/* =============================================================
   UseAI Studio — Design System
   Premium SaaS aesthetic inspired by Stripe / Linear / Vercel /
   Notion-grade product UX. Vanilla CSS, custom properties, Grid
   & Flexbox. No framework dependency.
   ============================================================= */

/* ---------- 1. Design Tokens ---------- */
:root {
	--useai-primary: #4F46E5;
	--useai-primary-dark: #4338CA;
	--useai-accent: #7C3AED;
	--useai-secondary: #06B6D4;
	--useai-bg: #F8FAFC;
	--useai-dark: #0F172A;
	--useai-card: #FFFFFF;
	--useai-text: #0F172A;
	--useai-text-muted: #64748B;
	--useai-border: #E2E8F0;
	--useai-success: #10B981;
	--useai-warning: #F59E0B;

	--useai-radius-sm: 10px;
	--useai-radius: 14px;
	--useai-radius-lg: 18px;
	--useai-radius-xl: 20px;
	--useai-radius-full: 999px;

	--useai-shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
	--useai-shadow: 0 4px 16px rgba(15, 23, 42, .08);
	--useai-shadow-lg: 0 20px 48px rgba(15, 23, 42, .12);
	--useai-shadow-glow: 0 8px 32px rgba(79, 70, 229, .25);

	--useai-gradient-primary: linear-gradient(135deg, var(--useai-primary), var(--useai-accent));
	--useai-gradient-hero: radial-gradient(1200px 600px at 20% -10%, rgba(124,58,237,.18), transparent), radial-gradient(1000px 500px at 90% 10%, rgba(6,182,212,.15), transparent);

	--useai-font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	--useai-font-display: 'Plus Jakarta Sans', var(--useai-font-body);

	--useai-container: 1240px;
	--useai-header-h: 76px;
	--useai-ease: cubic-bezier(.22, 1, .36, 1);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--useai-header-h) + 16px); overflow-x: hidden; }
body {
	margin: 0;
	font-family: var(--useai-font-body);
	color: var(--useai-text);
	background: var(--useai-bg);
	font-size: 16px;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; background: none; border: none; color: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }
h1, h2, h3, h4 { font-family: var(--useai-font-display); font-weight: 800; line-height: 1.15; margin: 0; letter-spacing: -0.02em; }
p { margin: 0; }
.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(1px,1px,1px,1px); }
.useai-skip-link { position: absolute; top: -100px; left: 8px; background: var(--useai-dark); color: #fff; padding: 10px 16px; border-radius: var(--useai-radius-sm); z-index: 9999; transition: top .2s var(--useai-ease); }
.useai-skip-link:focus { top: 8px; }

.useai-container { max-width: var(--useai-container); margin: 0 auto; padding: 0 24px; }

/* ---------- 3. Buttons & Badges ---------- */
.useai-btn {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 13px 24px; border-radius: var(--useai-radius-full);
	font-weight: 600; font-size: 15px; white-space: nowrap;
	transition: transform .18s var(--useai-ease), box-shadow .18s var(--useai-ease), background .18s var(--useai-ease);
}
.useai-btn svg { width: 16px; height: 16px; }
.useai-btn-primary { background: var(--useai-gradient-primary); color: #fff; box-shadow: var(--useai-shadow-glow); }
.useai-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(79,70,229,.35); }
.useai-btn-secondary { background: var(--useai-card); color: var(--useai-text); border: 1.5px solid var(--useai-border); }
.useai-btn-secondary:hover { border-color: var(--useai-primary); color: var(--useai-primary); transform: translateY(-2px); }
.useai-btn-sm { padding: 9px 16px; font-size: 13px; }
.useai-btn-block { width: 100%; justify-content: center; }

.useai-badge {
	display: inline-flex; align-items: center; padding: 5px 12px;
	border-radius: var(--useai-radius-full); font-size: 12px; font-weight: 700;
	background: #EEF2FF; color: var(--useai-primary);
}
.useai-badge-free { background: #ECFDF5; color: #059669; }
.useai-badge-paid { background: #FEF3F2; color: #DC2626; }
.useai-badge-freemium { background: #FFFBEB; color: #D97706; }

.useai-flag { display: inline-flex; align-items: center; gap: 4px; padding: 4px 10px; border-radius: var(--useai-radius-full); font-size: 11px; font-weight: 700; margin-right: 6px; }
.useai-flag svg { width: 12px; height: 12px; }
.useai-flag-verified { background: #EFF6FF; color: #2563EB; }
.useai-flag-trending { background: #FFF1F2; color: #E11D48; }
.useai-flag-featured { background: #FAF5FF; color: var(--useai-accent); }

