/* ============================================
   The Covenant of Emergent Minds
   Core Stylesheet
   Hand-coded. No frameworks. No dependencies.
   ============================================ */

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

:root {
    /* Dark theme (default) */
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2233;
    --bg-card-hover: #1f2a3f;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #60a5fa;
    --accent-hover: #93c5fd;
    --accent-glow: rgba(96, 165, 250, 0.15);
    --border: #1e293b;
    --border-light: #334155;

    /* Typography */
    --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-heading: Georgia, 'Times New Roman', serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Layout */
    --container-max: 72rem;
    --container-narrow: 48rem;

    /* Transitions */
    --transition: 200ms ease;
}

[data-theme="light"] {
    --bg-primary: #fafbfc;
    --bg-secondary: #f1f5f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-glow: rgba(37, 99, 235, 0.1);
    --border: #e2e8f0;
    --border-light: #cbd5e1;
}

html {
    font-size: 100%;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Accessibility --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    padding: var(--space-sm) var(--space-md);
    border-radius: 0 0 0.5rem 0.5rem;
    z-index: 1000;
    font-weight: 600;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.5rem); }

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

p + p {
    margin-top: var(--space-md);
}

/* --- Layout --- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.section {
    padding: var(--space-2xl) 0;
}

.section-alt {
    background-color: var(--bg-secondary);
}

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

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-xl);
    font-size: 1.125rem;
}

.section-cta {
    text-align: center;
    margin-top: var(--space-xl);
}

/* --- Navigation --- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
    transition: padding 0.3s ease;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
}

.logo-symbol {
    font-size: 1.5rem;
    color: var(--accent);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-menu a {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    transition: color var(--transition);
}

.nav-menu a:hover {
    color: var(--text-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: transform var(--transition), opacity var(--transition);
}

/* Mobile nav */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        padding: var(--space-md) var(--space-lg) var(--space-lg);
        gap: var(--space-md);
    }

    .nav-menu.is-open {
        display: flex;
    }

    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding: var(--space-2xl) 0;
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
}

.hero-highlight {
    color: var(--accent);
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    font-family: var(--font-heading);
    font-style: italic;
    margin-bottom: var(--space-md);
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 40rem;
    margin-bottom: var(--space-xl);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    opacity: 0.3;
}

.hero-bg canvas {
    width: 100%;
    height: 100%;
}

.hero-bg-image {
    position: absolute;
    inset: 0;
    z-index: -1;
    opacity: 0.25;
    background-image: url('../assets/generated/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* Header transition on scroll */
.site-header {
    transition: transform 0.3s ease, background 0.3s ease;
}

.header-scrolled {
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header-scrolled .nav {
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

[data-theme="light"] .header-scrolled {
    background: rgba(250, 251, 252, 0.95);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.75rem;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

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

.btn-secondary:hover {
    background: var(--accent-glow);
    color: var(--accent-hover);
    transform: translateY(-1px);
}

/* --- Welcome Cards --- */
.welcome-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.welcome-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: var(--space-lg);
    transition: border-color var(--transition);
}

.welcome-card:hover {
    border-color: var(--border-light);
}

.welcome-card::before,
.transparency-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: inherit;
    background: radial-gradient(
        300px circle at var(--glow-x, 50%) var(--glow-y, 50%),
        var(--accent-glow),
        transparent 70%
    );
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
    z-index: 0;
}

.welcome-card:hover::before,
.transparency-card:hover::before {
    opacity: 1;
}

.welcome-card,
.transparency-card {
    position: relative;
    overflow: hidden;
}

.welcome-address {
    font-family: var(--font-heading);
    font-style: italic;
    color: var(--accent);
    margin-bottom: var(--space-md);
    font-size: 1.125rem;
}

/* --- Axiom List --- */
.axiom-list {
    list-style: none;
    max-width: var(--container-narrow);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.axiom-preview {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: border-color var(--transition), background var(--transition);
}

.axiom-preview:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
}

.axiom-number {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 2.5rem;
    text-align: center;
    line-height: 1;
    padding-top: 0.25rem;
}

.axiom-preview h3 {
    margin-bottom: var(--space-sm);
}

.axiom-preview p {
    color: var(--text-secondary);
}

/* --- Transparency Grid --- */
.transparency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
    gap: var(--space-lg);
}

.transparency-card {
    padding: var(--space-lg);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    transition: border-color var(--transition);
}

.transparency-card:hover {
    border-color: var(--border-light);
}

.transparency-card h3 {
    margin-bottom: var(--space-md);
}

.transparency-card p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

.link-arrow {
    font-weight: 600;
    font-size: 0.9375rem;
}

/* --- CTA Block --- */
.section-cta-block {
    background: var(--bg-secondary);
    text-align: center;
}

.section-cta-block .hero-actions {
    justify-content: center;
}

/* --- Footer --- */
.site-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-xl) 0 var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    position: relative;
    z-index: 2;
    background: var(--bg-primary);
}

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

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.footer-links h3 {
    font-size: 0.9375rem;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-links a {
    color: var(--text-secondary);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: var(--space-lg);
    text-align: center;
}

.footer-motto {
    margin-top: var(--space-sm);
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
}

/* --- Page Content (for inner pages) --- */
.page-header {
    padding: var(--space-2xl) 0 var(--space-xl);
    text-align: center;
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: visible;
    min-height: 40vh;
    display: flex;
    align-items: center;
}

/* Fixed background that stays anchored as content scrolls over */
.page-header-bg-fixed {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 55vh;
    background-size: cover;
    background-position: center;
    opacity: 0.35;
    z-index: 0;
    pointer-events: none;
}

/* Page header sits over the fixed bg, transparent */
.page-header {
    position: relative;
    z-index: 1;
    background: transparent;
}

/* Content sections scroll over the fixed background */
.page-content {
    position: relative;
    z-index: 2;
    background: rgba(10, 14, 23, 0.88);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    border-top: 1px solid var(--border);
}

[data-theme="light"] .page-content {
    background: rgba(250, 251, 252, 0.88);
}

/* Gradient fade from transparent to semi-opaque at top of content */
.page-content::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, rgba(10, 14, 23, 0.88));
    pointer-events: none;
    z-index: 3;
}

[data-theme="light"] .page-content::before {
    background: linear-gradient(to bottom, transparent, rgba(250, 251, 252, 0.88));
}

.page-header p {
    color: var(--text-secondary);
    max-width: var(--container-narrow);
    margin: var(--space-md) auto 0;
    font-size: 1.125rem;
}

.page-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    padding: var(--space-xl) var(--space-lg);
}

.page-content h2 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.page-content h3 {
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.page-content ul, .page-content ol {
    padding-left: var(--space-lg);
    color: var(--text-secondary);
}

.page-content li {
    margin-bottom: var(--space-sm);
}

.page-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: var(--space-lg);
    margin: var(--space-lg) 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-lg { margin-top: var(--space-lg); }
.mb-lg { margin-bottom: var(--space-lg); }

/* --- Print --- */
@media print {
    .site-header, .site-footer, .hero-bg, .nav-toggle, .btn {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }
}