/* DataStreak - Dark Theme CSS
   Based on Dantes Data Design System
   Pure black background with glass morphism */

/* ============================================
   CSS Variables (Design Tokens)
   ============================================ */
:root {
    /* Colors - Dark Theme */
    --background: #000000;
    --background-secondary: #0a0a0a;
    --surface: rgba(255, 255, 255, 0.03);
    --surface-hover: rgba(255, 255, 255, 0.08);
    --surface-active: rgba(255, 255, 255, 0.12);
    --glass: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-border-hover: rgba(255, 255, 255, 0.2);

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --text-dim: #4a4a4a;

    /* Accent Colors */
    --accent: #ffffff;
    --accent-glow: rgba(255, 255, 255, 0.3);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.4);
    --error: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;

    /* Sport Colors */
    --nba-color: #C9082A;
    --nfl-color: #013369;
    --nhl-color: #000000;
    --mlb-color: #002D72;
    --wnba-color: #FF6700;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-hero: clamp(3.5rem, 10vw, 6rem);

    /* Spacing */
    --nav-height: 80px;
    --container-max: 1400px;
    --section-padding: 120px;
    --card-padding: 48px;
    --card-padding-sm: 24px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-2xl: 32px;

    /* Shadows */
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.7);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 40px rgba(255, 255, 255, 0.1);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--surface-active);
}

/* Selection */
::selection {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

/* Links */
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

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

.text-hero {
    font-size: var(--font-size-hero);
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.text-gradient {
    background: linear-gradient(135deg, #ffffff, #cccccc, #999999);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-muted {
    color: var(--text-secondary);
}

.text-dim {
    color: var(--text-muted);
}

/* ============================================
   Layout
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

.section {
    padding: 80px 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--section-padding) 0;
    }
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.9);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

@media (min-width: 768px) {
    .navbar-inner {
        padding: 0 40px;
    }
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--text-primary);
}

.navbar-brand svg {
    width: 32px;
    height: 32px;
    filter: drop-shadow(0 0 20px rgba(255, 255, 255, 0.3));
}

.navbar-nav {
    display: none;
    align-items: center;
    gap: 8px;
}

@media (min-width: 768px) {
    .navbar-nav {
        display: flex;
    }
}

.nav-link {
    padding: 10px 20px;
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

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

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

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Dropdown Navigation */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.nav-dropdown-trigger svg {
    transition: transform var(--transition-base);
}

.nav-dropdown-trigger.active svg {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 240px;
    padding: 12px;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.nav-dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.nav-dropdown-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

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

.nav-dropdown-item.featured {
    color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    margin-top: 8px;
}

.nav-dropdown-item.featured:hover {
    background: rgba(16, 185, 129, 0.2);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
}

@media (min-width: 768px) {
    .mobile-menu-btn {
        display: none;
    }
}

.mobile-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 24px;
    transform: translateX(100%);
    transition: transform var(--transition-base);
    z-index: 999;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-nav-group {
    border-bottom: 1px solid var(--glass-border);
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 0;
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-nav-header svg {
    transition: transform var(--transition-base);
}

.mobile-nav-header svg.rotate-180 {
    transform: rotate(180deg);
}

.mobile-nav-items {
    padding-bottom: 16px;
}

.mobile-nav-items a {
    display: block;
    padding: 12px 16px;
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.mobile-nav-items a:hover {
    color: var(--text-primary);
    background: var(--surface);
}

.mobile-menu-footer {
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid var(--glass-border);
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.btn:hover {
    background: var(--surface-hover);
    border-color: var(--glass-border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--background);
    border-color: transparent;
}

.btn-primary:hover {
    background: #e0e0e0;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}

.btn-success {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(5, 150, 105, 0.1));
    border: 2px solid rgba(16, 185, 129, 0.4);
    color: var(--success);
}

.btn-success:hover {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.3), rgba(5, 150, 105, 0.2));
    box-shadow: 0 0 30px var(--success-glow);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
}

/* ============================================
   Cards
   ============================================ */
.card {
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: var(--card-padding-sm);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: var(--transition-base);
}

@media (min-width: 768px) {
    .card {
        padding: var(--card-padding);
    }
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    border-color: var(--glass-border-hover);
}

.card-3d {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card-3d:hover {
    transform: translateY(-12px) rotateX(2deg);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(145deg, var(--surface), var(--surface-hover));
    border-radius: var(--radius-lg);
    border: 1px solid var(--glass-border);
}

.card-icon svg {
    width: 28px;
    height: 28px;
    color: var(--text-primary);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.card-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--text-primary);
    font-weight: 600;
    transition: var(--transition-base);
}