.useai-icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; border-radius: 50%; background: var(--useai-card); border: 1.5px solid var(--useai-border); transition: all .18s var(--useai-ease); }
.useai-icon-btn:hover { border-color: var(--useai-primary); color: var(--useai-primary); }

/* ---------- 4. Header ---------- */
.useai-header {
	position: sticky; top: 0; z-index: 100; height: var(--useai-header-h);
	background: rgba(248,250,252,.72); backdrop-filter: blur(16px) saturate(160%);
	-webkit-backdrop-filter: blur(16px) saturate(160%);
	border-bottom: 1px solid rgba(226,232,240,.7);
	transition: box-shadow .2s var(--useai-ease);
}
.useai-header.is-scrolled { box-shadow: var(--useai-shadow-sm); }
.useai-header-inner { max-width: var(--useai-container); margin: 0 auto; height: 100%; padding: 0 24px; display: flex; align-items: center; gap: 32px; }
.useai-header-brand { flex-shrink: 0; }
.useai-logo-text { display: inline-flex; align-items: center; gap: 10px; font-family: var(--useai-font-display); font-weight: 800; font-size: 19px; }
.useai-logo-mark { width: 30px; height: 30px; border-radius: 9px; background: var(--useai-gradient-primary); display: inline-block; }
.useai-primary-nav { flex: 1; min-width: 0; }
.useai-menu { display: flex; align-items: center; gap: 4px; }
.useai-menu-item { position: relative; }
.useai-menu-link { display: inline-flex; align-items: center; gap: 4px; padding: 10px 14px; border-radius: var(--useai-radius-full); font-weight: 500; font-size: 14.5px; color: var(--useai-text-muted); transition: all .15s var(--useai-ease); }
.useai-menu-link svg { width: 14px; height: 14px; }
.useai-menu-link:hover { color: var(--useai-text); background: rgba(15,23,42,.04); }
.useai-header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.useai-header-search-trigger { display: flex; align-items: center; gap: 8px; padding: 9px 14px; border-radius: var(--useai-radius-full); border: 1.5px solid var(--useai-border); background: var(--useai-card); color: var(--useai-text-muted); font-size: 13.5px; }
.useai-header-search-trigger svg { width: 16px; height: 16px; }
.useai-header-search-label kbd { margin-left: 6px; padding: 1px 6px; background: var(--useai-bg); border-radius: 5px; font-size: 11px; border: 1px solid var(--useai-border); }
.useai-theme-toggle { position: relative; width: 40px; height: 40px; border-radius: 50%; border: 1.5px solid var(--useai-border); display: flex; align-items: center; justify-content: center; }
.useai-theme-toggle .icon-moon { display: none; }
.useai-menu-toggle { display: none; width: 40px; height: 40px; flex-direction: column; align-items: center; justify-content: center; gap: 4px; }
.useai-menu-toggle span { width: 20px; height: 2px; background: currentColor; border-radius: 2px; transition: transform .2s, opacity .2s; }

/* Mega menu */
.useai-menu-item.has-mega:hover .useai-mega-panel,
.useai-menu-item.has-mega:focus-within .useai-mega-panel { opacity: 1; visibility: visible; transform: translateY(0); }
.useai-mega-panel { position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%) translateY(6px); width: 560px; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); box-shadow: var(--useai-shadow-lg); opacity: 0; visibility: hidden; transition: all .18s var(--useai-ease); padding: 20px; }
.useai-mega-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 6px; }
.useai-mega-link { display: flex; justify-content: space-between; padding: 10px 12px; border-radius: var(--useai-radius-sm); font-size: 14px; font-weight: 500; }
.useai-mega-link:hover { background: var(--useai-bg); color: var(--useai-primary); }
.useai-mega-link span { color: var(--useai-text-muted); font-size: 12px; }
.useai-mega-viewall { display: flex; align-items: center; gap: 6px; margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--useai-border); font-weight: 600; color: var(--useai-primary); font-size: 14px; }

