/* Modern Codle Landing Page - Beautiful Design */

/* Reset and base styles */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Modern Color Palette */
    --primary: #0A0A0B;
    --secondary: #1A1A1D;
    --tertiary: #2A2A2D;
    --accent: #FF8C42;
    --accent-light: #FFA562;
    --accent-glow: rgba(255, 140, 66, 0.3);

    /* Game Colors */
    --success: #6AAA64;
    --warning: #C9B458;
    --muted: #787C7E;

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-muted: rgba(255, 255, 255, 0.6);
    --border: rgba(255, 255, 255, 0.12);

    /* Modern Gradients */
    --gradient-primary: linear-gradient(135deg, #FF8C42 0%, #FF6B35 100%);
    --gradient-secondary: linear-gradient(135deg, #1A1A1D 0%, #2A2A2D 100%);
    --gradient-hero: radial-gradient(ellipse at center top, rgba(255, 140, 66, 0.15) 0%, transparent 70%);

    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.16);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 40px var(--accent-glow);

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition-fast);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.logo-text {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.02em;
}

/* Desktop Navigation */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

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


.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(70px + var(--space-2xl)) 0 var(--space-2xl);
    background: var(--primary);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: var(--gradient-hero);
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
    width: 100%;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--space-lg);
    letter-spacing: -0.03em;
}

.hero-title {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Game Demo */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.game-demo {
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    max-width: 420px;
    width: 100%;
    position: relative;
}

.game-demo::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: linear-gradient(135deg, var(--accent-glow), transparent, var(--accent-glow));
    border-radius: var(--radius-xl);
    z-index: -1;
    opacity: 0.5;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border);
}

.game-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.game-streak {
    background: rgba(255, 140, 66, 0.2);
    color: var(--accent);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.terminal-hint {
    background: var(--primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    overflow: hidden;
    margin-bottom: var(--space-lg);
}

.terminal-header {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--space-sm);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}

.dots {
    display: flex;
    gap: 6px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca3f; }

.terminal-content {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
}

.prompt {
    color: var(--success);
    font-weight: 600;
}

.command {
    color: var(--accent);
    margin-left: var(--space-xs);
}

.game-grid {
    display: grid;
    gap: 8px;
    max-width: 320px;
    margin: 0 auto;
}

.word-row {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
}

.letter {
    aspect-ratio: 1;
    background: rgba(255, 255, 255, 0.08);
    border: 2px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.letter.correct {
    background: var(--success);
    border-color: var(--success);
    color: white;
    box-shadow: 0 2px 8px rgba(106, 170, 100, 0.3);
}

.letter.wrong-pos {
    background: var(--warning);
    border-color: var(--warning);
    color: white;
    box-shadow: 0 2px 8px rgba(201, 180, 88, 0.3);
}

.letter.wrong {
    background: var(--muted);
    border-color: var(--muted);
    color: white;
}

.word-row.winner .letter {
    animation: letter-bounce 0.6s ease-out;
}

.word-row.winner .letter:nth-child(1) { animation-delay: 0s; }
.word-row.winner .letter:nth-child(2) { animation-delay: 0.1s; }
.word-row.winner .letter:nth-child(3) { animation-delay: 0.2s; }
.word-row.winner .letter:nth-child(4) { animation-delay: 0.3s; }
.word-row.winner .letter:nth-child(5) { animation-delay: 0.4s; }

@keyframes letter-bounce {
    0% { transform: scale(1); }
    50% { transform: scale(1.1) rotateZ(5deg); }
    100% { transform: scale(1); }
}

/* Sections */
section {
    padding: var(--space-3xl) 0;
}

.section-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--space-md);
    line-height: 1.2;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    background: var(--secondary);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--space-lg);
    display: block;
    filter: drop-shadow(0 2px 8px rgba(255, 140, 66, 0.3));
}

.feature-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* How to Play Section */
.how-to-play {
    background: var(--primary);
}

.rules-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

.rules-demo {
    text-align: center;
}

.demo-word {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.demo-letter {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.8rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    transition: var(--transition);
}

.demo-letter.correct {
    background: var(--success);
    border-color: var(--success);
    color: white;
    box-shadow: 0 4px 16px rgba(106, 170, 100, 0.4);
}

.demo-letter.wrong-pos {
    background: var(--warning);
    border-color: var(--warning);
    color: white;
    box-shadow: 0 4px 16px rgba(201, 180, 88, 0.4);
}

.demo-letter.wrong {
    background: var(--muted);
    border-color: var(--muted);
    color: white;
    box-shadow: 0 4px 16px rgba(120, 124, 126, 0.4);
}

.demo-explanation {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.rule-item {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    text-align: left;
    padding: var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.rule-color {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.rule-color.correct { background: var(--success); }
.rule-color.wrong-pos { background: var(--warning); }
.rule-color.wrong { background: var(--muted); }

.rules-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.rule-step {
    display: flex;
    gap: var(--space-lg);
    align-items: flex-start;
    padding: var(--space-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.rule-step:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-glow);
}

.step-content h4 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    color: var(--text-primary);
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 1rem;
}

/* About Section */
.about {
    background: var(--secondary);
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    line-height: 1.8;
}

.stats {
    display: flex;
    justify-content: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

/* CTA Section */
.cta {
    background: var(--primary);
    text-align: center;
    position: relative;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 2px;
    background: var(--gradient-primary);
}

.cta-content {
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--space-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-light) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.cta-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.7;
}

.cta-actions {
    display: flex;
    gap: var(--space-lg);
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--secondary);
    border-top: 1px solid var(--border);
    padding: var(--space-2xl) 0 var(--space-lg);
}

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

.footer-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--text-primary);
}

.footer-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-text {
    color: var(--text-secondary);
    padding: var(--space-xs) 0;
    display: block;
}

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

/* Mobile Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(10, 10, 11, 0.98);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: var(--space-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        flex-direction: column;
        gap: var(--space-lg);
    }

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

    .nav-link {
        font-size: 1.1rem;
        padding: var(--space-sm) 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }


    .nav-toggle {
        display: flex;
    }

    .nav-toggle.nav-open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.nav-open span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.nav-open span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .hero-text {
        text-align: center;
    }

    .rules-content {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .demo-letter {
        width: 50px;
        height: 50px;
        font-size: 1.4rem;
    }

}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }


    .demo-letter {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }

    .game-grid {
        max-width: 280px;
    }

    .letter {
        font-size: 1.1rem;
    }
}

/* Animations and Effects */
@media (prefers-reduced-motion: no-preference) {
    .feature-card {
        animation: fade-up 0.6s ease-out;
        animation-fill-mode: both;
    }

    .feature-card:nth-child(1) { animation-delay: 0.1s; }
    .feature-card:nth-child(2) { animation-delay: 0.2s; }
    .feature-card:nth-child(3) { animation-delay: 0.3s; }
    .feature-card:nth-child(4) { animation-delay: 0.4s; }

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

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --border: rgba(255, 255, 255, 0.4);
        --text-secondary: rgba(255, 255, 255, 0.95);
    }
}

/* Focus styles for accessibility */
.btn:focus-visible,
.nav-link:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}