@charset "UTF-8";

/* ===== CSS Variables Override ===== */
:root {
    --ai-primary: #7c3aed;
    --ai-secondary: #a855f7;
    --ai-accent: #06b6d4;
    --ai-gradient: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #06b6d4 100%);
}

/* ===== AI Hero Section ===== */
.ai-hero {
    background: linear-gradient(135deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
    border-radius: 16px;
    padding: 50px 40px;
    margin-bottom: 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(124, 58, 237, 0.2);
}

.ai-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.08) 0%, transparent 60%);
    animation: ai-pulse 6s ease-in-out infinite;
}

@keyframes ai-pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 1; }
}

.ai-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(124, 58, 237, 0.3);
    border-radius: 50px;
    color: var(--ai-secondary);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--ai-accent);
    border-radius: 50%;
    animation: pulse-animation 2s ease-in-out infinite;
}

@keyframes pulse-animation {
    0%, 100% { box-shadow: 0 0 0 0 rgba(6, 182, 212, 0.4); }
    50% { box-shadow: 0 0 0 8px rgba(6, 182, 212, 0); }
}

.ai-hero-title {
    font-size: 42px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    letter-spacing: -1px;
}

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

.ai-hero-subtitle {
    color: rgba(255, 255, 255, 0.6);
    font-size: 15px;
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto 24px;
    position: relative;
    z-index: 1;
}

.ai-hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    position: relative;
    z-index: 1;
}

.tag-chip {
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    transition: all 0.3s;
}

.tag-chip:hover {
    background: rgba(124, 58, 237, 0.2);
    border-color: rgba(124, 58, 237, 0.5);
    color: #fff;
    transform: translateY(-2px);
}

/* ===== AI Stats Bar ===== */
.ai-stats-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    background: var(--card_bg);
    border-radius: 12px;
    padding: 20px 40px;
    margin-bottom: 24px;
    border: 1px solid var(--bg_darken);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0 40px;
}

.stat-num {
    font-size: 32px;
    font-weight: 800;
    background: var(--ai-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--font_2);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--bg_darken);
}

/* ===== AI Section Common ===== */
.ai-section {
    margin-bottom: 32px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--bg_darken);
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--font_1);
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--ai-primary);
}

.section-subtitle {
    font-size: 13px;
    font-weight: 400;
    color: var(--font_2);
    margin-left: 8px;
}

.section-more {
    font-size: 13px;
    color: var(--ai-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s;
}

.section-more:hover {
    color: var(--ai-secondary);
    gap: 8px;
}

/* ===== Tech Stack Grid ===== */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.tech-card {
    background: var(--card_bg);
    border: 1px solid var(--bg_darken);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.3s;
    cursor: default;
}

.tech-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(124, 58, 237, 0.15);
    border-color: rgba(124, 58, 237, 0.3);
}

.tech-icon {
    width: 52px;
    height: 52px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 18px;
}

.tech-info h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--font_1);
    margin-bottom: 4px;
}

.tech-info p {
    font-size: 12px;
    color: var(--font_2);
    line-height: 1.4;
}

.tech-level {
    display: flex;
    align-items: center;
    gap: 10px;
}

.level-bar {
    flex: 1;
    height: 4px;
    background: var(--bg_darken);
    border-radius: 4px;
    overflow: hidden;
}

.level-fill {
    height: 100%;
    background: var(--ai-gradient);
    border-radius: 4px;
    transition: width 1s ease;
}

.tech-level span {
    font-size: 11px;
    color: var(--font_2);
    white-space: nowrap;
}

/* ===== Resource Navigation Tabs ===== */
.resource-tabs {
    margin-bottom: 20px;
    padding: 16px 20px;
    background: var(--card_bg);
    border: 1px solid var(--bg_darken);
    border-radius: 14px;
    position: relative;
    overflow: hidden;
}

/* Subtle decorative glow */
.resource-tabs::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.3), rgba(6, 182, 212, 0.3), transparent);
}

.tab-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.tab-chip {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 18px;
    background: transparent;
    border: 1px solid var(--bg_darken);
    border-radius: 50px;
    color: var(--font_2);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    font-family: inherit;
    line-height: 1;
    white-space: nowrap;
}

.tab-chip i {
    font-size: 13px;
    transition: all 0.3s;
    opacity: 0.5;
}

.tab-chip:hover {
    color: var(--ai-primary);
    border-color: rgba(124, 58, 237, 0.3);
    background: rgba(124, 58, 237, 0.05);
    transform: translateY(-1px);
}

.tab-chip:hover i {
    opacity: 1;
}

.tab-chip.active {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

.tab-chip.active i {
    opacity: 1;
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.3));
}

/* Active chip shimmer effect */
.tab-chip.active::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 40%,
        rgba(255, 255, 255, 0.08) 50%,
        transparent 60%
    );
    animation: chip-shimmer 3s ease-in-out infinite;
}

@keyframes chip-shimmer {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

/* Count badge (future use) */
.tab-chip .chip-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.15);
    color: inherit;
}

.tab-chip.active .chip-count {
    background: rgba(255, 255, 255, 0.2);
}

.ai-resource-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 0;
    margin: 0;
}

.resource-card {
    background: var(--card_bg);
    border: 1px solid var(--bg_darken);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s;
}

.resource-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(124, 58, 237, 0.12);
    border-color: rgba(124, 58, 237, 0.25);
}

