/* ===== RESET & BASE ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-white: #FFFFFF;
    --bg-gray: #F8F9FA;
    --primary: #0F172A;
    --accent: #1E8A5E;
    --accent-light: #E2F5ED;
    --border: #E2E8F0;
    --text-body: #475569;
    --text-muted: #94A3B8;
    --warning: #D97706;
    --warning-light: #FEF3C7;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06), 0 2px 4px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 8px 24px rgba(15, 23, 42, 0.08), 0 4px 8px rgba(15, 23, 42, 0.04);
    --transition: 200ms ease;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-body);
    background: var(--bg-white);
}

a {
    color: inherit;
    text-decoration: none;
}

ul,
ol {
    list-style: none;
}

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

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--primary);
    letter-spacing: -0.02em;
    line-height: 1.25;
}

h1 {
    font-size: 2.75rem;
    font-weight: 800;
}

h2 {
    font-size: 1.75rem;
    font-weight: 700;
}

h3 {
    font-size: 1.35rem;
    font-weight: 700;
}

h4 {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ===== HEADER ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--primary);
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.site-logo .logo-mark {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.site-logo .logo-mark svg {
    color: #fff;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.site-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-body);
    transition: color var(--transition);
}

.site-nav a:hover {
    color: var(--primary);
}

.nav-cta {
    background: var(--primary) !important;
    color: #fff !important;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600 !important;
    transition: opacity var(--transition) !important;
}

.nav-cta:hover {
    opacity: 0.88;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    padding: 4px;
}

/* ===== PAGE CONTENT (subpages) ===== */
.page-content {
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.page-content h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.page-content h2 {
    font-size: 1.35rem;
    margin-top: 32px;
    margin-bottom: 12px;
}

.page-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 24px;
    margin-bottom: 8px;
}

.page-subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.page-content p {
    margin-bottom: 16px;
}

.page-content ul {
    margin-bottom: 16px;
    padding-left: 24px;
    list-style: disc;
}

.page-content li {
    margin-bottom: 8px;
}

/* Contact email */
.contact-email {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 16px 24px;
    margin-top: 8px;
    margin-bottom: 24px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
}

.contact-email svg {
    color: var(--accent);
    flex-shrink: 0;
}

/* ===== FOOTER ===== */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 40px 24px;
    background: var(--bg-gray);
}

.footer-inner {
    max-width: 1320px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition);
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
    }

    .site-nav {
        display: none;
    }

    .site-nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border);
        padding: 20px 16px;
        gap: 16px;
        box-shadow: var(--shadow-md);
    }

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

    h1 {
        font-size: 1.5rem;
    }

    .page-content {
        padding: 32px 16px 60px;
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* ===== FILTER BAR (shared) ===== */
.filter-section {
    border-bottom: 1px solid var(--border);
    background: var(--bg-white);
    position: sticky;
    top: 64px;
    z-index: 90;
}

.filter-inner {
    max-width: 1320px;
    margin: 0 auto;
    padding: 10px 24px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

.filter-pill {
    background: var(--bg-white);
    border: 1px solid var(--border);
    padding: 5px 13px;
    border-radius: 100px;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-body);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    flex-shrink: 0;
    scroll-snap-align: start;
    text-decoration: none;
}

.filter-pill:hover {
    border-color: var(--accent);
    color: var(--primary);
}

.filter-pill.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* --- Mobile filter toggle --- */
.filter-toggle-btn {
    display: none;
    position: fixed;
    bottom: 24px;
    right: 20px;
    z-index: 100;
    height: 44px;
    padding: 0 16px 0 12px;
    border-radius: 100px;
    background: var(--primary);
    color: #fff;
    border: none;
    box-shadow: 0 4px 20px rgba(30, 41, 59, 0.25);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.25s ease;
    animation: filterPulse 2s ease-in-out 1s 2;
}

.filter-toggle-btn:hover {
    background: var(--accent);
    transform: scale(1.05);
    box-shadow: 0 6px 24px rgba(30, 41, 59, 0.3);
}

.filter-toggle-btn.active {
    background: var(--accent);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.filter-toggle-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.filter-toggle-label {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

@keyframes filterPulse {

    0%,
    100% {
        box-shadow: 0 4px 20px rgba(30, 41, 59, 0.25);
    }

    50% {
        box-shadow: 0 4px 20px rgba(30, 41, 59, 0.25), 0 0 0 8px rgba(59, 130, 246, 0.15);
    }
}

@media (max-width: 768px) {

    /* On mobile, filter is hidden by default */
    .filter-section.collapsible {
        position: fixed;
        top: auto;
        bottom: 76px;
        right: 16px;
        left: auto;
        width: calc(100vw - 32px);
        max-width: 300px;
        max-height: 60vh;
        overflow-y: auto;
        border-radius: var(--radius);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
        border: 1px solid var(--border);
        z-index: 99;
        transform: scale(0.9) translateY(10px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s, transform 0.2s;
    }

    .filter-section.collapsible.open {
        transform: scale(1) translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .filter-section.collapsible .filter-inner {
        padding: 16px;
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        flex-wrap: nowrap;
    }

    .filter-section.collapsible .filter-label {
        width: 100%;
        margin-bottom: 4px;
        font-size: 0.85rem;
        padding-left: 4px;
    }

    .filter-section.collapsible .filter-pill {
        font-size: 0.95rem;
        padding: 12px 16px;
        width: 100%;
        text-align: left;
        border-radius: 8px;
    }

    .filter-toggle-btn {
        display: flex;
    }
}

/* ===== MAIN LAYOUT (shared) ===== */
.main-layout {
    max-width: 1320px;
    margin: 0 auto;
    padding: 40px 24px 80px;
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 40px;
    align-items: start;
}

