/* ========================================
   LN Djital Legal Site — Style System
   Based on Stitch "Lumina Digital" Design
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
    --bg: #080e1d;
    --surface: #0c1324;
    --surface-container: #12192b;
    --surface-container-high: #171f33;
    --surface-container-highest: #1d253b;
    --surface-bright: #222c43;

    --primary: #bd9dff;
    --primary-dim: #8a4cfc;
    --primary-container: #b28cff;
    --secondary: #9492ff;
    --secondary-container: #3323cc;
    --tertiary: #ff97b2;
    --tertiary-dim: #f17799;
    --error: #ff6e84;

    --on-bg: #e0e5fb;
    --on-surface: #e0e5fb;
    --on-surface-variant: #a5aabf;
    --outline: #6f7588;
    --outline-variant: #424859;

    --gradient-primary: linear-gradient(135deg, #7C3AED, #4F46E5);
    --gradient-glow: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(124,58,237,0.15), transparent);

    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--on-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--primary-container); }

img { max-width: 100%; display: block; }

.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Header --- */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 1rem 0;
    transition: all 0.3s ease;
    background: transparent;
}
.header.scrolled {
    background: rgba(8,14,29,0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(66,72,89,0.15);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--on-bg);
    letter-spacing: -0.02em;
}
.logo span { color: var(--primary); }

.nav {
    display: flex;
    gap: 0.25rem;
}
.nav-link {
    color: var(--on-surface-variant);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    transition: all 0.2s;
}
.nav-link:hover, .nav-link.active {
    color: var(--on-surface);
    background: rgba(189,157,255,0.08);
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.mobile-menu-btn span {
    width: 22px; height: 2px;
    background: var(--on-surface-variant);
    transition: all 0.3s;
    border-radius: 2px;
}
.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); }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.25s ease;
    text-decoration: none;
}
.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(124,58,237,0.3);
}
.btn-primary:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 28px rgba(124,58,237,0.45);
}
.btn-ghost {
    background: rgba(189,157,255,0.08);
    color: var(--on-surface);
    border: 1px solid rgba(66,72,89,0.3);
}
.btn-ghost:hover {
    background: rgba(189,157,255,0.14);
    color: var(--on-surface);
}
.btn-sm { padding: 0.5rem 1rem; font-size: 0.8125rem; }

/* --- Hero --- */
.hero {
    position: relative;
    padding: 10rem 0 5rem;
    text-align: center;
    overflow: hidden;
}
.hero-bg-glow {
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 120%;
    height: 100%;
    background: radial-gradient(ellipse 50% 50% at 50% 20%, rgba(124,58,237,0.12), transparent 70%);
    pointer-events: none;
}
.hero-inner { position: relative; z-index: 1; }

.hero-badge {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--primary);
    background: rgba(124,58,237,0.1);
    border: 1px solid rgba(124,58,237,0.2);
    padding: 0.375rem 1rem;
    border-radius: 9999px;
    margin-bottom: 1.5rem;
}
.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-subtitle {
    font-size: 1.125rem;
    color: var(--on-surface-variant);
    max-width: 580px;
    margin: 0 auto 2rem;
    line-height: 1.7;
}
.hero-actions {
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Sections --- */
.section {
    padding: 5rem 0;
}
.section-alt {
    background: var(--surface);
}
.section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    color: var(--primary);
    text-align: center;
    margin-bottom: 0.75rem;
}
.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.25rem);
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
}
.section-desc {
    text-align: center;
    color: var(--on-surface-variant);
    max-width: 520px;
    margin: 0 auto 2.5rem;
}

/* --- Glass Cards --- */
.glass-card {
    background: rgba(18,25,43,0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(66,72,89,0.15);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: all 0.3s ease;
}
.glass-card:hover {
    border-color: rgba(189,157,255,0.2);
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

/* --- Features --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.feature-card { text-align: left; }
.feature-icon {
    width: 44px; height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(124,58,237,0.12);
    color: var(--primary);
    margin-bottom: 1.25rem;
}
.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}
.feature-card p {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    line-height: 1.65;
}

/* --- Platforms --- */
.platforms-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    margin-top: 1.5rem;
}
.platform-chip {
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.625rem 1.25rem;
    background: var(--surface-container-high);
    border: 1px solid rgba(66,72,89,0.2);
    border-radius: 9999px;
    color: var(--on-surface);
    transition: all 0.2s;
}
.platform-chip:hover {
    background: var(--surface-container-highest);
    border-color: rgba(189,157,255,0.2);
}