.card-link:hover {
    gap: 12px;
}

.card-link svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.card-link:hover svg {
    transform: translateX(4px);
}

/* Featured Card */
.card-featured {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
    border: 2px solid rgba(255, 255, 255, 0.15);
}

.card-featured .card-icon {
    background: linear-gradient(135deg, var(--text-primary), #cccccc);
}

.card-featured .card-icon svg {
    color: var(--background);
}

/* ============================================
   Forms
   ============================================ */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-input:focus {
    outline: none;
    border-color: var(--glass-border-hover);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.05);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666666' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 44px;
}

/* ============================================
   Tables
   ============================================ */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid var(--glass-border);
}

.table th {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr {
    transition: var(--transition-base);
}

.table tbody tr:hover {
    background: var(--surface);
}

/* ============================================
   Badges & Tags
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    background: var(--surface);
    border: 1px solid var(--glass-border);
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.badge-error {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--error);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.badge-hot {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(249, 115, 22, 0.2));
    border-color: rgba(239, 68, 68, 0.4);
    color: #ff6b6b;
    animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
    }
    50% {
        box-shadow: 0 0 20px rgba(239, 68, 68, 0.5);
    }
}

/* ============================================
   Sport Pills
   ============================================ */
.sport-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.sport-pill {
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background: var(--surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition-base);
}

.sport-pill:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.sport-pill.active {
    background: var(--text-primary);
    color: var(--background);
    border-color: transparent;
}

/* ============================================
   Stats Display
   ============================================ */
.stat-card {
    text-align: center;
    padding: 32px 24px;
}

.stat-value {
    font-size: var(--font-size-4xl);
    font-weight: 900;
    background: linear-gradient(135deg, #ffffff, #cccccc, #999999);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 8px;
}

.stat-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Hit Rate Display */
.hit-rate {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 64px;
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    font-weight: 700;
    border-radius: var(--radius-md);
}

.hit-rate-high {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(5, 150, 105, 0.1));
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: var(--success);
}

.hit-rate-hot {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(249, 115, 22, 0.2));
    border: 1px solid rgba(239, 68, 68, 0.4);
    color: #ff6b6b;
}

/* ============================================
   Progress Bar
   ============================================ */
.progress {
    height: 8px;
    background: var(--surface);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--text-secondary), var(--text-primary));
    border-radius: var(--radius-sm);
    transition: width var(--transition-slow);
}

/* ============================================
   Loading States
   ============================================ */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--glass-border);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    color: var(--text-muted);
}

/* ============================================
   Empty States
   ============================================ */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 24px;
    text-align: center;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 24px;
    color: var(--text-dim);
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 8px;
}

.empty-state-description {
    color: var(--text-muted);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: 160px 0 120px;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-hero);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.6;
}

/* ============================================
   Grid System
   ============================================ */
.grid {
    display: grid;
    gap: 24px;
}

@media (min-width: 768px) {
    .grid {
        gap: 32px;
    }

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

    .grid-cols-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid {
        gap: 48px;
    }

    .grid-cols-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

.col-span-2 {
    grid-column: span 2;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--glass-border);
    text-align: center;
    color: var(--text-muted);
}

/* ============================================
   Auth Pages
   ============================================ */
.auth-container {
    max-width: 440px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.auth-card {
    padding: 40px;
}

.auth-header {
    text-align: center;
    margin-bottom: 32px;
}

.auth-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 8px;
}

.auth-subtitle {
    color: var(--text-secondary);
}

.auth-divider {
    display: flex;
    align-items: center;
    gap: 16px;
    margin: 24px 0;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

.auth-footer {
    text-align: center;
    margin-top: 24px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--text-primary);
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* OAuth Buttons */
.btn-oauth {
    width: 100%;
    margin-bottom: 12px;
    justify-content: center;
}

.btn-discord {
    background: #5865F2;
    border-color: #5865F2;
}

.btn-discord:hover {
    background: #4752C4;
    border-color: #4752C4;
}

.btn-google {
    background: var(--surface);
    border-color: var(--glass-border);
}

.btn-google:hover {
    background: var(--surface-hover);
}

/* ============================================
   Error Messages
   ============================================ */
.alert {
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ff6b6b;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--success);
}

/* ============================================
   Live Indicator
   ============================================ */
.live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--success);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.live-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.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;
}

.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-center {
    justify-content: center;
}

.gap-2 { gap: 8px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }

.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mb-8 { margin-bottom: 32px; }

.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }

.text-center { text-align: center; }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.w-full { width: 100%; }

/* Page content offset for fixed navbar */
.page-content {
    padding-top: var(--nav-height);
    min-height: calc(100vh - var(--nav-height));
}