/* ============================================
   0xAddress Training Center - Main Styles
   ============================================ */

:root {
    --primary: #667eea;
    --primary-light: #7c8ff4;
    --primary-dark: #5a67d8;
    --secondary: #764ba2;
    --accent: #f97316;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --bg: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-lighter: #252542;
    --bg-input: #2a2a4a;
    
    --text: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #6b7280;
    
    --border: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
    
    --level-basic: #10b981;
    --level-intermediate: #f59e0b;
    --level-advanced: #ef4444;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.5);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.6);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg: #f5f7fa;
    --bg-card: #ffffff;
    --bg-lighter: #eef1f5;
    --bg-input: #e2e8f0;
    --text: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border: rgba(0, 0, 0, 0.08);
    --border-light: rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.12);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
    transition: background var(--transition), color var(--transition);
}

/* Background Effects */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

[data-theme="light"] .bg-grid {
    background-image: 
        linear-gradient(rgba(102, 126, 234, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(102, 126, 234, 0.08) 1px, transparent 1px);
}

.bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.15;
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 { top: -200px; right: -200px; background: var(--primary); }
.bg-glow-2 { bottom: -200px; left: -200px; background: var(--secondary); }
[data-theme="light"] .bg-glow { opacity: 0.08; }

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    background: rgba(15, 15, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}

[data-theme="light"] nav { background: rgba(255, 255, 255, 0.9); }

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: white;
}

.logo-text { font-weight: 700; font-size: 1.25rem; }

.nav-controls { display: flex; align-items: center; gap: 12px; }

.nav-btn {
    background: var(--bg-lighter);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 10px 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition);
}

.nav-btn:hover {
    background: var(--bg-input);
    color: var(--text);
    border-color: var(--primary);
}

.nav-btn.primary {
    background: var(--gradient);
    border-color: transparent;
    color: white;
}

.nav-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.nav-btn.connected {
    background: rgba(16, 185, 129, 0.15);
    border-color: var(--success);
    color: var(--success);
}

.nav-btn.connected:hover {
    background: rgba(16, 185, 129, 0.25);
}

/* Wallet Address Display */
.wallet-address {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
}

/* Hero Section */
.hero {
    padding: 140px 24px 60px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-content { max-width: 800px; margin: 0 auto; }

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(102, 126, 234, 0.1);
    border: 1px solid rgba(102, 126, 234, 0.3);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 13px;
    margin-bottom: 24px;
    color: var(--primary);
}

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

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero h1 .gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 48px; }
.stat { text-align: center; }

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

/* Accordion Filter Section */
.filters-section {
    max-width: 1200px;
    margin: 0 auto 40px;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.filters-accordion {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.filters-toggle {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 28px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text);
    font-family: 'Inter', sans-serif;
    transition: all var(--transition);
}

.filters-toggle:hover { background: var(--bg-lighter); }

.filters-toggle-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.filters-toggle-left i { font-size: 20px; color: var(--primary); }
.filters-toggle-left span { font-size: 16px; font-weight: 600; }

.filters-toggle-right { display: flex; align-items: center; gap: 16px; }

.active-filters-preview { display: flex; gap: 8px; flex-wrap: wrap; }

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(102, 126, 234, 0.15);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    color: var(--primary);
}

.toggle-icon {
    font-size: 20px;
    color: var(--text-muted);
    transition: transform var(--transition);
}

.filters-accordion.open .toggle-icon { transform: rotate(180deg); }

.filters-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
}

.filters-accordion.open .filters-content { max-height: 500px; }

.filters-inner {
    padding: 0 28px 28px;
    border-top: 1px solid var(--border);
}

.filters-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 16px 0;
}

.filters-clear {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    gap: 6px;
}

.filters-clear:hover { border-color: var(--danger); color: var(--danger); }

.filters-body { display: flex; flex-direction: column; gap: 20px; }

.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-start;
}

.filter-group { display: flex; flex-direction: column; gap: 10px; }
.filter-group.grow { flex: 1; min-width: 200px; }

.filter-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    font-weight: 600;
}

/* Level Filters */
.level-filters { display: flex; gap: 10px; flex-wrap: wrap; }

.level-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 100px;
    border: 2px solid var(--border);
    background: var(--bg-lighter);
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    font-family: 'Inter', sans-serif;
}

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

.level-btn.active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.level-btn[data-level="all"].active {
    background: var(--gradient);
    border-color: transparent;
    color: white;
}

.level-btn[data-level="basic"].active {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(16, 185, 129, 0.1));
    border-color: var(--level-basic);
    color: var(--level-basic);
}

.level-btn[data-level="intermediate"].active {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.1));
    border-color: var(--level-intermediate);
    color: var(--level-intermediate);
}

.level-btn[data-level="advanced"].active {
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(239, 68, 68, 0.1));
    border-color: var(--level-advanced);
    color: var(--level-advanced);
}