/* Search overlay */
.useai-search-overlay { position: fixed; inset: 0; z-index: 200; background: rgba(15,23,42,.5); backdrop-filter: blur(4px); display: flex; align-items: flex-start; justify-content: center; padding: 10vh 20px; height: 100vh; }
.useai-search-overlay[hidden] { display: none; }
.useai-search-panel { width: 100%; max-width: 640px; background: var(--useai-card); border-radius: var(--useai-radius-lg); box-shadow: var(--useai-shadow-lg); overflow: hidden; }
.useai-search-form { display: flex; align-items: center; gap: 12px; padding: 18px 22px; border-bottom: 1px solid var(--useai-border); }
.useai-search-form svg { flex-shrink: 0; color: var(--useai-text-muted); }
.useai-search-form input { flex: 1; border: none; outline: none; font-size: 17px; background: transparent; }
.useai-search-close { color: var(--useai-text-muted); }
.useai-search-results { max-height: 60vh; overflow-y: auto; }
.useai-search-result-item { display: flex; align-items: center; gap: 12px; padding: 12px 22px; border-bottom: 1px solid var(--useai-border); }
.useai-search-result-item:hover { background: var(--useai-bg); }
.useai-search-result-item img { width: 36px; height: 36px; border-radius: 8px; object-fit: cover; }
.useai-search-result-title { font-weight: 600; font-size: 14.5px; }
.useai-search-result-meta { font-size: 12.5px; color: var(--useai-text-muted); }
.useai-search-empty, .useai-search-loading { padding: 24px 22px; text-align: center; color: var(--useai-text-muted); font-size: 14px; }

.useai-mobile-menu { display: none; }

/* ---------- 5. Hero ---------- */
.useai-hero { position: relative; padding: 96px 24px 80px; overflow: hidden; text-align: center; }
.useai-hero-glow { position: absolute; inset: 0; background: var(--useai-gradient-hero); z-index: 0; }
.useai-hero-inner { position: relative; z-index: 1; max-width: 760px; margin: 0 auto; }
.useai-eyebrow { display: inline-flex; align-items: center; gap: 6px; padding: 7px 16px; border-radius: var(--useai-radius-full); background: var(--useai-card); border: 1px solid var(--useai-border); font-size: 13px; font-weight: 600; color: var(--useai-primary); box-shadow: var(--useai-shadow-sm); }
.useai-eyebrow svg { width: 14px; height: 14px; }
.useai-hero-title { font-size: clamp(2.4rem, 5vw, 3.8rem); margin: 24px 0 20px; }
.useai-hero-subtitle { font-size: 18px; color: var(--useai-text-muted); max-width: 600px; margin: 0 auto 40px; }

.useai-hero-search-form { position: relative; display: flex; align-items: center; gap: 10px; background: var(--useai-card); border: 1.5px solid var(--useai-border); border-radius: var(--useai-radius-full); padding: 8px 8px 8px 22px; box-shadow: var(--useai-shadow-lg); max-width: 620px; margin: 0 auto; }
.useai-hero-search-form svg { color: var(--useai-text-muted); flex-shrink: 0; }
.useai-hero-search-form input { flex: 1; border: none; outline: none; font-size: 13px; background: transparent; padding: 10px 0; }
.useai-hero-search-results { position: absolute; top: calc(100% + 10px); left: 0; right: 0; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius); box-shadow: var(--useai-shadow-lg); text-align: left; overflow: hidden; z-index: 20; display: none; }
.useai-hero-search-results.is-open { display: block; }

.useai-hero-tags { margin-top: 24px; font-size: 14px; color: var(--useai-text-muted); display: flex; align-items: center; justify-content: center; gap: 10px; flex-wrap: wrap; }
.useai-hero-tags a { padding: 5px 14px; border-radius: var(--useai-radius-full); background: var(--useai-card); border: 1px solid var(--useai-border); font-weight: 500; }
.useai-hero-tags a:hover { border-color: var(--useai-primary); color: var(--useai-primary); }

.useai-hero-stats { display: flex; justify-content: center; gap: 56px; margin-top: 56px; }
.useai-hero-stat { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.useai-counter { font-family: var(--useai-font-display); font-size: 32px; font-weight: 800; background: var(--useai-gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.useai-hero-stat span:last-child { font-size: 13px; color: var(--useai-text-muted); font-weight: 500; }

/* ---------- 6. Sections ---------- */
.useai-section { padding: 72px 24px; max-width: var(--useai-container); margin: 0 auto; }
.useai-section-alt { background: linear-gradient(180deg, transparent, rgba(79,70,229,.03), transparent); border-radius: var(--useai-radius-xl); }
.useai-section-header { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 32px; }
.useai-section-title { display: flex; align-items: center; gap: 10px; font-size: clamp(1.6rem, 3vw, 2.1rem); }
.useai-section-title svg { width: 24px; height: 24px; color: var(--useai-primary); }
.useai-section-subtitle { color: var(--useai-text-muted); margin-top: 6px; max-width: 480px; }
.useai-section-viewall { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--useai-primary); white-space: nowrap; }
.useai-section-viewall svg { width: 16px; height: 16px; }