/* --- Legal Cards --- */
.legal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.legal-card {
    text-decoration: none;
    color: var(--on-surface);
    text-align: left;
    display: flex;
    flex-direction: column;
}
.legal-card:hover { color: var(--on-surface); }
.legal-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}
.legal-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.legal-card p {
    font-size: 0.875rem;
    color: var(--on-surface-variant);
    line-height: 1.6;
    flex: 1;
}
.legal-link {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--primary);
    transition: all 0.2s;
}
.legal-card:hover .legal-link { color: var(--primary-container); }
.legal-card--danger:hover { border-color: rgba(255,110,132,0.3); }
.legal-link--danger { color: var(--error) !important; }
.legal-card--danger:hover .legal-link--danger { color: var(--tertiary) !important; }

/* --- Legal Page Content --- */
.legal-page {
    padding: 8rem 0 4rem;
}
.legal-content {
    max-width: 800px;
    margin: 0 auto;
}
.legal-content h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}
.legal-content .last-updated {
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
    margin-bottom: 2.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid rgba(66,72,89,0.2);
}
.legal-content h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--on-surface);
}
.legal-content h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-top: 1.75rem;
    margin-bottom: 0.75rem;
    color: var(--on-surface);
}
.legal-content p {
    font-size: 0.9375rem;
    color: var(--on-surface-variant);
    margin-bottom: 1rem;
    line-height: 1.75;
}
.legal-content ul, .legal-content ol {
    margin: 0.75rem 0 1rem 1.5rem;
    color: var(--on-surface-variant);
    font-size: 0.9375rem;
    line-height: 1.75;
}
.legal-content li { margin-bottom: 0.375rem; }
.legal-content strong { color: var(--on-surface); font-weight: 600; }
.legal-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.legal-content a:hover { color: var(--primary-container); }

.legal-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0 1.5rem;
    font-size: 0.875rem;
}
.legal-content th,
.legal-content td {
    text-align: left;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(66,72,89,0.2);
}
.legal-content th {
    font-weight: 600;
    color: var(--on-surface);
    background: var(--surface-container);
}
.legal-content td {
    color: var(--on-surface-variant);
}

.legal-content .highlight-box {
    background: var(--surface-container);
    border-left: 3px solid var(--primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}
.legal-content .highlight-box p { margin-bottom: 0; }

.legal-content .warning-box {
    background: rgba(255,110,132,0.06);
    border-left: 3px solid var(--error);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: 1.25rem 1.5rem;
    margin: 1.5rem 0;
}
.legal-content .warning-box p { margin-bottom: 0; color: var(--tertiary); }

.legal-content .steps-list {
    list-style: none;
    margin-left: 0;
    counter-reset: step;
}
.legal-content .steps-list li {
    counter-increment: step;
    padding-left: 2.5rem;
    position: relative;
    margin-bottom: 0.75rem;
}
.legal-content .steps-list li::before {
    content: counter(step);
    position: absolute;
    left: 0;
    width: 1.75rem;
    height: 1.75rem;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

/* --- Footer --- */
.footer {
    padding: 2.5rem 0;
    border-top: 1px solid rgba(66,72,89,0.15);
}
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1.5rem;
}
.footer-info {
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
    margin-top: 0.25rem;
}
.footer-copy {
    font-size: 0.75rem;
    color: var(--outline);
    margin-top: 0.25rem;
}
.footer-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}
.footer-links a {
    font-size: 0.8125rem;
    color: var(--on-surface-variant);
}
.footer-links a:hover { color: var(--primary); }
.footer-right {
    font-size: 0.8125rem;
    color: var(--outline);
}
.footer-right a { color: var(--primary); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0; right: 0;
        background: rgba(8,14,29,0.95);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid rgba(66,72,89,0.15);
    }
    .nav.open { display: flex; }
    .mobile-menu-btn { display: flex; }
    .btn-sm { display: none; }

    .features-grid,
    .legal-grid {
        grid-template-columns: 1fr;
    }
    .hero { padding: 7rem 0 3rem; }
    .hero-title { font-size: 2rem; }
    .section { padding: 3rem 0; }

    .footer-inner { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
    .platforms-row { gap: 0.5rem; }
    .platform-chip { font-size: 0.8125rem; padding: 0.5rem 1rem; }
}