:root {
    --primary: #0d6efd;
    --primary-dark: #0b5ed7;
    --primary-light: #e8f0fe;
    --secondary: #6c757d;
    --dark: #1e293b;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-500: #64748b;
    --gray-700: #334155;
    --gray-900: #0f172a;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --shadow-xl: 0 20px 40px -5px rgba(0,0,0,0.1);
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--gray-50);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    color: var(--gray-700);
    -webkit-font-smoothing: antialiased;
}

main {
    flex: 1;
}

.ho-navbar {
    background: var(--primary);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 1050;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.ho-navbar.scrolled {
    background: rgba(13, 110, 253, 0.92);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    box-shadow: 0 4px 20px rgba(13, 110, 253, 0.15);
}

.navbar-brand {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.navbar .nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar .nav-link:hover {
    background: rgba(255,255,255,0.15);
}

.hero-section {
    background: linear-gradient(135deg, #0d6efd 0%, #0b5ed7 40%, #084db5 100%);
    padding: 4.5rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-section::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    line-height: 1.7;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.hero-badge:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}

.hero-badge i {
    font-size: 1rem;
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.02em;
}

.section-title i {
    font-size: 1.2rem;
}

.popular-tools-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.popular-tool-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.2rem;
    border-radius: 50px;
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: none;
}

.popular-tool-pill:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.popular-tool-pill--1 {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: #1e40af;
}
.popular-tool-pill--1:hover { color: #1e40af; }

.popular-tool-pill--2 {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #065f46;
}
.popular-tool-pill--2:hover { color: #065f46; }

.popular-tool-pill--3 {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    color: #92400e;
}
.popular-tool-pill--3:hover { color: #92400e; }

.popular-tool-pill--0 {
    background: linear-gradient(135deg, #fce7f3, #fbcfe8);
    color: #9d174d;
}
.popular-tool-pill--0:hover { color: #9d174d; }

.popular-tool-pill i {
    font-size: 1rem;
}

.category-card-home {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-200);
    transition: var(--transition);
    height: 100%;
}

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

.category-card-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    border-radius: var(--radius);
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--primary);
    transition: var(--transition);
}

.category-card-home:hover .category-card-icon {
    background: var(--primary);
    color: #fff;
}

.category-card-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.35rem;
}

.category-card-body p {
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.category-card-link {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.category-card-link i {
    transition: var(--transition);
}

.category-card-home:hover .category-card-link i {
    transform: translateX(4px);
}

.tool-list-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: #fff;
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.tool-list-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    background: var(--primary-light);
}

.tool-list-item i:first-child {
    font-size: 1.1rem;
    min-width: 20px;
}

.tool-list-item strong {
    display: block;
    font-size: 0.88rem;
    color: var(--gray-900);
    font-weight: 600;
}

.tool-list-item small {
    display: block;
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 2px;
    line-height: 1.4;
}

.seo-section {
    background: #fff;
    border-radius: var(--radius);
    padding: 2rem;
    border: 1px solid var(--gray-200);
}

.seo-text p {
    font-size: 0.92rem;
    line-height: 1.8;
    color: var(--gray-700);
}

.ho-accordion .accordion-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm) !important;
    margin-bottom: 0.5rem;
    overflow: hidden;
}

.ho-accordion .accordion-button {
    font-weight: 600;
    font-size: 0.92rem;
    color: var(--gray-900);
    padding: 1rem 1.25rem;
    background: #fff;
}

.ho-accordion .accordion-button:not(.collapsed) {
    background: var(--primary-light);
    color: var(--primary-dark);
    box-shadow: none;
}

.ho-accordion .accordion-body {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--gray-700);
}

.sidebar-sticky {
    position: sticky;
    top: 80px;
}

.ad-placeholder {
    background: var(--gray-100);
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius);
    height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-500);
    font-size: 0.85rem;
    font-weight: 500;
}

.ad-placeholder-tall {
    height: 600px;
}

.sidebar-card {
    border-radius: var(--radius) !important;
    overflow: hidden;
}

.sidebar-card .card-header {
    border-radius: 0 !important;
    padding: 0.85rem 1rem;
    font-size: 0.9rem;
}

.sidebar-link {
    font-size: 0.85rem;
    padding: 0.6rem 1rem !important;
    transition: var(--transition);
    border-left: 3px solid transparent !important;
}

.sidebar-link:hover {
    background: var(--primary-light) !important;
    border-left: 3px solid var(--primary) !important;
}

.card {
    border-radius: var(--radius);
}

.card-header {
    border-radius: var(--radius) var(--radius) 0 0 !important;
}

.category-card,
.tool-card {
    transition: var(--transition);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

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

.btn {
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.form-control {
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-300);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.12);
}

.breadcrumb {
    background: none;
    padding: 0;
    font-size: 0.85rem;
}

.breadcrumb-item a {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.cookie-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--dark);
    color: #fff;
    padding: 15px 0;
    z-index: 1050;
    display: none;
    backdrop-filter: blur(8px);
}

.cookie-banner.show {
    display: block;
}

.nav-tabs .nav-link {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    color: var(--secondary);
    font-weight: 500;
}

