/* ============================================
   Sedai Labs Website Styles
   Modern, Clean, Mobile-First Design
   ============================================ */

/* CSS Variables - Color Palette from Gomoku Go */
:root {
    /* Brand Colors */
    --color-blue: #4a90d9;
    --color-red: #e94560;
    --color-green: #4ade80;
    --color-yellow: #fbbf24;

    /* Dark Theme (Primary) */
    --bg-primary: #0d0d1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #262640;
    --text-primary: #f2f7ff;
    --text-secondary: #a0aec0;
    --text-muted: #6b7280;

    /* UI Colors */
    --accent-primary: #4a90d9;
    --accent-secondary: #9a4ad9;
    --gradient-start: #4a90d9;
    --gradient-end: #9a4ad9;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 5rem;

    /* Typography */
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Russo One', 'Inter', sans-serif;

    /* Borders & Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(74, 144, 217, 0.3);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

/* Selection */
::selection {
    background: var(--accent-primary);
    color: var(--text-primary);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 13, 26, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    color: var(--text-primary);
    font-family: var(--font-display);
    font-size: 1.25rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
    transition: var(--transition-base);
}

.nav-logo:hover .logo-icon {
    color: var(--text-primary);
    transform: scale(1.05);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    transition: var(--transition-base);
}

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

.nav-link:hover::after {
    width: 100%;
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

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

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(13, 13, 26, 0.98);
        backdrop-filter: blur(20px);
        padding: var(--spacing-md);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: var(--transition-base);
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .nav-menu li {
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }

    .nav-link {
        display: block;
        padding: var(--spacing-sm) 0;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    overflow: hidden;
}

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

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(74, 144, 217, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(74, 144, 217, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.floating-tiles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.tile {
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    opacity: 0.15;
    animation: float 20s infinite ease-in-out;
}

.tile-blue {
    background: var(--color-blue);
    top: 15%;
    left: 10%;
    animation-delay: 0s;
}

.tile-red {
    background: var(--color-red);
    top: 25%;
    right: 15%;
    animation-delay: -5s;
}

.tile-green {
    background: var(--color-green);
    bottom: 30%;
    left: 15%;
    animation-delay: -10s;
}

.tile-yellow {
    background: var(--color-yellow);
    bottom: 20%;
    right: 10%;
    animation-delay: -15s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
    }
    75% {
        transform: translate(20px, 40px) scale(1.05);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.title-small {
    display: block;
    font-family: var(--font-body);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.title-main {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(3rem, 10vw, 5.5rem);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--color-blue) 50%, var(--color-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(10px);
    }
    60% {
        transform: translateX(-50%) translateY(5px);
    }
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 60px rgba(74, 144, 217, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-secondary);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-secondary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ============================================
   Sections
   ============================================ */
.section {
    padding: var(--spacing-2xl) 0;
}

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

.section-tag {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    color: var(--text-primary);
}

/* ============================================
   Games Section
   ============================================ */
.games-section {
    background: var(--bg-secondary);
}

.game-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

@media (max-width: 900px) {
    .game-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

.game-visual {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 560px;
    background: linear-gradient(145deg, #2a2a3a, #1a1a2a);
    border-radius: 40px;
    padding: 12px;
    box-shadow:
        0 50px 100px rgba(0, 0, 0, 0.5),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 25px;
    background: #0d0d1a;
    border-radius: 20px;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--bg-primary);
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.game-preview {
    padding: var(--spacing-lg);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 50px);
    grid-template-rows: repeat(3, 50px);
    gap: 10px;
}

.preview-tile {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    opacity: 0;
    animation: popIn 0.5s ease forwards;
    animation-delay: var(--delay);
    box-shadow:
        inset 0 -8px 20px rgba(0, 0, 0, 0.3),
        inset 0 8px 20px rgba(255, 255, 255, 0.2),
        0 4px 12px rgba(0, 0, 0, 0.3);
}

.preview-tile[data-color="blue"] { background: linear-gradient(145deg, #5ea3e6, #3d7cc4); }
.preview-tile[data-color="red"] { background: linear-gradient(145deg, #f05a73, #d13350); }
.preview-tile[data-color="green"] { background: linear-gradient(145deg, #5ce892, #3fc46e); }
.preview-tile[data-color="yellow"] { background: linear-gradient(145deg, #fcd04f, #e8a915); }

