/* ============================================
   EduTools - Component Styles
   ============================================ */

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md), 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    box-shadow: var(--shadow-lg), 0 6px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
}

.btn-secondary:hover {
    background: var(--neutral-50);
    border-color: var(--primary-300);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--neutral-100);
    color: var(--text-primary);
}

.btn-icon {
    padding: var(--space-3);
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

/* === Cards === */
.card {
    background: var(--surface-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all var(--transition-slow);
}

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

.card-body {
    padding: var(--space-6);
}

.card-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--border-light);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-light);
    background: var(--bg-tertiary);
}

/* === Tool Card === */
.tool-card {
    background: var(--surface-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: all var(--transition-slow);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-6px);
}

.tool-card-header {
    padding: var(--space-5);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--space-3);
    border-bottom: 1px solid var(--border-light);
}

.tool-card-logo {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    flex-shrink: 0;
}

.tool-card-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.tool-card-actions {
    display: flex;
    gap: var(--space-2);
}

.tool-card-body {
    padding: var(--space-5);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.tool-card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.tool-card-description {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-card-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-top: auto;
}

.tool-card-meta-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.tool-card-meta-row .icon {
    font-size: var(--text-base);
    flex-shrink: 0;
}

.tool-card-footer {
    padding: var(--space-4) var(--space-5);
    border-top: 1px solid var(--border-light);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
}

.tool-card-tip {
    padding: var(--space-3) var(--space-4);
    background: var(--primary-50);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    color: var(--primary-700);
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.tool-card-tip .icon {
    flex-shrink: 0;
}

/* === Tags === */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.tag-primary {
    background: var(--primary-100);
    color: var(--primary-700);
}

.tag-secondary {
    background: var(--secondary-100);
    color: var(--secondary-700);
}

.tag-success {
    background: var(--success-100);
    color: var(--success-700);
}

.tag-warning {
    background: var(--warning-100);
    color: var(--warning-600);
}

.tag-error {
    background: var(--error-100);
    color: var(--error-600);
}

.tag-neutral {
    background: var(--neutral-100);
    color: var(--neutral-600);
}

/* Pricing Tags */
.tag-free {
    background: var(--success-100);
    color: var(--success-700);
}

.tag-freemium {
    background: var(--warning-100);
    color: var(--warning-600);
}

.tag-paid {
    background: var(--error-100);
    color: var(--error-600);
}

/* Tags Wrapper */
.tags-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

/* === Rating === */
.rating {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
}

.rating-stars {
    display: flex;
    gap: 2px;
}

.rating-star {
    color: var(--accent-400);
    font-size: var(--text-base);
}

.rating-star.empty {
    color: var(--neutral-300);
}

.rating-value {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-left: var(--space-1);
}

.rating-count {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* === Favorite Button === */
.favorite-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-lg);
    background: var(--neutral-100);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    color: var(--neutral-400);
    font-size: var(--text-lg);
}

.favorite-btn:hover {
    background: var(--error-50);
    color: var(--error-500);
}

.favorite-btn.active {
    background: var(--error-100);
    color: var(--error-500);
}

/* === Search Bar === */
.search-bar {
    position: relative;
    width: 100%;
    max-width: 600px;
}

.search-bar-input {
    width: 100%;
    padding: var(--space-4) var(--space-12) var(--space-4) var(--space-12);
    font-size: var(--text-base);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    background: var(--bg-secondary);
    transition: all var(--transition-fast);
}

.search-bar-input:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

.search-bar-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: var(--text-xl);
    pointer-events: none;
}

.search-bar-clear {
    position: absolute;
    right: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    padding: var(--space-2);
    color: var(--text-tertiary);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
}

.search-bar-input:not(:placeholder-shown)+.search-bar-icon+.search-bar-clear,
.search-bar-input:focus+.search-bar-icon+.search-bar-clear {
    opacity: 1;
    visibility: visible;
}

/* === Filter Panel === */
.filter-panel {
    background: var(--surface-card);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    box-shadow: var(--shadow-sm);
}

.filter-section {
    margin-bottom: var(--space-6);
}

.filter-section:last-child {
    margin-bottom: 0;
}

.filter-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.filter-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.filter-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-option:hover {
    background: var(--neutral-100);
}

.filter-option.active {
    background: var(--primary-50);
}

.filter-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-default);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.filter-option.active .filter-checkbox {
    background: var(--primary-500);
    border-color: var(--primary-500);
    color: white;
}

.filter-label {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    flex: 1;
}