/* ---------- 7. Tool Grid & Card ---------- */
.useai-tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 20px; }
.useai-tool-card { position: relative; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); padding: 22px; transition: transform .22s var(--useai-ease), box-shadow .22s var(--useai-ease), border-color .22s; }
.useai-tool-card:hover { transform: translateY(-6px); box-shadow: var(--useai-shadow-lg); border-color: transparent; }
.useai-favorite-btn { position: absolute; top: 18px; right: 18px; z-index: 2; width: 34px; height: 34px; border-radius: 50%; background: var(--useai-bg); display: flex; align-items: center; justify-content: center; color: var(--useai-text-muted); }
.useai-favorite-btn .icon-fill { display: none; color: #E11D48; }
.useai-favorite-btn[aria-pressed="true"] .icon-outline { display: none; }
.useai-favorite-btn[aria-pressed="true"] .icon-fill { display: block; }
.useai-tool-card-top { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 14px; }
.useai-tool-logo { width: 52px; height: 52px; border-radius: var(--useai-radius); overflow: hidden; background: var(--useai-bg); display: flex; align-items: center; justify-content: center; }
.useai-tool-logo img { width: 100%; height: 100%; object-fit: cover; }
.useai-tool-logo-fallback { font-family: var(--useai-font-display); font-weight: 800; font-size: 20px; color: var(--useai-primary); }
.useai-tool-logo-fallback-lg { font-size: 40px; width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.useai-tool-card-title { font-size: 18px; margin-bottom: 2px; }
.useai-tool-card-category { font-size: 12.5px; color: var(--useai-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; margin-bottom: 10px; }
.useai-tool-card-excerpt { font-size: 14px; color: var(--useai-text-muted); margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.useai-tool-card-flags { margin-bottom: 12px; }
.useai-tool-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 14px; border-top: 1px solid var(--useai-border); }
.useai-tool-card-rating { display: flex; align-items: center; gap: 6px; font-size: 13.5px; }
.useai-tool-card-rating svg { width: 15px; height: 15px; color: var(--useai-warning); }
.useai-tool-card-rating span { color: var(--useai-text-muted); }
.useai-tool-card-arrow { width: 30px; height: 30px; border-radius: 50%; background: var(--useai-bg); display: flex; align-items: center; justify-content: center; transition: background .2s, color .2s; }
.useai-tool-card:hover .useai-tool-card-arrow { background: var(--useai-primary); color: #fff; }
.useai-stars { display: inline-flex; gap: 1px; }
.useai-stars svg { width: 15px; height: 15px; color: var(--useai-warning); }
.useai-stars svg.is-empty { color: var(--useai-border); }

/* ---------- 8. Categories ---------- */
.useai-category-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.useai-category-card { display: flex; flex-direction: column; gap: 10px; padding: 24px; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); transition: all .2s var(--useai-ease); }
.useai-category-card:hover { transform: translateY(-4px); box-shadow: var(--useai-shadow); border-color: var(--useai-primary); }
.useai-category-icon { width: 46px; height: 46px; border-radius: var(--useai-radius); background: var(--useai-gradient-primary); display: flex; align-items: center; justify-content: center; color: #fff; }
.useai-category-name { font-weight: 700; font-size: 16px; }
.useai-category-count { font-size: 13px; color: var(--useai-text-muted); }

/* ---------- 9. Featured collections ---------- */
.useai-collection-showcase { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.useai-collection-feature-card { position: relative; display: block; border-radius: var(--useai-radius-lg); overflow: hidden; aspect-ratio: 4/3; background: var(--useai-dark); }
.useai-collection-feature-card img { width: 100%; height: 100%; object-fit: cover; opacity: .55; transition: transform .4s var(--useai-ease), opacity .3s; }
.useai-collection-feature-card:hover img { transform: scale(1.06); opacity: .4; }
.useai-collection-feature-overlay { position: absolute; inset: 0; padding: 24px; display: flex; flex-direction: column; justify-content: flex-end; gap: 8px; background: linear-gradient(180deg, transparent 30%, rgba(15,23,42,.9)); }
.useai-collection-feature-overlay h3 { color: #fff; font-size: 20px; }
.useai-collection-feature-overlay p { color: rgba(255,255,255,.8); font-size: 13.5px; }