.level-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    color: white;
}

.level-btn[data-level="all"] .level-icon { background: var(--gradient); }
.level-btn[data-level="basic"] .level-icon { background: var(--level-basic); }
.level-btn[data-level="intermediate"] .level-icon { background: var(--level-intermediate); }
.level-btn[data-level="advanced"] .level-icon { background: var(--level-advanced); }

.level-count {
    background: var(--bg-input);
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 11px;
    font-weight: 700;
}

.level-btn.active .level-count { background: rgba(255, 255, 255, 0.2); }

/* Tag Filters */
.tag-filters { display: flex; gap: 8px; flex-wrap: wrap; }

.tag-btn {
    padding: 10px 16px;
    border-radius: 100px;
    border: 1px solid var(--border);
    background: var(--bg-lighter);
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tag-btn i { font-size: 14px; }

.tag-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.tag-btn.active {
    background: rgba(102, 126, 234, 0.15);
    border-color: var(--primary);
    color: var(--primary);
}

/* Search */
.search-wrapper { position: relative; min-width: 280px; }

.search-wrapper i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 16px;
}

.search-input {
    width: 100%;
    padding: 14px 16px 14px 48px;
    background: var(--bg-lighter);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    color: var(--text);
    font-size: 14px;
    font-family: 'Inter', sans-serif;
    transition: all var(--transition);
}

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

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.15);
}

/* Results count */
.results-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    max-width: 1200px;
    margin: 0 auto;
    flex-wrap: wrap;
    gap: 12px;
}

.results-count { font-size: 14px; color: var(--text-muted); }
.results-count strong { color: var(--primary); font-weight: 700; }

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px 80px;
    position: relative;
    z-index: 1;
}

/* Category Section */
.category-section {
    margin-bottom: 48px;
    animation: fadeInUp 0.6s ease-out backwards;
}

.category-section.hidden { display: none; }

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

.category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
    padding: 24px 28px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
}

.category-header:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.category-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.category-info { flex: 1; }
.category-info h2 { font-size: 1.4rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.category-info p { font-size: 14px; color: var(--text-secondary); margin: 0; }

.category-count {
    padding: 10px 20px;
    background: var(--bg-lighter);
    border: 1px solid var(--border);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Documents Grid */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
}

/* Document Card */
.doc-card {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.doc-card.hidden { display: none; }

.doc-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary);
}

.doc-card-header {
    padding: 28px 28px 0;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    position: relative;
}

.doc-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    color: white;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.doc-meta { flex: 1; min-width: 0; padding-right: 80px; }

.doc-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    line-height: 1.3;
}

.doc-file {
    font-size: 12px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Level Badge */
.level-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 14px;
    border-radius: 100px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.level-badge i { font-size: 12px; }

.level-badge.basic {
    background: rgba(16, 185, 129, 0.15);
    color: var(--level-basic);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.level-badge.intermediate {
    background: rgba(245, 158, 11, 0.15);
    color: var(--level-intermediate);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.level-badge.advanced {
    background: rgba(239, 68, 68, 0.15);
    color: var(--level-advanced);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.doc-card-body { padding: 20px 28px; flex: 1; }

.doc-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.doc-card-footer {
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.doc-tags { display: flex; gap: 8px; flex-wrap: wrap; }

.doc-tag {
    padding: 5px 12px;
    background: var(--bg-lighter);
    border-radius: 6px;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition);
}

.doc-tag:hover {
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary);
}

.doc-duration {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
}

/* Resources */
.doc-resources {
    padding: 0 28px 16px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.resource-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-lighter);
    color: var(--text-secondary);
}

.resource-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

.resource-btn.download {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--success);
    color: var(--success);
}

.resource-btn.download:hover {
    background: var(--success);
    color: white;
}

/* Actions */
.doc-actions { padding: 0 28px 28px; display: flex; gap: 12px; }

.doc-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    background: var(--gradient);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
    flex: 1;
}

.doc-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.doc-link i:last-child { transition: transform var(--transition); }
.doc-link:hover i:last-child { transform: translateX(4px); }

/* Exam Button States */
.exam-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 20px;
    background: var(--bg-lighter);
    border: 2px solid var(--border);
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    transition: all var(--transition);
    cursor: not-allowed;
    opacity: 0.6;
}

.exam-btn.enabled {
    border-color: var(--warning);
    color: var(--warning);
    cursor: pointer;
    opacity: 1;
}

.exam-btn.enabled:hover {
    background: var(--warning);
    color: white;
    transform: translateY(-2px);
}

.exam-btn.completed {
    border-color: var(--success);
    color: var(--success);
    cursor: pointer;
    opacity: 1;
}

.exam-btn.completed:hover {
    background: var(--success);
    color: white;
    transform: translateY(-2px);
}

.exam-btn.claim {
    border-color: var(--primary);
    background: var(--gradient);
    color: white;
    cursor: pointer;
    opacity: 1;
    animation: pulse-claim 2s infinite;
}