.filter-count {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    background: var(--neutral-100);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
}

/* === Category Cards === */
.category-card {
    background: var(--surface-card);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    text-align: center;
    transition: all var(--transition-slow);
    cursor: pointer;
    border: 2px solid transparent;
    position: relative;
}

.category-card::before {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: calc(var(--radius-xl) + 2px);
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    opacity: 0;
    z-index: -1;
    transition: opacity var(--transition-base);
}

.category-card:hover {
    border-color: transparent;
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.15);
    transform: translateY(-6px);
}

.category-card:hover::before {
    opacity: 1;
}

.category-card-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto var(--space-4);
    background: linear-gradient(135deg, var(--primary-100), var(--secondary-100));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-3xl);
    transition: all var(--transition-base);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.1);
}

.category-card:hover .category-card-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.2);
}

.category-card-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.category-card-count {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* === Navigation === */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    max-width: var(--container-xl);
    margin: 0 auto;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    transform: scale(1.02);
}

.navbar-logo {
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.navbar-title {
    font-family: var(--font-family-display);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.navbar-link {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    text-decoration: none;
    position: relative;
}

.navbar-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--primary-600);
    background: var(--primary-50);
}

.navbar-link.active::after {
    width: 60%;
}

.navbar-menu-btn {
    display: none;
    padding: var(--space-2);
    font-size: var(--text-xl);
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        border-bottom: 1px solid var(--border-light);
        padding: var(--space-4);
        flex-direction: column;
        gap: var(--space-1);
    }

    .navbar-nav.open {
        display: flex;
    }

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

    .navbar-link {
        width: 100%;
        padding: var(--space-3) var(--space-4);
    }
}

/* === Hero Section === */
.hero {
    background: linear-gradient(-45deg, #667eea, #764ba2, #6366F1, #8B5CF6);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    color: var(--text-inverse);
    padding: var(--space-24) 0 var(--space-20);
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='2'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -20%;
    width: 140%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--text-5xl);
    font-weight: var(--font-extrabold);
    margin-bottom: var(--space-6);
    color: white;
    line-height: 1.1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: var(--text-xl);
    opacity: 0.95;
    margin-bottom: var(--space-10);
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.6;
}

.hero-search {
    max-width: 580px;
    margin: 0 auto var(--space-10);
}

.hero-search .search-bar-input {
    border: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.1);
    padding: var(--space-5) var(--space-12) var(--space-5) var(--space-12);
    font-size: var(--text-lg);
    transition: all var(--transition-base);
}

.hero-search .search-bar-input:focus {
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.25), 0 0 0 3px rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-categories {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-3);
}

.hero-category-btn {
    padding: var(--space-3) var(--space-5);
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--radius-full);
    color: white;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: all var(--transition-base);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.hero-category-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

@media (max-width: 768px) {
    .hero {
        padding: var(--space-12) 0;
    }

    .hero-title {
        font-size: var(--text-3xl);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }
}

/* === Section Headers === */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-title {
    font-size: var(--text-3xl);
    margin-bottom: var(--space-4);
}

.section-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* === Footer === */
.footer {
    background: var(--neutral-900);
    color: var(--neutral-300);
    padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-12);
    margin-bottom: var(--space-12);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
}

.footer-logo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
}

.footer-logo-text {
    font-family: var(--font-family-display);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: white;
}

.footer-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--neutral-400);
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: white;
    margin-bottom: var(--space-4);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-size: var(--text-sm);
    color: var(--neutral-400);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    padding-top: var(--space-8);
    border-top: 1px solid var(--neutral-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
    color: var(--neutral-500);
}

.footer-social {
    display: flex;
    gap: var(--space-4);
}

.footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--neutral-400);
    transition: all var(--transition-base);
}

.footer-social a:hover {
    background: var(--primary-500);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

    .footer-brand {
        grid-column: span 2;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* === Modal === */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal-backdrop.open {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--surface-card);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
    max-width: 560px;
    width: 90%;
    max-height: 90vh;
    overflow: auto;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
}

.modal.open {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
}

.modal-close {
    padding: var(--space-2);
    color: var(--text-tertiary);
    font-size: var(--text-xl);
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

.modal-body {
    padding: var(--space-6);
}

.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: var(--space-6);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-2);
}

.empty-state-text {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* === Loading Spinner === */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--neutral-200);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* === Tooltip === */
.tooltip {
    position: relative;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-2) var(--space-3);
    background: var(--neutral-800);
    color: white;
    font-size: var(--text-xs);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-2);
    z-index: var(--z-tooltip);
}

.tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* === Badge === */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    height: 20px;
    padding: 0 var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-bold);
    background: var(--error-500);
    color: white;
    border-radius: var(--radius-full);
}

/* === Form Elements === */
.form-group {
    margin-bottom: var(--space-6);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.form-input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    font-size: var(--text-base);
    transition: all var(--transition-fast);
}

.form-input:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    outline: none;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.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='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: var(--space-10);
}

.form-checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.form-checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.form-checkbox-label:hover {
    border-color: var(--primary-300);
}

.form-checkbox-label.checked {
    background: var(--primary-50);
    border-color: var(--primary-400);
}

.form-checkbox-label input {
    display: none;
}

.form-helper {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-2);
}

/* === Tabs === */
.tabs {
    display: flex;
    gap: var(--space-1);
    border-bottom: 2px solid var(--border-light);
    margin-bottom: var(--space-6);
}

.tab {
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tab:hover {
    color: var(--text-primary);
}

.tab.active {
    color: var(--primary-600);
    border-bottom-color: var(--primary-600);
}

/* === Pagination === */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-8);
}

.pagination-btn {
    min-width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--primary-300);
    color: var(--primary-600);
}

.pagination-btn.active {
    background: var(--primary-500);
    color: white;
    border-color: var(--primary-500);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* === Tool Detail Modal === */
.tool-detail-modal {
    max-width: 640px;
    width: 95%;
}

.tool-detail-modal .modal-header {
    background: var(--gradient-primary);
    color: white;
    border-bottom: none;
}

.modal-tool-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.modal-tool-logo {
    width: 56px;
    height: 56px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
}

.tool-detail-modal .modal-title {
    color: white;
    margin-bottom: var(--space-1);
}

.tool-detail-modal .modal-close {
    color: rgba(255, 255, 255, 0.8);
}

.tool-detail-modal .modal-close:hover {
    color: white;
}

.modal-rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--text-sm);
}

.modal-rating .rating-star {
    color: var(--accent-400);
}

.modal-description {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

.modal-section {
    margin-bottom: var(--space-6);
}

.modal-section h4 {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.modal-tip {
    background: var(--primary-50);
    border-left: 4px solid var(--primary-500);
    padding: var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    color: var(--primary-800);
    line-height: var(--leading-relaxed);
}

.modal-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-6);
}

.modal-meta-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.modal-meta-label {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.user-rating {
    display: flex;
    gap: var(--space-2);
}

.rating-star-btn {
    font-size: var(--text-2xl);
    color: var(--neutral-300);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.rating-star-btn:hover,
.rating-star-btn.active {
    color: var(--accent-400);
    transform: scale(1.2);
}

@media (max-width: 640px) {
    .modal-meta {
        grid-template-columns: 1fr;
    }

    .tool-detail-modal {
        max-height: 95vh;
    }
}

/* ============================================
   AI Chat Widget Styles
   ============================================ */

.ai-chat-widget {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-modal);
    font-family: var(--font-family-base);
}

/* Chat Toggle Button */
.ai-chat-toggle {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: var(--shadow-xl);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    transition: all var(--transition-base);
}

.ai-chat-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.ai-chat-toggle:active {
    transform: scale(0.95);
}

.ai-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-400);
    color: white;
    font-size: 10px;
    font-weight: var(--font-bold);
    padding: 2px 6px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

/* Chat Window */
.ai-chat-window {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 380px;
    max-width: calc(100vw - var(--space-12));
    height: 600px;
    max-height: calc(100vh - 120px);
    background: var(--surface-card);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease-out;
}

.ai-chat-widget.open .ai-chat-window {
    display: flex;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

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

/* Chat Header */
.ai-chat-header {
    padding: var(--space-4);
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-chat-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

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

.ai-chat-title h3 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    margin: 0;
    color: white;
}

.ai-chat-title p {
    font-size: var(--text-xs);
    margin: 0;
    opacity: 0.9;
    color: rgba(255, 255, 255, 0.8);
}

.ai-chat-close-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.ai-chat-close-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Chat Messages */
.ai-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    background: var(--bg-secondary);
}

.ai-message {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-lg);
    max-width: 85%;
    line-height: var(--leading-relaxed);
    font-size: var(--text-sm);
    animation: messageSlide 0.3s ease-out;
}