.resource-link {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    text-decoration: none;
    color: inherit;
}

.resource-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(6, 182, 212, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.resource-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.resource-icon i {
    color: var(--ai-primary);
    font-size: 18px;
}

.resource-body {
    flex: 1;
    min-width: 0;
}

.resource-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--font_1);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.resource-desc {
    font-size: 12px;
    color: var(--font_2);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}

.resource-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.res-tag {
    padding: 2px 8px;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 4px;
    font-size: 11px;
    color: var(--ai-primary);
}

.resource-meta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: var(--font_2);
    font-size: 12px;
    flex-shrink: 0;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.resource-meta i.fa-external-link {
    color: var(--ai-accent);
    margin-top: 4px;
}

/* ===== Article Grid ===== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.article-card {
    background: var(--card_bg);
    border: 1px solid var(--bg_darken);
    border-radius: 12px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s;
    display: block;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: rgba(124, 58, 237, 0.3);
}

.article-cover {
    position: relative;
    height: 140px;
    overflow: hidden;
}

.article-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.article-card:hover .article-cover img {
    transform: scale(1.05);
}

.article-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.article-card:hover .article-overlay {
    opacity: 1;
}

.article-overlay i {
    font-size: 28px;
    color: #fff;
}

.article-body {
    padding: 14px;
}

.article-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--font_1);
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.article-abstract {
    font-size: 12px;
    color: var(--font_2);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
}

.article-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--font_2);
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ===== Quick Access ===== */
.quick-access-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.quick-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 20px 16px;
    background: var(--card_bg);
    border: 1px solid var(--bg_darken);
    border-radius: 12px;
    text-decoration: none;
    color: var(--font_1);
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s;
}

.quick-card i {
    font-size: 24px;
    transition: transform 0.3s;
}

.quick-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.quick-card:hover i {
    transform: scale(1.2);
}

.quick-card.q1:hover { border-color: #10a37f; color: #10a37f; }
.quick-card.q2:hover { border-color: #d97706; color: #d97706; }
.quick-card.q3:hover { border-color: #2563eb; color: #2563eb; }
.quick-card.q4:hover { border-color: #7c3aed; color: #7c3aed; }
.quick-card.q5:hover { border-color: #20beff; color: #20beff; }
.quick-card.q6:hover { border-color: #ffd60a; color: #ffd60a; }
.quick-card.q7:hover { border-color: #b91c1c; color: #b91c1c; }
.quick-card.q8:hover { border-color: #24292e; color: #24292e; }

/* ===== Empty State ===== */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 0;
    color: var(--font_2);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 14px;
    margin-bottom: 12px;
}

.browse-link {
    color: var(--ai-primary);
    text-decoration: none;
    font-size: 13px;
    padding: 6px 16px;
    border: 1px solid var(--ai-primary);
    border-radius: 6px;
    transition: all 0.2s;
}

.browse-link:hover {
    background: var(--ai-primary);
    color: #fff;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .ai-hero { padding: 30px 20px; }
    .ai-hero-title { font-size: 28px; }
    .ai-stats-bar { padding: 16px 20px; flex-wrap: wrap; }
    .stat-item { padding: 10px 20px; }
    .stat-num { font-size: 24px; }
    .tech-grid { grid-template-columns: repeat(2, 1fr); }
    .ai-resource-list { grid-template-columns: 1fr; }
    .article-grid { grid-template-columns: repeat(2, 1fr); }
    .quick-access-grid { grid-template-columns: repeat(4, 1fr); }
    .resource-tabs { padding: 12px 14px; }
    .tab-chips { gap: 8px; }
    .tab-chip { padding: 6px 14px; font-size: 12px; gap: 5px; }
    .tab-chip i { font-size: 12px; }
}

@media (max-width: 480px) {
    .tech-grid, .article-grid { grid-template-columns: 1fr; }
    .quick-access-grid { grid-template-columns: repeat(2, 1fr); }
    .resource-tabs { padding: 10px 12px; }
    .tab-chips { gap: 6px; }
    .tab-chip { padding: 5px 12px; font-size: 11px; }
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 24px;
    padding: 16px 0;
}

.page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--bg_darken);
    border-radius: 8px;
    background: var(--card_bg);
    color: var(--font_2);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-family: inherit;
}

.page-btn:hover:not(:disabled) {
    border-color: var(--ai-primary);
    color: var(--ai-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(124, 58, 237, 0.15);
}

.page-btn.active {
    background: linear-gradient(135deg, #7c3aed 0%, #6d28d9 100%);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 4px 12px rgba(124, 58, 237, 0.3);
    transform: translateY(-1px);
}

.page-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.page-btn:disabled:hover {
    border-color: var(--bg_darken);
    color: var(--font_2);
}

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

/* ===== Pagination Animation ===== */
.ai-resource-list {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.resource-card {
    animation: fadeInUp 0.6s ease-out;
}

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

/* Staggered animation for resource cards */
.resource-card:nth-child(1) { animation-delay: 0.1s; }
.resource-card:nth-child(2) { animation-delay: 0.2s; }
.resource-card:nth-child(3) { animation-delay: 0.3s; }
.resource-card:nth-child(4) { animation-delay: 0.4s; }
.resource-card:nth-child(5) { animation-delay: 0.5s; }
.resource-card:nth-child(6) { animation-delay: 0.6s; }