.exam-btn.claim:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

@keyframes pulse-claim {
    0%, 100% { box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(102, 126, 234, 0); }
}

/* No results */
.no-results {
    text-align: center;
    padding: 80px 24px;
    color: var(--text-muted);
}

.no-results i { font-size: 80px; margin-bottom: 24px; opacity: 0.3; }
.no-results h3 { font-size: 1.5rem; color: var(--text); margin-bottom: 12px; }
.no-results p { font-size: 14px; max-width: 400px; margin: 0 auto; }

/* Footer */
.footer {
    text-align: center;
    padding: 48px 24px;
    border-top: 1px solid var(--border);
    background: var(--bg-card);
    position: relative;
    z-index: 1;
}

.footer-content { max-width: 600px; margin: 0 auto; }
.footer .logo { justify-content: center; margin-bottom: 16px; }
.footer p { color: var(--text-muted); font-size: 14px; }
.footer a { color: var(--primary); text-decoration: none; font-weight: 600; }
.footer a:hover { text-decoration: underline; }

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px;
    gap: 20px;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading p { color: var(--text-muted); font-size: 14px; }

/* ============================================
   WALLET MODAL
   ============================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active { display: flex; }

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    animation: modalIn 0.3s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 8px;
    transition: color var(--transition);
}

.modal-close:hover { color: var(--text); }

.modal-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: var(--gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: white;
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.modal-content p {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.wallet-options {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.wallet-option {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-lighter);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition);
    text-align: left;
}

.wallet-option:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.wallet-option-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.wallet-option-icon img {
    width: 32px;
    height: 32px;
}

.wallet-option-icon.ox {
    background: var(--gradient);
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 700;
    color: white;
}

.wallet-option-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.wallet-option-info p {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0;
}

/* Network Warning */
.network-warning {
    display: none;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: var(--radius-md);
    margin-top: 16px;
    font-size: 13px;
    color: var(--warning);
}

.network-warning.show { display: flex; }

.network-warning i { font-size: 20px; }

.network-warning button {
    margin-left: auto;
    background: var(--warning);
    border: none;
    color: white;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.network-warning button:hover {
    background: #d97706;
}

/* Modal Buttons */
.modal-buttons {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.modal-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    border: 2px solid transparent;
}

.modal-btn.primary {
    background: var(--gradient);
    color: white;
}

.modal-btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.modal-btn.secondary {
    background: var(--bg-lighter);
    border-color: var(--border);
    color: var(--text);
}

.modal-btn.secondary:hover {
    border-color: var(--primary);
    background: var(--bg-card);
}

.modal-btn.danger {
    background: var(--error);
    color: white;
}

.modal-btn.danger:hover {
    background: #dc2626;
}

/* Confirm Modal */
.modal-confirm .modal-icon.warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.modal-confirm .modal-icon.danger {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

/* Alert Modal */
.modal-alert .modal-icon.success {
    background: linear-gradient(135deg, #10b981, #059669);
}

.modal-alert .modal-icon.error {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.modal-alert .modal-icon.warning {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.modal-alert .modal-icon.info {
    background: var(--gradient);
}

/* Certificate Modal */
.modal-certificate {
    max-width: 700px;
    padding: 32px;
}

.modal-certificate .modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--bg-lighter);
    border: 1px solid var(--border);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 18px;
}

.modal-certificate .modal-close:hover {
    background: var(--bg-card);
    color: var(--text);
    border-color: var(--primary);
}

.certificate-preview {
    background: #0f0f1a;
    border-radius: var(--radius-lg);
    padding: 16px;
    margin-bottom: 24px;
    border: 2px solid var(--border);
    overflow: hidden;
}

.certificate-preview svg {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
}

.certificate-info {
    text-align: center;
    margin-bottom: 24px;
}

.certificate-info h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text);
}

.certificate-info p {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 0;
}

.certificate-actions {
    display: flex;
    gap: 12px;
}

.certificate-actions .modal-btn {
    flex: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .hero { padding: 120px 16px 40px; }
    .hero h1 { font-size: 2.2rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .stat-value { font-size: 2rem; }
    .main-content { padding: 0 16px 40px; }
    .docs-grid { grid-template-columns: 1fr; }
    .category-header { flex-direction: column; text-align: center; gap: 16px; }
    .nav-controls .nav-btn span { display: none; }
    .nav-controls .nav-btn { padding: 10px 12px; }
    .filter-row { flex-direction: column; }
    .search-wrapper { min-width: 100%; width: 100%; }
    .level-filters { justify-content: center; }
    .tag-filters { justify-content: center; }
    .filters-inner { padding: 0 20px 20px; }
    .doc-actions { flex-direction: column; }
    .active-filters-preview { display: none; }
    .modal-content { padding: 24px; margin: 16px; }
    .modal-buttons { flex-direction: column; }
    .certificate-actions { flex-direction: column; }
}