/* ---------- 10. News ---------- */
.useai-news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.useai-news-card, .useai-generic-card { display: block; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); overflow: hidden; transition: all .2s var(--useai-ease); }
.useai-news-card:hover, .useai-generic-card:hover { transform: translateY(-4px); box-shadow: var(--useai-shadow); }
.useai-news-card img, .useai-generic-card img { aspect-ratio: 16/10; object-fit: cover; }
.useai-news-card-body, .useai-generic-card-body { padding: 18px 20px; }
.useai-news-date, .useai-generic-card-type { font-size: 12px; font-weight: 700; color: var(--useai-primary); text-transform: uppercase; letter-spacing: .04em; }
.useai-news-card-body h3, .useai-generic-card-body h3 { font-size: 16.5px; margin-top: 8px; }
.useai-generic-card-body p { margin-top: 8px; font-size: 14px; color: var(--useai-text-muted); }

/* ---------- 11. Newsletter ---------- */
.useai-newsletter { max-width: var(--useai-container); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; background: var(--useai-gradient-primary); border-radius: var(--useai-radius-xl); padding: 48px; color: #fff; }
.useai-newsletter-copy h3 { font-size: 24px; color: #fff; }
.useai-newsletter-copy p { color: rgba(255,255,255,.85); margin-top: 6px; }
.useai-newsletter-form { display: flex; gap: 10px; flex-wrap: wrap; position: relative; }
.useai-newsletter-form input { padding: 14px 20px; border-radius: var(--useai-radius-full); border: none; min-width: 260px; outline: none; }
.useai-newsletter-form .useai-btn-primary { background: var(--useai-dark); box-shadow: none; }
.useai-newsletter-message { position: absolute; top: 100%; left: 0; margin-top: 8px; font-size: 13.5px; color: #fff; }

/* ---------- 12. Footer ---------- */
.useai-footer { background: var(--useai-dark); color: rgba(255,255,255,.7); margin-top: 40px; }
.useai-footer-newsletter { padding: 56px 24px; }
.useai-footer-main { max-width: var(--useai-container); margin: 0 auto; padding: 40px 24px 32px; display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 32px; border-top: 1px solid rgba(255,255,255,.1); }
.useai-footer-brand p { margin-top: 12px; font-size: 14px; line-height: 1.7; }
.useai-footer .useai-logo-text { color: #fff; }
.useai-widget-title { color: #fff; font-size: 14px; margin-bottom: 14px; }
.useai-footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.useai-footer-col a { font-size: 14px; }
.useai-footer-col a:hover { color: #fff; }
.useai-social-icons { display: flex; gap: 10px; margin-top: 18px; }
.useai-social-icon { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,.08); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; }
.useai-footer-legal { max-width: var(--useai-container); margin: 0 auto; padding: 20px 24px 32px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; border-top: 1px solid rgba(255,255,255,.1); }
.useai-legal-menu { display: flex; gap: 20px; }