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

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

.ai-message.system-message {
    background: var(--primary-50);
    color: var(--primary-900);
    border: 1px solid var(--primary-200);
    align-self: center;
    max-width: 100%;
}

.ai-message.system-message ul {
    margin: var(--space-2) 0 0 var(--space-4);
    padding: 0;
}

.ai-message.system-message li {
    margin-bottom: var(--space-1);
}

.ai-message.user-message {
    background: var(--primary-500);
    color: white;
    align-self: flex-end;
}

.ai-message.ai-message:not(.system-message) {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    align-self: flex-start;
}

.ai-message.error-message {
    background: var(--error-50);
    color: var(--error-700);
    border: 1px solid var(--error-200);
    align-self: center;
}

/* API Key Section */
.ai-api-key-section {
    padding: var(--space-4);
    background: var(--warning-50);
    border: 1px solid var(--warning-200);
    border-radius: var(--radius-lg);
    margin: var(--space-2);
}

.ai-api-key-section p {
    font-size: var(--text-sm);
    color: var(--warning-700);
    margin-bottom: var(--space-3);
}

.ai-api-key-section input {
    width: 100%;
    padding: var(--space-3);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

.ai-btn-primary {
    width: 100%;
    padding: var(--space-3);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-weight: var(--font-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
}

.ai-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.ai-link {
    display: block;
    text-align: center;
    font-size: var(--text-xs);
    color: var(--primary-600);
    text-decoration: none;
    margin-top: var(--space-2);
}

.ai-link:hover {
    text-decoration: underline;
}

/* Chat Input */
.ai-chat-input-area {
    border-top: 1px solid var(--border-light);
    background: white;
}

.ai-chat-input-container {
    display: flex;
    gap: var(--space-2);
    padding: var(--space-3);
    align-items: flex-end;
}

#ai-chat-input {
    flex: 1;
    padding: var(--space-3);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-family: inherit;
    resize: none;
    max-height: 120px;
    line-height: 1.5;
}

#ai-chat-input:focus {
    outline: none;
    border-color: var(--primary-400);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.ai-send-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.ai-send-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.ai-send-btn:active {
    transform: scale(0.95);
}

/* Mobile Responsive */
@media (max-width: 640px) {
    .ai-chat-widget {
        bottom: var(--space-4);
        right: var(--space-4);
    }

    .ai-chat-toggle {
        width: 56px;
        height: 56px;
    }

    .ai-chat-window {
        width: calc(100vw - var(--space-8));
        height: calc(100vh - 140px);
        bottom: 72px;
        right: 0;
    }
}

/* === Theme Toggle Button === */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-lg);
    background: var(--neutral-100);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: none;
    font-size: var(--text-xl);
    color: var(--text-secondary);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--neutral-200);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    transition: all 0.3s ease;
}

.theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

[data-theme="dark"] .theme-toggle {
    background: var(--neutral-100);
    color: var(--accent-400);
}

/* Dark mode navbar override */
[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Dark mode specific overrides for hardcoded colors */
[data-theme="dark"] .teacher-card,
[data-theme="dark"] .tool-card-tip {
    background: var(--surface-card) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .quick-category-btn {
    background: var(--surface-card);
    border-color: var(--border-light);
    color: var(--text-primary);
}

[data-theme="dark"] .quick-category-btn:hover {
    background: var(--primary-900);
    border-color: var(--primary-400);
}

/* Dark mode section backgrounds */
[data-theme="dark"] section[style*="background: linear-gradient"] {
    background: var(--bg-tertiary) !important;
}

/* Dark mode search bar text color */
[data-theme="dark"] .search-bar-input {
    background: var(--surface-card);
    color: #FFFFFF;
    border-color: var(--border-default);
}

[data-theme="dark"] .search-bar-input::placeholder {
    color: var(--text-tertiary);
}

/* === Ads === */
.ad-container {
    width: 100%;
    margin: var(--space-8) 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: transparent;
    min-height: 100px;
    /* Prevent layout shift */
    overflow: hidden;
}

.ad-placeholder {
    width: 100%;
    max-width: 728px;
    height: 90px;
    background: var(--neutral-100);
    border: 1px dashed var(--neutral-300);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: var(--text-sm);
}

@media (max-width: 768px) {
    .ad-placeholder {
        height: 250px;
        max-width: 300px;
    }
}

/* Light mode search bar text color (explicit) */
.search-bar-input {
    color: #000000;
}

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

/* === Dark Mode: User Menu & Dropdowns === */
[data-theme="dark"] .user-dropdown {
    background: var(--surface-card);
    border: 1px solid var(--border-light);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--neutral-100);
}

