish */
.corner-flourish svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: var(--color-sage);
    stroke-width: 1;
}