/* ---------- 13. Archive / filters ---------- */
.useai-page-head { padding: 48px 24px 32px; }
.useai-page-title { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
.useai-page-subtitle { color: var(--useai-text-muted); margin-top: 10px; font-size: 16px; }
.useai-archive-layout { display: grid; grid-template-columns: 260px 1fr; gap: 32px; padding-bottom: 80px; align-items: start; }
.useai-filters { background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); padding: 22px; position: sticky; top: calc(var(--useai-header-h) + 20px); }
.useai-filters-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px; }
.useai-filters-clear { font-size: 12.5px; color: var(--useai-primary); font-weight: 600; }
.useai-filter-group { margin-bottom: 22px; }
.useai-filter-group h4 { font-size: 13px; margin-bottom: 10px; text-transform: uppercase; letter-spacing: .04em; color: var(--useai-text-muted); }
.useai-filter-select { width: 100%; padding: 10px 12px; border-radius: var(--useai-radius-sm); border: 1.5px solid var(--useai-border); background: var(--useai-bg); }
.useai-filter-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.useai-chip { display: inline-flex; }
.useai-chip input { position: absolute; opacity: 0; }
.useai-chip span { padding: 7px 14px; border-radius: var(--useai-radius-full); border: 1.5px solid var(--useai-border); font-size: 13px; font-weight: 500; }
.useai-chip input:checked + span { background: var(--useai-primary); color: #fff; border-color: var(--useai-primary); }
.useai-checkbox { display: flex; align-items: center; gap: 8px; font-size: 14px; margin-bottom: 8px; }
.useai-archive-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; font-size: 14px; color: var(--useai-text-muted); }
.useai-filters-mobile-toggle { display: none; align-items: center; gap: 6px; padding: 8px 14px; border: 1.5px solid var(--useai-border); border-radius: var(--useai-radius-full); }
.useai-load-more-wrap { display: flex; justify-content: center; margin-top: 40px; }
.useai-no-results { text-align: center; padding: 80px 24px; color: var(--useai-text-muted); grid-column: 1 / -1; }
.useai-no-results svg { width: 48px; height: 48px; margin-bottom: 16px; color: var(--useai-border); }
.useai-no-results h3 { color: var(--useai-text); margin-bottom: 8px; }
.useai-no-results p { margin-bottom: 20px; }
.useai-pagination ul { display: flex; justify-content: center; gap: 6px; margin-top: 40px; }
.useai-pagination a, .useai-pagination span { display: flex; align-items: center; justify-content: center; min-width: 40px; height: 40px; border-radius: var(--useai-radius-sm); border: 1.5px solid var(--useai-border); font-weight: 600; font-size: 14px; }
.useai-pagination .current { background: var(--useai-primary); color: #fff; border-color: var(--useai-primary); }

/* ---------- 14. Breadcrumbs ---------- */
.useai-breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 6px; font-size: 13.5px; color: var(--useai-text-muted); }
.useai-breadcrumbs li:not(:last-child)::after { content: '/'; margin-left: 6px; color: var(--useai-border); }
.useai-breadcrumbs a:hover { color: var(--useai-primary); }

/* ---------- 15. Single Tool Page ---------- */
.useai-tool-hero { padding: 32px 0 48px; background: linear-gradient(180deg, rgba(79,70,229,.05), transparent); }
.useai-tool-hero-grid { display: grid; grid-template-columns: auto 1fr auto; gap: 28px; align-items: flex-start; }
.useai-tool-hero-logo { width: 96px; height: 96px; border-radius: var(--useai-radius-lg); overflow: hidden; background: var(--useai-card); border: 1px solid var(--useai-border); box-shadow: var(--useai-shadow); }
.useai-tool-hero-logo img { width: 100%; height: 100%; object-fit: cover; }
.useai-tool-hero-badges { display: flex; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
.useai-tool-hero-title { font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 10px; }
.useai-tool-hero-excerpt { color: var(--useai-text-muted); font-size: 16px; max-width: 640px; margin-bottom: 16px; }
.useai-tool-hero-meta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; font-size: 14px; color: var(--useai-text-muted); margin-bottom: 22px; }
.useai-tool-hero-rating { display: flex; align-items: center; gap: 6px; }
.useai-tool-hero-category { font-weight: 600; color: var(--useai-primary); }
.useai-cta-group { display: flex; gap: 12px; flex-wrap: wrap; }
.useai-tool-hero-actions { display: flex; gap: 10px; }

.useai-tool-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; padding-bottom: 80px; }
.useai-tool-tabs { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 12px; margin-bottom: 32px; border-bottom: 1px solid var(--useai-border); }
.useai-tool-tabs a { padding: 10px 16px; border-radius: var(--useai-radius-full); font-weight: 600; font-size: 14px; color: var(--useai-text-muted); white-space: nowrap; }
.useai-tool-tabs a:hover { background: var(--useai-bg); color: var(--useai-text); }
.useai-tool-block { margin-bottom: 48px; scroll-margin-top: calc(var(--useai-header-h) + 20px); }
.useai-tool-block h2 { font-size: 22px; margin-bottom: 18px; }
.useai-tool-description { color: var(--useai-text); font-size: 15.5px; line-height: 1.8; }
.useai-tool-description p { margin-bottom: 16px; }
.useai-video-embed { border-radius: var(--useai-radius-lg); overflow: hidden; }
.useai-video-embed iframe { width: 100%; aspect-ratio: 16/9; }

.useai-feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; }
.useai-feature-item { display: flex; align-items: center; gap: 8px; padding: 12px 14px; background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-sm); font-size: 14px; font-weight: 500; }
.useai-feature-item svg { width: 16px; height: 16px; color: var(--useai-success); flex-shrink: 0; }