[data-theme="dark"] .user-menu-btn {
    background: var(--surface-card);
    border-color: var(--border-light);
    color: var(--text-primary);
}

[data-theme="dark"] .user-menu-btn:hover {
    background: var(--primary-900);
}

/* === Dark Mode: Avatar Picker Modal === */
[data-theme="dark"] .avatar-picker-content {
    background: var(--surface-card);
    color: var(--text-primary);
}

[data-theme="dark"] .avatar-picker-header {
    border-color: var(--border-light);
}

[data-theme="dark"] .avatar-picker-close {
    color: var(--text-secondary);
}

[data-theme="dark"] .avatar-option {
    background: var(--bg-tertiary);
    border-color: var(--border-light);
}

[data-theme="dark"] .avatar-option:hover {
    background: var(--primary-900);
    border-color: var(--primary-400);
}

/* === Dark Mode: Form Inputs === */
[data-theme="dark"] .form-input {
    background: var(--surface-card);
    border-color: var(--border-default);
    color: var(--text-primary);
}

[data-theme="dark"] .form-input::placeholder {
    color: var(--text-tertiary);
}

[data-theme="dark"] .form-input:focus {
    border-color: var(--primary-400);
    box-shadow: 0 0 0 4px rgba(129, 140, 248, 0.2);
}

[data-theme="dark"] .form-input.error {
    border-color: var(--error-500);
    background: rgba(239, 68, 68, 0.1);
}

[data-theme="dark"] .form-select {
    background-color: var(--surface-card);
    color: var(--text-primary);
}

/* === Dark Mode: Auth Card === */
[data-theme="dark"] .auth-card {
    background: var(--surface-card);
}

[data-theme="dark"] .auth-tab {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

[data-theme="dark"] .auth-tab:hover:not(.active) {
    background: var(--neutral-100);
}

[data-theme="dark"] .role-option {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary);
}

/* === Dark Mode: Modals === */
[data-theme="dark"] .modal-content,
[data-theme="dark"] .comparison-content {
    background: var(--surface-card);
    color: var(--text-primary);
}

[data-theme="dark"] .modal-header,
[data-theme="dark"] .comparison-header {
    border-color: var(--border-light);
}

/* === Dark Mode: Tables === */
[data-theme="dark"] .comparison-table th {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

[data-theme="dark"] .comparison-table td {
    border-color: var(--border-light);
}

/* === Dark Mode: Admin Panel === */
[data-theme="dark"] .admin-sidebar,
[data-theme="dark"] .admin-content {
    background: var(--surface-card);
}

[data-theme="dark"] .admin-nav-item:hover {
    background: var(--neutral-100);
}

[data-theme="dark"] .admin-nav-item.active {
    background: var(--primary-900);
    color: var(--primary-300);
}

[data-theme="dark"] .tool-list-item {
    background: var(--bg-tertiary);
}

[data-theme="dark"] .tool-list-item:hover {
    background: var(--neutral-200);
}

[data-theme="dark"] .stat-card {
    background: var(--bg-tertiary);
}

/* === Dark Mode: Navbar Glassmorphism === */
[data-theme="dark"] .navbar {
    background: rgba(15, 23, 42, 0.8);
    border-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
}

/* === Dark Mode: Tags & Labels === */
[data-theme="dark"] .tag,
[data-theme="dark"] .tag-primary,
[data-theme="dark"] .tag-secondary,
[data-theme="dark"] .tag-neutral {
    background: var(--neutral-100);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

[data-theme="dark"] .tag-success,
[data-theme="dark"] .tag-free {
    background: rgba(16, 185, 129, 0.2);
    color: #34d399;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

[data-theme="dark"] .tag-warning,
[data-theme="dark"] .tag-freemium {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

[data-theme="dark"] .tag-error,
[data-theme="dark"] .tag-paid {
    background: rgba(239, 68, 68, 0.2);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Dark mode tool card meta text */
[data-theme="dark"] .tool-card-meta-row {
    color: var(--text-secondary);
}

/* Dark mode tool card tip */
[data-theme="dark"] .tool-card-tip {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}

/* ============================================
   Mobile Responsive Enhancements
   ============================================ */

/* Mobile Filter Panel - Better UX */
@media (max-width: 1024px) {
    .filter-panel {
        background: var(--surface-card);
        padding: var(--space-6);
        padding-top: var(--space-16);
    }

