/* ================================
   NodakNikita - Main Styles
   Modern, clean design with purple accents
   ================================ */

/* ===== CSS Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-purple: #667eea;
    --primary-purple-dark: #5568d3;
    --secondary-purple: #764ba2;
    --accent-purple: #8b5cf6;

    --text-dark: #1a202c;
    --text-medium: #4a5568;
    --text-light: #718096;

    --bg-white: #ffffff;
    --bg-light: #f7fafc;
    --bg-lighter: #edf2f7;

    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;

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

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
    letter-spacing: -0.025em;
}

h2 {
    font-size: 2rem;
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-medium);
}

a {
    color: var(--primary-purple);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-purple-dark);
}

code {
    font-family: var(--font-mono);
    background: var(--bg-lighter);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--secondary-purple);
}

/* ===== Navigation Bar ===== */
nav {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition-base);
}

nav.scrolled {
    box-shadow: var(--shadow-md);
}

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

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: transform var(--transition-base);
}

.nav-brand:hover {
    color: var(--primary-purple);
    transform: translateY(-2px);
}

.nav-brand-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-medium);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 6px;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a:hover {
    color: var(--primary-purple);
    background: var(--bg-lighter);
}

.nav-links a.active {
    color: var(--primary-purple);
    font-weight: 600;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-purple);
    border-radius: 50%;
}

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

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* ===== Layout Structure ===== */
.main-content {
    min-height: calc(100vh - 70px);
}

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

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary-purple) 0%, var(--secondary-purple) 100%);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
}

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

.hero h1 {
    color: white;
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    text-decoration: none;
    font-family: var(--font-sans);
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: var(--primary-purple-dark);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-purple);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-purple);
    border: 2px solid var(--primary-purple);
}

.btn-outline:hover {
    background: var(--primary-purple);
    color: white;
}

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

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

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

.section-header h2 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--primary-purple), var(--secondary-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Cards (simplified, modern version) ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-purple);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    display: block;
}

.card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

.card p {
    color: var(--text-medium);
    margin-bottom: var(--spacing-md);
}

/* ===== Game Container ===== */
.game-container {
    background: var(--bg-white);
    border-radius: 12px;
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    margin: var(--spacing-xl) 0;
}

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

.game-controls {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.game-info {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.game-stat {
    text-align: center;
}

.game-stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.game-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-purple);
}

/* ===== Info Box ===== */
.info-box {
    background: var(--bg-lighter);
    border-left: 4px solid var(--primary-purple);
    padding: var(--spacing-md);
    border-radius: 8px;
    margin: var(--spacing-lg) 0;
}

.info-box h4 {
    margin-bottom: var(--spacing-xs);
    color: var(--primary-purple);
}

.info-box p {
    margin-bottom: var(--spacing-xs);
}

.info-box code {
    display: block;
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: white;
    border-radius: 4px;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-white);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
    color: var(--text-light);
}

.footer p {
    color: var(--text-light);
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .nav-container {
        flex-wrap: wrap;
        height: auto;
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm) 0;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        padding: var(--spacing-sm);
    }

    .nav-links a.active::after {
        display: none;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .game-container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== Accessibility ===== */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
    outline: 2px solid var(--primary-purple);
    outline-offset: 2px;
}