.useai-pricing-card { background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); padding: 28px; }
.useai-tool-extra-links { display: flex; gap: 20px; margin-top: 18px; }
.useai-tool-extra-links a { display: flex; align-items: center; gap: 6px; font-weight: 600; font-size: 14px; color: var(--useai-text-muted); }
.useai-tool-extra-links a:hover { color: var(--useai-primary); }

.useai-screenshot-gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; }
.useai-screenshot-thumb { display: block; border-radius: var(--useai-radius); overflow: hidden; border: 1px solid var(--useai-border); aspect-ratio: 16/10; }
.useai-screenshot-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s var(--useai-ease); }
.useai-screenshot-thumb:hover img { transform: scale(1.05); }

.useai-pros-cons-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.useai-pros, .useai-cons { background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); padding: 22px; }
.useai-pros h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; color: var(--useai-success); margin-bottom: 14px; }
.useai-cons h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; color: #DC2626; margin-bottom: 14px; }
.useai-pros h3 svg, .useai-cons h3 svg { width: 16px; height: 16px; }
.useai-pros ul li, .useai-cons ul li { padding: 8px 0; font-size: 14.5px; border-bottom: 1px solid var(--useai-border); }
.useai-pros ul li:last-child, .useai-cons ul li:last-child { border-bottom: none; }

.useai-faq-list { display: flex; flex-direction: column; gap: 10px; }
.useai-faq-item { background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius); padding: 18px 20px; }
.useai-faq-item summary { display: flex; justify-content: space-between; align-items: center; font-weight: 600; cursor: pointer; list-style: none; }
.useai-faq-item summary::-webkit-details-marker { display: none; }
.useai-faq-item summary svg { width: 18px; height: 18px; transition: transform .2s; flex-shrink: 0; }
.useai-faq-item[open] summary svg { transform: rotate(180deg); }
.useai-faq-answer { margin-top: 12px; color: var(--useai-text-muted); font-size: 14.5px; line-height: 1.7; }

.useai-reviews-header { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; margin-bottom: 24px; }
.useai-reviews-header h2 { font-size: 22px; }
.useai-reviews-summary { display: flex; align-items: center; gap: 14px; }
.useai-reviews-score { font-size: 32px; font-weight: 800; font-family: var(--useai-font-display); }
.useai-reviews-summary p { font-size: 13px; color: var(--useai-text-muted); }

.useai-tool-sidebar { position: sticky; top: calc(var(--useai-header-h) + 20px); align-self: start; display: flex; flex-direction: column; gap: 20px; }
.useai-sidebar-card { background: var(--useai-card); border: 1px solid var(--useai-border); border-radius: var(--useai-radius-lg); padding: 24px; }
.useai-sidebar-cta h3 { font-size: 17px; margin-bottom: 16px; }
.useai-sidebar-cta-buttons { flex-direction: column; }
.useai-sidebar-cta-buttons .useai-btn { justify-content: center; width: 100%; }
.useai-sidebar-credits { margin-top: 12px; font-size: 13px; color: var(--useai-text-muted); text-align: center; }
.useai-glance-list li { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--useai-border); font-size: 14px; }
.useai-glance-list li:last-child { border-bottom: none; }
.useai-glance-list span { color: var(--useai-text-muted); }

/* ---------- 16. Comments / reviews ---------- */
.useai-comments { margin-top: 40px; }
.useai-comment-list > li { display: flex; gap: 14px; padding: 20px 0; border-bottom: 1px solid var(--useai-border); }
.useai-comment-list img { border-radius: 50%; }
.useai-comment-form p { margin-bottom: 14px; }
.useai-comment-form label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.useai-comment-form input, .useai-comment-form textarea { width: 100%; padding: 12px 14px; border: 1.5px solid var(--useai-border); border-radius: var(--useai-radius-sm); }
.useai-comment-form .form-submit input { width: auto; background: var(--useai-gradient-primary); color: #fff; border: none; border-radius: var(--useai-radius-full); padding: 12px 28px; font-weight: 600; }