    .filter-panel.open {
        animation: slideInUp 0.3s ease-out;
    }

    @keyframes slideInUp {
        from {
            transform: translateY(100%);
            opacity: 0;
        }

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

    .filter-close-btn {
        display: flex !important;
        position: fixed;
        top: var(--space-4);
        right: var(--space-4);
        width: 44px;
        height: 44px;
        border-radius: var(--radius-full);
        background: var(--neutral-200);
        font-size: var(--text-xl);
        align-items: center;
        justify-content: center;
        z-index: 10001;
        border: none;
        cursor: pointer;
    }

    .mobile-filter-toggle {
        display: flex !important;
        position: fixed;
        bottom: var(--space-6);
        right: var(--space-6);
        z-index: 1000;
        padding: var(--space-4) var(--space-6);
        gap: var(--space-2);
        box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    }

    .mobile-filter-toggle::before {
        content: '🔍';
    }
}

/* Enhanced Mobile Navigation */
@media (max-width: 768px) {
    .navbar-container {
        padding: var(--space-3) var(--space-4);
    }

    .navbar-title {
        font-size: var(--text-base);
    }

    .navbar-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        font-size: var(--text-2xl);
        background: var(--neutral-100);
        border-radius: var(--radius-lg);
        border: none;
        cursor: pointer;
    }

    .navbar-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-secondary);
        z-index: 9999;
        padding: var(--space-20) var(--space-6) var(--space-6);
        flex-direction: column;
        gap: var(--space-2);
        overflow-y: auto;
    }

    .navbar-nav.open {
        display: flex;
        animation: fadeIn 0.2s ease-out;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
        }

        to {
            opacity: 1;
        }
    }

    .navbar-link {
        padding: var(--space-4);
        font-size: var(--text-lg);
        border-radius: var(--radius-lg);
        text-align: center;
    }

    .navbar-nav .btn {
        width: 100%;
        justify-content: center;
        padding: var(--space-4);
    }

    .theme-toggle {
        position: fixed;
        top: var(--space-4);
        right: var(--space-16);
    }
}

/* Mobile Tools Grid */
@media (max-width: 768px) {
    .tools-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .explore-header {
        flex-direction: column;
        align-items: stretch;
    }

    .explore-controls {
        flex-direction: column;
        gap: var(--space-3);
    }

    .explore-search {
        max-width: 100%;
    }

    .explore-search input {
        width: 100%;
    }
}

/* Mobile Category Cards */
@media (max-width: 640px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-3);
    }

    .category-card {
        padding: var(--space-4);
    }

    .category-card-icon {
        width: 48px;
        height: 48px;
        font-size: var(--text-2xl);
    }
}

/* Mobile Hero Section */
@media (max-width: 640px) {
    .hero {
        padding: var(--space-10) 0;
    }

    .hero-title {
        font-size: var(--text-2xl);
    }

    .hero-subtitle {
        font-size: var(--text-sm);
    }

    .hero-categories {
        gap: var(--space-2);
    }

    .hero-category-btn {
        padding: var(--space-2) var(--space-3);
        font-size: var(--text-xs);
    }
}

/* Mobile Stats Section */
@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-4);
    }

    .stat-number {
        font-size: var(--text-2xl);
    }
}

/* Mobile Footer */
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-4);
    }
}

/* Mobile Tool Card Improvements */
@media (max-width: 480px) {
    .tool-card-header {
        padding: var(--space-4);
    }

    .tool-card-logo {
        width: 48px;
        height: 48px;
    }

    .tool-card-body {
        padding: var(--space-4);
    }

    .tool-card-title {
        font-size: var(--text-base);
    }

    .tool-card-footer {
        padding: var(--space-3) var(--space-4);
        flex-wrap: wrap;
    }
}

/* Dark mode mobile filter button */
[data-theme="dark"] .mobile-filter-toggle {
    background: var(--primary-600);
}

[data-theme="dark"] .filter-close-btn {
    background: var(--neutral-700);
    color: white;
}

[data-theme="dark"] .navbar-menu-btn {
    background: var(--neutral-700);
    color: white;
}

/* Navbar Close Button for Mobile */
.navbar-close-btn {
    display: none;
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--neutral-200);
    border: none;
    font-size: var(--text-xl);
    cursor: pointer;
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

@media (max-width: 768px) {
    .navbar-close-btn {
        display: flex;
    }
}

[data-theme="dark"] .navbar-close-btn {
    background: var(--neutral-700);
    color: white;
}