@keyframes popIn {
    0% {
        opacity: 0;
        transform: scale(0.3);
    }
    70% {
        transform: scale(1.1);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.game-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.3);
    border-radius: var(--radius-full);
    color: var(--color-green);
    font-size: 0.9rem;
    font-weight: 500;
}

.badge-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.game-info {
    max-width: 500px;
}

.game-tagline {
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.game-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 500px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(74, 144, 217, 0.3);
    transform: translateY(-2px);
}

.feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.game-cta {
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
    background: var(--bg-primary);
    overflow: hidden;
}

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

@media (max-width: 900px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-visual {
    display: flex;
    justify-content: center;
}

.about-graphic {
    position: relative;
    width: 300px;
    height: 300px;
}

.orbit-ring {
    position: absolute;
    border: 1px solid rgba(74, 144, 217, 0.2);
    border-radius: 50%;
    animation: spin 30s linear infinite;
}

.orbit-ring:nth-child(1) {
    inset: 0;
    animation-duration: 30s;
}

.orbit-ring:nth-child(2) {
    inset: 30px;
    animation-duration: 25s;
    animation-direction: reverse;
}

.orbit-ring:nth-child(3) {
    inset: 60px;
    animation-duration: 20s;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.center-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.logo-tiles {
    display: grid;
    grid-template-columns: repeat(2, 30px);
    gap: 8px;
}

.mini-tile {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    box-shadow:
        inset 0 -4px 10px rgba(0, 0, 0, 0.3),
        inset 0 4px 10px rgba(255, 255, 255, 0.2),
        0 4px 12px rgba(0, 0, 0, 0.3);
}

.mini-tile.blue { background: linear-gradient(145deg, #5ea3e6, #3d7cc4); }
.mini-tile.red { background: linear-gradient(145deg, #f05a73, #d13350); }
.mini-tile.green { background: linear-gradient(145deg, #5ce892, #3fc46e); }
.mini-tile.yellow { background: linear-gradient(145deg, #fcd04f, #e8a915); }

/* ============================================
   Contact Section
   ============================================ */
.contact-section {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    text-align: center;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.footer-logo .logo-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-primary);
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-links {
    margin-top: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

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

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

/* ============================================
   Legal Pages (Privacy Policy, Terms, etc.)
   ============================================ */
.legal-page {
    padding-top: 120px;
    padding-bottom: var(--spacing-2xl);
    min-height: 100vh;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
}

.legal-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.legal-header h1 {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    color: var(--text-primary);
    margin-top: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.legal-header .last-updated {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.legal-content section {
    margin-bottom: var(--spacing-xl);
}

.legal-content h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.legal-content h3 {
    font-size: 1.15rem;
    color: var(--text-primary);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.legal-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.legal-content ul {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
    line-height: 1.8;
}

.legal-content li {
    margin-bottom: var(--spacing-xs);
}

.legal-content a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.legal-content a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

.legal-content strong {
    color: var(--text-primary);
}

/* ============================================
   Responsive Adjustments
   ============================================ */
@media (max-width: 768px) {
    .hero {
        padding-top: 100px;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .phone-mockup {
        width: 240px;
        height: 480px;
    }

    .preview-grid {
        grid-template-columns: repeat(3, 40px);
        grid-template-rows: repeat(3, 40px);
        gap: 8px;
    }

    .preview-tile {
        width: 40px;
        height: 40px;
    }

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

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

    .phone-mockup {
        width: 200px;
        height: 400px;
        border-radius: 30px;
    }

    .phone-mockup::before {
        width: 60px;
        height: 20px;
    }

    .phone-screen {
        border-radius: 22px;
    }

    .preview-grid {
        grid-template-columns: repeat(3, 35px);
        grid-template-rows: repeat(3, 35px);
        gap: 6px;
    }

    .preview-tile {
        width: 35px;
        height: 35px;
    }
}

/* ============================================
   Animations & Effects
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Fade-in animation for sections */
.section {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.games-section { animation-delay: 0.1s; }
.about-section { animation-delay: 0.2s; }
.contact-section { animation-delay: 0.3s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}