.nav-tabs .nav-link.active {
    color: var(--primary);
    font-weight: 600;
}

.alert {
    border-radius: var(--radius);
    border: none;
}

.progress {
    border-radius: var(--radius);
    overflow: hidden;
}

.table {
    border-radius: var(--radius-sm);
    overflow: hidden;
}

footer {
    margin-top: auto;
    background: var(--gray-900) !important;
}

.footer-link {
    transition: var(--transition);
    font-size: 0.88rem;
}

.footer-link:hover {
    color: #fff !important;
    padding-left: 4px;
}

footer a:hover {
    color: #fff !important;
}

#bmiIndicator {
    height: 20px;
}

.embed-code {
    font-family: monospace;
    font-size: 0.85rem;
    word-break: break-all;
}

.ho-search-wrapper {
    position: relative;
    width: 100%;
    max-width: 280px;
}

.ho-search-box {
    position: relative;
}

.ho-search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-500);
    font-size: 0.85rem;
    z-index: 2;
    pointer-events: none;
}

.ho-search-input {
    width: 100%;
    padding: 0.5rem 0.75rem 0.5rem 2.2rem;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50px;
    background: rgba(255,255,255,0.15);
    color: #fff;
    font-size: 0.85rem;
    font-family: inherit;
    outline: none;
    transition: var(--transition);
}

.ho-search-input::placeholder {
    color: rgba(255,255,255,0.6);
}

.ho-search-input:focus {
    background: rgba(255,255,255,0.95);
    color: var(--gray-900);
    border-color: transparent;
    box-shadow: 0 0 0 3px rgba(13,110,253,0.2);
}

.ho-search-input:focus + .ho-search-dropdown,
.ho-search-dropdown.active {
    display: block;
}

.ho-search-input:focus::placeholder {
    color: var(--gray-500);
}

.ho-search-input:focus ~ .ho-search-icon,
.ho-search-box:focus-within .ho-search-icon {
    color: var(--primary);
}

.ho-search-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    z-index: 1060;
    max-height: 380px;
    overflow-y: auto;
    min-width: 320px;
}

.ho-search-dropdown.active {
    display: block;
}

.ho-search-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.7rem 1rem;
    text-decoration: none;
    color: var(--gray-700);
    transition: var(--transition);
    border-bottom: 1px solid var(--gray-100);
}

.ho-search-item:last-child {
    border-bottom: none;
}

.ho-search-item:hover,
.ho-search-item.active {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.ho-search-item-icon {
    width: 36px;
    height: 36px;
    min-width: 36px;
    border-radius: var(--radius-sm);
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 0.9rem;
}

.ho-search-item:hover .ho-search-item-icon {
    background: var(--primary);
    color: #fff;
}

.ho-search-item-text strong {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--gray-900);
}

.ho-search-item-text small {
    font-size: 0.75rem;
    color: var(--gray-500);
    line-height: 1.3;
}

.ho-search-empty {
    padding: 1.5rem;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.88rem;
}

.ho-search-empty i {
    font-size: 1.5rem;
    display: block;
    margin-bottom: 0.5rem;
    opacity: 0.5;
}

.hero-search-wrapper {
    max-width: 560px;
    margin: 0 auto 2rem;
}

.ho-search-box--hero {
    position: relative;
}

.ho-search-input--hero {
    padding: 0.9rem 1.2rem 0.9rem 2.8rem;
    font-size: 1rem;
    border: 2px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
}

.ho-search-box--hero .ho-search-icon {
    left: 16px;
    font-size: 1rem;
    color: rgba(255,255,255,0.7);
}

.ho-search-input--hero:focus {
    background: #fff;
    border-color: #fff;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.ho-search-dropdown--hero {
    min-width: 100%;
    border-radius: var(--radius);
    box-shadow: 0 12px 40px rgba(0,0,0,0.15);
}

.ho-result-scroll-hint {
    display: none;
    background: linear-gradient(135deg, #dbeafe, #eff6ff);
    border: 1px solid #93c5fd;
    border-radius: var(--radius-sm);
    padding: 0.65rem 1rem;
    margin-bottom: 0.75rem;
    text-align: center;
    font-size: 0.88rem;
    font-weight: 600;
    color: #1e40af;
}

.ho-result-scroll-hint i {
    margin-right: 0.35rem;
}

@media (max-width: 991px) {
    .ho-search-wrapper {
        max-width: 100%;
        margin-top: 0.75rem;
    }
    .ho-search-dropdown {
        min-width: 100%;
    }
    .hero-title {
        font-size: 1.85rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-section {
        padding: 3rem 0 2.5rem;
    }
    .hero-badges {
        gap: 0.5rem;
    }
    .hero-badge {
        font-size: 0.78rem;
        padding: 0.5rem 0.9rem;
    }
    .ho-result-scroll-hint {
        display: block;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 1.55rem;
    }
    
    .nav-tabs .nav-link {
        font-size: 0.85rem;
        padding: 0.5rem;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }

    .popular-tool-pill {
        font-size: 0.82rem;
        padding: 0.5rem 1rem;
    }

    .category-card-home {
        padding: 1.1rem;
    }

    .seo-section {
        padding: 1.25rem;
    }

    .section-title {
        font-size: 1.15rem;
    }
}