/* ===== CSS Variables ===== */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #0ea5e9;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;

    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #252542;
    --bg-card: #1e1e3f;

    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;

    --border-color: #2d2d4a;
    --border-light: #3d3d5c;

    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);

    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

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

/* ===== Buttons ===== */
.btn-primary, .btn-secondary, .btn-large {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-light);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 26, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--primary-color);
    font-size: 2rem;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: 8px 0;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* ===== Hero Section ===== */
.hero {
    padding: 160px 0 100px;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-content h1 {
    margin-bottom: 24px;
    font-size: 3.5rem;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-bottom: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.hero-image {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 28px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.floating-card span {
    font-weight: 600;
}

.card-1 { top: 10%; left: 10%; animation-delay: 0s; }
.card-2 { top: 20%; right: 10%; animation-delay: 0.5s; }
.card-3 { bottom: 30%; left: 20%; animation-delay: 1s; }
.card-4 { bottom: 10%; right: 20%; animation-delay: 1.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* ===== Section Styles ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-cta {
    text-align: center;
    margin-top: 48px;
}

/* ===== Categories ===== */
.categories {
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.category-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.category-icon i {
    font-size: 2rem;
    color: white;
}

.category-card h3 {
    margin-bottom: 12px;
}

.category-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.tool-count {
    display: inline-block;
    background: var(--bg-tertiary);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Tools Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.tool-card-image {
    position: relative;
    height: 200px;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.tool-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.tool-card:hover .tool-card-image img {
    transform: scale(1.05);
}

.tool-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.tool-card-overlay a {
    background: var(--primary-color);
    color: white;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: transform var(--transition-fast);
}

.tool-card-overlay a:hover {
    transform: scale(1.1);
}

.video-duration {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(0, 0, 0, 0.85);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tool-card-content {
    padding: 24px;
}

.tool-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.tool-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.tool-card-category {
    font-size: 0.85rem;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tool-card-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.5;
}

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

.win-loss-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.85rem;
}

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

.win-loss-badge.loss {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger-color);
}

.win-loss-badge.pending {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

.tool-rating {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--accent-color);
}

.tool-rating i {
    font-size: 0.9rem;
}

/* ===== Win/Loss Stats ===== */
.win-loss-stats {
    background: var(--bg-secondary);
}

.stats-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.stats-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    text-align: center;
    transition: all var(--transition-normal);
}

.stats-card:hover {
    transform: translateY(-4px);
}

.stats-card.win { border-top: 4px solid var(--success-color); }
.stats-card.loss { border-top: 4px solid var(--danger-color); }
.stats-card.pending { border-top: 4px solid var(--warning-color); }

.stats-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.stats-card.win .stats-icon {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success-color);
}

.stats-card.loss .stats-icon {
    background: rgba(239, 68, 68, 0.15);
    color: var(--danger-color);
}

.stats-card.pending .stats-icon {
    background: rgba(245, 158, 11, 0.15);
    color: var(--warning-color);
}

.stats-card h3 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.stats-card p {
    color: var(--text-secondary);
}

/* ===== Video Reviews ===== */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.video-thumbnail {
    position: relative;
    padding-bottom: 56.25%;
    background: var(--bg-tertiary);
}

.video-thumbnail iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

.video-card-content {
    padding: 20px;
}

.video-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.video-card-meta {
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== Filters Section ===== */
.page-header {
    padding: 140px 0 60px;
    background: radial-gradient(ellipse at top, rgba(99, 102, 241, 0.15) 0%, transparent 50%);
    text-align: center;
}

.page-header h1 {
    margin-bottom: 16px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.filters-section {
    padding: 0 0 40px;
    position: sticky;
    top: 80px;
    z-index: 100;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.filters-container {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 300px;
    position: relative;
}

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

.search-box input {
    width: 100%;
    padding: 14px 16px 14px 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.filter-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.sort-dropdown select {
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 48px;
}

.pagination button {
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.pagination button:hover,
.pagination button.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* ===== Categories Detail ===== */
.categories-detail {
    padding: 60px 0 100px;
}

/* ===== Newsletter ===== */
.newsletter {
    background: var(--gradient-primary);
    padding: 80px 0;
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter h2 {
    margin-bottom: 16px;
}

.newsletter p {
    margin-bottom: 32px;
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    gap: 16px;
    max-width: 500px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    color: white;
    font-size: 1rem;
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.newsletter-form input:focus {
    outline: none;
    border-color: white;
}

.newsletter-form button {
    background: white;
    color: var(--primary-color);
    border: none;
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-secondary);
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-color);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.footer-links h4 {
    margin-bottom: 24px;
    color: var(--text-primary);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content p {
        margin: 0 auto 40px;
    }

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

    .hero-image {
        display: none;
    }

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

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

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

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .nav-links,
    .nav-actions {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    .categories-grid,
    .stats-cards,
    .tools-grid,
    .video-grid {
        grid-template-columns: 1fr;
    }

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

    .filters-container {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        min-width: 100%;
    }

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

    .newsletter-form {
        flex-direction: column;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .category-header {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    h1 { font-size: 2rem; }

    .hero-buttons {
        flex-direction: column;
    }

    .btn-large {
        width: 100%;
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-card,
.category-card,
.video-card {
    animation: fadeIn 0.5s ease forwards;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}