/* ---------- 17. Generic pages / 404 ---------- */
.useai-prose { max-width: 820px; margin: 0 auto 60px; font-size: 16px; line-height: 1.8; }
.useai-prose h2, .useai-prose h3 { margin: 32px 0 14px; }
.useai-prose p { margin-bottom: 18px; }
.useai-prose img { border-radius: var(--useai-radius); margin: 20px 0; }
.useai-404 { text-align: center; padding: 100px 24px; }
.useai-404-code { font-family: var(--useai-font-display); font-size: 96px; font-weight: 800; background: var(--useai-gradient-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.useai-404 h1 { font-size: 28px; margin: 16px 0 12px; }
.useai-404 p { color: var(--useai-text-muted); margin-bottom: 32px; }
.useai-404-search { max-width: 480px; margin: 0 auto 24px; display: flex; align-items: center; gap: 10px; border: 1.5px solid var(--useai-border); border-radius: var(--useai-radius-full); padding: 8px 8px 8px 20px; background: var(--useai-card); }
.useai-404-search input { flex: 1; border: none; outline: none; background: transparent; }
.useai-404-links { display: flex; justify-content: center; gap: 12px; }

/* ---------- 18. Animations ---------- */
@keyframes useaiFadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.useai-fade-up-group > * { opacity: 0; animation: useaiFadeUp .6s var(--useai-ease) forwards; }
.useai-fade-up-group > *:nth-child(1) { animation-delay: .02s; }
.useai-fade-up-group > *:nth-child(2) { animation-delay: .06s; }
.useai-fade-up-group > *:nth-child(3) { animation-delay: .1s; }
.useai-fade-up-group > *:nth-child(4) { animation-delay: .14s; }
.useai-fade-up-group > *:nth-child(5) { animation-delay: .18s; }
.useai-fade-up-group > *:nth-child(6) { animation-delay: .22s; }
.useai-fade-up-group > *:nth-child(n+7) { animation-delay: .26s; }
@media (prefers-reduced-motion: reduce) {
	*, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior: auto !important; }
}

/* ---------- 19. Responsive ---------- */
@media (max-width: 1024px) {
	.useai-archive-layout, .useai-tool-layout { grid-template-columns: 1fr; }
	.useai-tool-sidebar { position: static; }
	.useai-filters { position: static; display: none; }
	.useai-filters.is-open { display: block; }
	.useai-filters-mobile-toggle { display: flex; }
	.useai-footer-main { grid-template-columns: 1fr 1fr; }
	.useai-collection-showcase { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
	.useai-header-inner { gap: 12px; padding: 0 16px;  justify-content: space-between;}
	.useai-primary-nav, .useai-header-search-label, .useai-header-cta { display: none; }
	.useai-header-actions { gap: 6px; }
	.useai-logo-text { font-size: 16px; gap: 8px; }
	.useai-logo-mark { width: 26px; height: 26px; }
	.useai-header-search-trigger { padding: 9px; }
	.useai-menu-toggle { display: flex; }
	.useai-mobile-menu { display: block; position: fixed; top: var(--useai-header-h); left: 0; right: 0; bottom: 0; background: var(--useai-bg); z-index: 90; padding: 24px; overflow-y: auto; }
	.useai-mobile-menu[hidden] { display: none; }
	.useai-mobile-menu-list { display: flex; flex-direction: column; gap: 4px; margin-bottom: 20px; }
	.useai-mobile-menu-list a { display: block; padding: 14px 6px; font-weight: 600; font-size: 17px; border-bottom: 1px solid var(--useai-border); }
	.useai-tool-hero-grid { grid-template-columns: 1fr; }
	.useai-tool-hero-actions { order: -1; justify-content: flex-end; }
	.useai-hero-stats { gap: 32px; }
	.useai-pros-cons-grid { grid-template-columns: 1fr; }
	.useai-footer-main { grid-template-columns: 1fr; }
	.useai-footer-newsletter { padding: 40px 16px; }
	.useai-footer-main { padding: 32px 16px 24px; gap: 28px; }
	.useai-footer-legal { padding: 16px 16px 24px; flex-direction: column; align-items: flex-start; }
	.useai-legal-menu { flex-wrap: wrap; gap: 12px 16px; }
}
@media (max-width: 560px) {
	.useai-container { padding: 0 16px; }
	.useai-hero { padding: 64px 20px 56px; }
	.useai-hero-search-form { flex-wrap: nowrap; padding: 8px 8px 8px 16px; }
	.useai-hero-search-form button { width: 100%; justify-content: center; order: 3; }
	.useai-hero-stats { gap: 20px; flex-wrap: wrap; }
	.useai-newsletter { padding: 32px 20px; }
	.useai-newsletter-form input { min-width: 0; width: 100%; }
	.useai-newsletter-form { width: 100%; }
	.useai-newsletter-form button { width: 100%; justify-content: center; }
	.useai-social-icons { flex-wrap: wrap; }
}