/* Shared oleksyuk design system for the static site pages. */

:root {
    --oleksyuk-dark: #090b10;
    --oleksyuk-surface: rgba(16, 20, 28, 0.84);
    --oleksyuk-card: rgba(22, 27, 37, 0.88);
    --oleksyuk-hover: rgba(31, 38, 52, 0.96);
    --oleksyuk-border: rgba(139, 151, 173, 0.2);
    --oleksyuk-glow: rgba(126, 144, 208, 0.16);

    --text-primary: #eef2ff;
    --text-secondary: #aeb7ca;
    --text-muted: #788093;

    --accent-primary: #8ea1d8;
    --accent-secondary: #aab7e4;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --accent-glow: rgba(126, 144, 208, 0.34);

    --success: #6ee7b7;
    --danger: #fb7185;
    --warning: #fbbf24;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.28);
    --shadow-md: 0 14px 34px rgba(0, 0, 0, 0.34);
    --shadow-lg: 0 22px 60px rgba(0, 0, 0, 0.44);
    --shadow-glow: 0 0 36px var(--accent-glow);
}

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

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

body {
    font-family: 'Space Mono', 'JetBrains Mono', 'Fira Code', monospace;
    background-color: var(--oleksyuk-dark);
    background-image:
        radial-gradient(circle at 15% 20%, rgba(113, 131, 186, 0.18), transparent 30%),
        radial-gradient(circle at 80% 16%, rgba(162, 178, 214, 0.08), transparent 24%),
        radial-gradient(circle at 68% 80%, rgba(82, 94, 126, 0.16), transparent 24%),
        linear-gradient(145deg, rgba(12, 15, 21, 0.98), rgba(7, 9, 13, 1)),
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: auto, auto, auto, auto, 32px 32px, 32px 32px;
    background-position: center, center, center, center, center, center;
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Orbitron', 'Space Mono', sans-serif;
    font-weight: 700;
    letter-spacing: 0.02em;
    line-height: 1.2;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--text-secondary);
    margin-bottom: var(--space-md);
}

a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

code {
    padding: 0.15rem 0.35rem;
    border-radius: 0.4rem;
    background: rgba(255, 255, 255, 0.06);
    color: #dbe4ff;
}

.logo-zero {
    font-size: 1.15em;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 10px rgba(126, 144, 208, 0.4));
}

.page-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-lg);
}

.container {
    width: 100%;
    max-width: 1120px;
    margin: 0 auto;
}

.card {
    background: var(--oleksyuk-card);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card-glass {
    background: linear-gradient(180deg, rgba(18, 24, 36, 0.78), rgba(10, 14, 22, 0.92));
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow: var(--shadow-lg);
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    width: 100%;
    margin-top: var(--space-xl);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--oleksyuk-card);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.nav-item:hover {
    background: var(--oleksyuk-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
    color: var(--text-primary);
}

.nav-item:hover::before {
    opacity: 1;
}

.nav-item-icon {
    font-size: 2rem;
    margin-bottom: var(--space-xs);
}

.nav-item-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
}

.nav-item-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--oleksyuk-card);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn:hover {
    background: var(--oleksyuk-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--accent-gradient);
    border: none;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: var(--shadow-glow);
}

.btn-ghost {
    background: transparent;
    border: 1px solid var(--oleksyuk-border);
}

.btn-ghost:hover {
    background: var(--oleksyuk-card);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-lg) var(--space-2xl);
    font-size: 1.125rem;
}

button:disabled, .btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
}

.input-row {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

input, textarea, select {
    width: 100%;
    padding: var(--space-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: all var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(126, 144, 208, 0.18);
}

input::placeholder, textarea::placeholder {
    color: var(--text-muted);
}

.menu-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    width: 100%;
    max-width: 400px;
    margin: var(--space-xl) auto;
}

.menu-link {
    display: block;
    padding: var(--space-md) var(--space-lg);
    background: var(--oleksyuk-card);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    text-align: center;
    font-family: 'Orbitron', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.menu-link:hover {
    background: var(--oleksyuk-hover);
    transform: translateX(8px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-sm);
}

.menu-link.back-link {
    margin-top: var(--space-md);
    background: transparent;
    border-style: dashed;
    opacity: 0.8;
}

.menu-link.back-link:hover {
    opacity: 1;
    transform: translateX(-8px);
}

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

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    background: linear-gradient(135deg, #f3f6ff, #ccd6f4, #8ea1d8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.game-container {
    background: var(--oleksyuk-card);
    border: 1px solid var(--oleksyuk-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

.balance-display {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(0, 0, 0, 0.35);
    border-radius: var(--radius-xl);
    font-family: 'Orbitron', sans-serif;
    font-size: 1.125rem;
    color: var(--success);
    margin-bottom: var(--space-lg);
}

.balance-display::before {
    content: '💰';
}

.result-message {
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    margin-top: var(--space-lg);
}

.result-message.win {
    background: rgba(74, 222, 128, 0.15);
    color: var(--success);
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.result-message.lose {
    background: rgba(248, 113, 113, 0.15);
    color: var(--danger);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 0 5px var(--accent-glow), 0 0 10px var(--accent-glow);
    }
    50% {
        box-shadow: 0 0 20px var(--accent-glow), 0 0 30px var(--accent-glow);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease forwards;
}

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

.animate-slide-in {
    animation: slideIn 0.4s ease forwards;
}

.stagger-1 { animation-delay: 0.1s; opacity: 0; }
.stagger-2 { animation-delay: 0.15s; opacity: 0; }
.stagger-3 { animation-delay: 0.2s; opacity: 0; }
.stagger-4 { animation-delay: 0.25s; opacity: 0; }
.stagger-5 { animation-delay: 0.3s; opacity: 0; }
.stagger-6 { animation-delay: 0.35s; opacity: 0; }
.stagger-7 { animation-delay: 0.4s; opacity: 0; }
.stagger-8 { animation-delay: 0.45s; opacity: 0; }

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--oleksyuk-dark);
}

::-webkit-scrollbar-thumb {
    background: rgba(126, 144, 208, 0.28);
    border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-accent { color: var(--accent-primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }

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

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

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.w-full { width: 100%; }

.hidden { display: none !important; }

@media (max-width: 768px) {
    html { font-size: 14px; }

    .page-title { font-size: 2rem; }

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

    .card-glass {
        padding: var(--space-lg);
    }

    .input-row {
        flex-direction: column;
    }
}

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

    .page-title { font-size: 1.75rem; }

    .page-wrapper {
        padding: var(--space-md);
    }
}