/* ═══════════════════════════════════════════
   V A N T A — Stylesheet
   Black background / White theme
   ═══════════════════════════════════════════ */

:root {
    --bg: #000000;
    --bg-elevated: #0a0a0a;
    --bg-card: #111111;
    --text: #ffffff;
    --text-muted: #888888;
    --text-dim: #555555;
    --border: #1a1a1a;
    --border-hover: #333333;
    --accent: #ffffff;
    --accent-dim: #cccccc;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Space Grotesk', sans-serif;
    --transition: cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ─── Navigation ─── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.4s var(--transition);
}

.nav.scrolled {
    padding: 1rem 2rem;
    background: rgba(0, 0, 0, 0.95);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--text);
    text-decoration: none;
    transition: opacity 0.3s var(--transition);
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-links {
    display: flex;
    gap: 2.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    position: relative;
    padding: 0.25rem 0;
    transition: color 0.3s var(--transition);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text);
    transition: width 0.3s var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--text);
    margin: 6px 0;
    transition: all 0.3s var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ─── Page System ─── */
.page {
    display: none;
    min-height: 100vh;
    padding-top: 80px;
    animation: fadeIn 0.6s var(--transition) forwards;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Hero Section ─── */
.hero {
    min-height: calc(100vh - 80px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 700;
    letter-spacing: 0.25em;
    line-height: 1;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: slideUp 1s var(--transition) 0.2s forwards;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    font-weight: 300;
    max-width: 600px;
    margin-bottom: 3rem;
    opacity: 0;
    animation: slideUp 1s var(--transition) 0.4s forwards;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.5rem;
    border: 1px solid var(--text);
    color: var(--text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all 0.4s var(--transition);
    opacity: 0;
    animation: slideUp 1s var(--transition) 0.6s forwards;
}

.hero-cta:hover {
    background: var(--text);
    color: var(--bg);
}

.hero-cta svg {
    transition: transform 0.3s var(--transition);
}

.hero-cta:hover svg {
    transform: translateX(4px);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ─── Stats Section ─── */
.stats-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.4s var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--text), transparent);
    opacity: 0;
    transition: opacity 0.4s var(--transition);
}

.stat-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 0.75rem;
    background: linear-gradient(180deg, var(--text) 0%, var(--text-muted) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* ─── About Section ─── */
.about-section {
    padding: 6rem 2rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.8;
    font-weight: 300;
}

.about-text p + p {
    margin-top: 1.5rem;
}

/* ─── Content Pages ─── */
.content-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 4rem 2rem 6rem;
}

.content-page h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    text-align: center;
}

.content-page .page-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 3rem;
    font-size: 1rem;
}

/* ─── Terms Page ─── */
.terms-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 3rem;
}

.terms-content h2 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin: 2rem 0 1rem;
    letter-spacing: 0.05em;
}

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

.terms-content p {
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.terms-content ul {
    color: var(--text-muted);
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.terms-content li {
    margin-bottom: 0.5rem;
    line-height: 1.7;
}

.last-updated {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.875rem;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

/* ─── Footer ─── */
.footer {
    padding: 3rem 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.3em;
    margin-bottom: 1rem;
}

.footer-text {
    font-size: 0.875rem;
    color: var(--text-dim);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s var(--transition);
}

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

/* ─── Scroll Reveal ─── */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s var(--transition);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─── Divider ─── */
.divider {
    width: 40px;
    height: 1px;
    background: var(--text);
    margin: 2rem auto;
    opacity: 0.3;
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .nav {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background: var(--bg);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: right 0.4s var(--transition);
        z-index: 999;
    }

    .nav-links.open {
        right: 0;
    }

    .nav-links a {
        font-size: 1.25rem;
    }

    .mobile-menu-btn {
        display: block;
        z-index: 1001;
    }

    .hero {
        padding: 1.5rem;
    }

    .stats-section,
    .about-section {
        padding: 4rem 1.5rem;
    }

    .content-page {
        padding: 3rem 1.5rem 4rem;
    }

    .terms-content {
        padding: 2rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .stat-card {
        padding: 1.5rem 1rem;
    }

    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}