/* ====================================
   BitForge - Main Styles
   ==================================== */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a25;
    --bg-elevated: #1e1e2a;
    --accent-primary: #3b82f6;
    --accent-secondary: #6366f1;
    --accent-glow: #60a5fa;
    --accent-success: #22c55e;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #2a2a3a;
    --border-light: #3a3a4a;
    --glass: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.3);
    --shadow-success-glow: 0 0 15px rgba(34, 197, 94, 0.4);
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-slow: 0.3s ease;
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-modal: 500;
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --glass: rgba(0, 0, 0, 0.02);
    --glass-border: rgba(0, 0, 0, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
}

::selection {
    background: var(--accent-primary);
    color: white;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

h1,
h2,
h3 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: var(--text-3xl);
}

h2 {
    font-size: var(--text-2xl);
}

h3 {
    font-size: var(--text-xl);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
}

kbd {
    display: inline-block;
    padding: var(--space-1) var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.header {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

[data-theme="light"] .header {
    background: rgba(248, 250, 252, 0.85);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-3) var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: var(--text-xl);
}

.logo-icon {
    font-size: var(--text-2xl);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.nav-link.active {
    color: var(--accent-primary);
    background: rgba(59, 130, 246, 0.1);
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 160px;
    padding: var(--space-2);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.dropdown-item {
    display: block;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    color: var(--text-primary);
    background: var(--glass);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: var(--text-lg);
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border);
}

.theme-icon-light {
    display: none;
}

[data-theme="light"] .theme-icon-dark {
    display: none;
}

[data-theme="light"] .theme-icon-light {
    display: block;
}

.lang-selector {
    position: relative;
}

.lang-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-primary);
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 160px;
    max-height: 400px;
    overflow-y: auto;
    padding: var(--space-2);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.lang-selector:hover .lang-dropdown,
.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.lang-option {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-secondary);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    white-space: nowrap;
}

.lang-option:hover {
    color: var(--text-primary);
    background: var(--glass);
}

/* RTL Support */
[dir="rtl"] .header-container {
    flex-direction: row-reverse;
}

[dir="rtl"] .nav-list {
    flex-direction: row-reverse;
}

[dir="rtl"] .lang-dropdown {
    right: auto;
    left: 0;
}

[dir="rtl"] .dropdown-menu {
    right: auto;
    left: 0;
}

body.rtl {
    direction: rtl;
    text-align: right;
}

.main {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
}

.section {
    display: none;
    animation: fadeIn var(--transition-slow);
}

.section.section-active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.section-header {
    text-align: center;
    margin-bottom: var(--space-10);
}

.section-title {
    font-size: var(--text-3xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
}

.hidden {
    display: none !important;
}