/* ===== AD SLOTS (shared) ===== */
.ad-slot {
    background: var(--bg-gray);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.ad-slot-leaderboard {
    width: 100%;
    min-height: 100px;
}

.ad-slot-sidebar {
    width: 100%;
    min-height: 280px;
}

.ad-slot-sidebar.tall {
    min-height: 600px;
}

.ad-slot-inline-mobile {
    display: none;
    width: 100%;
    min-height: 100px;
}

/* ===== SIDEBAR (shared) ===== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-sticky {
    position: sticky;
    top: 140px;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-block {
    background: var(--bg-gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
}

.sidebar-block h4 {
    margin-bottom: 12px;
    font-size: 0.95rem;
}

.sidebar-block p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.sidebar-input-group {
    display: flex;
    gap: 8px;
}

.sidebar-input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.875rem;
    color: var(--primary);
    background: var(--bg-white);
    outline: none;
    transition: border-color var(--transition);
}

.sidebar-input:focus {
    border-color: var(--accent);
}

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

.sidebar-btn {
    padding: 10px 18px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity var(--transition);
    white-space: nowrap;
}

.sidebar-btn:hover {
    opacity: 0.88;
}

.popular-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.popular-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
    cursor: pointer;
}

.popular-item:hover {
    background: rgba(15, 23, 42, 0.03);
}

.popular-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent);
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.popular-info {
    flex: 1;
    min-width: 0;
}

.popular-name {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
}

.popular-cat {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.popular-arrow {
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform var(--transition);
}

.popular-item:hover .popular-arrow {
    transform: translateX(2px);
}

/* ===== TOOL OUTBOUND LINKS ===== */
.tool-link-wrapper {
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.tool-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--bg-white);
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid rgba(30, 138, 94, 0.25);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.tool-link-btn:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
}

.tool-link-btn svg {
    width: 14px;
    height: 14px;
}

/* ===== READ MORE LINK (main page cards) ===== */
.read-more-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
    text-decoration: none;
    transition: gap var(--transition), color var(--transition);
}

.read-more-link:hover {
    gap: 8px;
    color: var(--primary);
}

.read-more-link svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition);
}

.read-more-link:hover svg {
    transform: translateX(2px);
}

/* ===== MOBILE ARTICLE NAV (category pages) ===== */
.mobile-article-nav {
    display: none;
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 24px 8px;
}

.mobile-article-nav select {
    width: 100%;
    padding: 10px 36px 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    color: var(--primary);
    background: var(--bg-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 12px center;
    background-size: 14px;
    cursor: pointer;
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.mobile-article-nav select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* ===== SHARED RESPONSIVE (layout, sidebar, ads) ===== */
@media (max-width: 1200px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        display: none;
    }

    .mobile-article-nav {
        display: block;
    }
}

@media (max-width: 768px) {
    .main-layout {
        padding: 24px 16px 60px;
        gap: 20px;
    }

    .ad-slot-inline-mobile {
        display: flex;
        border-radius: var(--radius-sm);
        min-height: 80px;
    }

    .ad-slot-leaderboard {
        display: none;
    }

    .mobile-article-nav {
        padding: 0 16px 8px;
    }
}

/* ===== CATEGORY DETAIL PAGES ===== */
.breadcrumb {
    max-width: 1320px;
    margin: 0 auto;
    padding: 16px 24px 0;
    font-size: 0.82rem;
    color: var(--text-muted);
}

.breadcrumb a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

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

.breadcrumb .sep {
    margin: 0 6px;
}

/* Category Hero */
.category-hero {
    max-width: 1320px;
    margin: 0 auto;
    padding: 24px 24px 32px;
}

.category-hero h1 {
    font-size: 2rem;
    margin-bottom: 8px;
}

.category-hero .hero-subtitle {
    font-size: 1rem;
    color: var(--text-body);
    max-width: 680px;
    line-height: 1.7;
}

/* Tool Detail Sections */
.tool-detail {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px;
    margin-bottom: 32px;
}

.tool-detail h2 {
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.tool-detail .tool-maker {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.tool-detail h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-top: 24px;
    margin-bottom: 8px;
    color: var(--primary);
}

.tool-detail h3.strengths {
    color: var(--accent);
}

.tool-detail h3.limitations {
    color: var(--warning);
}

.tool-detail p {
    margin-bottom: 14px;
    line-height: 1.75;
}

.tool-detail ul {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 14px;
}

.tool-detail li {
    margin-bottom: 6px;
    line-height: 1.65;
}

/* Benchmark highlight box */
.benchmark-box {
    background: var(--bg-gray);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px 20px;
    margin: 16px 0;
}

.benchmark-box .bench-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin-bottom: 8px;
}

.benchmark-box p,
.benchmark-box ul {
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.bench-desc {
    display: block;
    font-size: 0.78rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 2px;
    line-height: 1.45;
}

/* Source links */
.source-links {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.source-links h4 {
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.source-links a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.82rem;
    color: var(--accent);
    text-decoration: none;
    margin-right: 16px;
    margin-bottom: 6px;
    transition: color var(--transition);
}

.source-links a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Verdict block */
.verdict {
    background: var(--accent-light);
    border-left: 3px solid var(--accent);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    padding: 16px 20px;
    margin-top: 20px;
}

.verdict strong {
    font-family: 'Plus Jakarta Sans', sans-serif;
    color: var(--primary);
}

.verdict p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

/* Category page responsive */
@media (max-width: 768px) {
    .category-hero {
        padding: 16px 16px 24px;
    }

    .category-hero h1 {
        font-size: 1.5rem;
    }

    .tool-detail {
        padding: 20px;
    }

    .breadcrumb {
        padding: 12px 16px 0;
    }
}