/* TimingFlow Marketing — Design System
   Inspired by Linear, Vercel, Stripe */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ─── Tokens ─── */
:root {
  --bg-body: #0B0F1A;
  --bg-card: #131825;
  --bg-card-hover: #1A2035;
  --bg-surface: #0F1320;
  --bg-nav: rgba(11,15,26,.85);
  --border: rgba(255,255,255,.08);
  --border-hover: rgba(255,255,255,.15);
  --primary: #3B82F6;
  --primary-hover: #2563EB;
  --primary-glow: rgba(59,130,246,.25);
  --accent: #8B5CF6;
  --accent-glow: rgba(139,92,246,.25);
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;
  --text: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --gradient-hero: linear-gradient(135deg, #0B0F1A 0%, #1E1B4B 50%, #0B0F1A 100%);
  --gradient-primary: linear-gradient(135deg, #3B82F6, #8B5CF6);
  --gradient-card: linear-gradient(135deg, rgba(59,130,246,.08), rgba(139,92,246,.05));
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-card: 0 4px 24px rgba(0,0,0,.3);
  --shadow-glow: 0 0 40px var(--primary-glow);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --transition: .2s ease;
  --max-width: 1200px;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); background: var(--bg-body); color: var(--text); line-height: 1.6; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* ─── Typography ─── */
h1 { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; letter-spacing: -.03em; }
h2 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; line-height: 1.15; letter-spacing: -.02em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.125rem; font-weight: 600; }
p { color: var(--text-secondary); font-size: 1.125rem; }

/* ─── Layout ─── */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; }
.section-header { text-align: center; max-width: 720px; margin: 0 auto 64px; }
.section-header .badge { display: inline-block; padding: 6px 16px; border-radius: 20px; font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; background: var(--gradient-card); border: 1px solid var(--border); color: var(--primary); }
.section-header p { margin-top: 16px; }
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ─── Navigation ─── */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 16px 0; background: var(--bg-nav); backdrop-filter: blur(20px); border-bottom: 1px solid transparent; transition: border-color var(--transition); }
.nav.scrolled { border-bottom-color: var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 0 24px; }
.nav-logo { font-size: 1.35rem; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.nav-logo .logo-icon { width: 32px; height: 32px; background: var(--gradient-primary); border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: .9rem; color: #fff; }
.nav-links { display: flex; align-items: center; gap: 8px; }
.nav-links a { padding: 8px 14px; border-radius: var(--radius-sm); font-size: .9rem; font-weight: 500; color: var(--text-secondary); transition: color var(--transition), background var(--transition); }
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,.05); }
.nav-dropdown { position: relative; }
.nav-dropdown-trigger { cursor: pointer; display: flex; align-items: center; gap: 4px; }
.nav-dropdown-trigger::after { content: '▾'; font-size: .7rem; opacity: .5; }
.nav-dropdown-menu { position: absolute; top: 100%; left: 50%; transform: translateX(-50%) translateY(4px); opacity: 0; pointer-events: none; min-width: 220px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 8px; box-shadow: var(--shadow-card); transition: opacity .15s, transform .15s; }
.nav-dropdown-menu::before { content: ''; position: absolute; top: -16px; left: 0; right: 0; height: 16px; }
.nav-dropdown:hover .nav-dropdown-menu { opacity: 1; pointer-events: auto; transform: translateX(-50%) translateY(0); }
.nav-dropdown-menu a { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--radius-sm); font-size: .875rem; }
.nav-dropdown-menu a .dd-icon { width: 28px; height: 28px; border-radius: 6px; display: flex; align-items: center; justify-content: center; font-size: .8rem; background: var(--gradient-card); border: 1px solid var(--border); flex-shrink: 0; }
.nav-dropdown-menu a:hover { background: rgba(255,255,255,.05); }
.nav-cta { display: flex; align-items: center; gap: 8px; }
.mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.5rem; cursor: pointer; padding: 8px; }

/* ─── Buttons ─── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; border-radius: var(--radius-sm); font-family: var(--font); font-size: .9rem; font-weight: 600; border: none; cursor: pointer; transition: all var(--transition); white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 2px 8px var(--primary-glow); }
.btn-primary:hover { background: var(--primary-hover); box-shadow: var(--shadow-glow); transform: translateY(-1px); }
.btn-secondary { background: rgba(255,255,255,.06); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: rgba(255,255,255,.1); border-color: var(--border-hover); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { color: var(--text); }
.btn-lg { padding: 16px 32px; font-size: 1rem; border-radius: var(--radius-md); }
.btn-sm { padding: 8px 16px; font-size: .8rem; }

/* ─── Cards ─── */
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 32px; transition: all .3s ease; }
.card:hover { border-color: var(--border-hover); transform: translateY(-2px); box-shadow: var(--shadow-card); }
.card-icon { width: 48px; height: 48px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.3rem; margin-bottom: 20px; background: var(--gradient-card); border: 1px solid var(--border); }
.card h3 { margin-bottom: 8px; }
.card p { font-size: .95rem; }
.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 16px; font-size: .875rem; font-weight: 500; color: var(--primary); }
.card-link:hover { gap: 10px; }
.card-featured { grid-column: span 2; background: var(--gradient-card); border-color: var(--border-hover); }
.card-featured .card-icon { width: 56px; height: 56px; font-size: 1.5rem; }
.card-featured h3 { font-size: 1.3rem; }
.card-featured p { font-size: 1rem; }
.card-small { padding: 20px; }
.card-small .card-icon { width: 36px; height: 36px; font-size: 1rem; margin-bottom: 12px; }
.card-small h3 { font-size: .95rem; }
.card-small p { font-size: .85rem; color: var(--text-secondary); }

/* ─── Hero ─── */
.hero { padding: 160px 0 100px; background: var(--gradient-hero); position: relative; overflow: hidden; text-align: center; }
.hero::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 800px; height: 600px; background: radial-gradient(ellipse, var(--primary-glow) 0%, transparent 70%); pointer-events: none; }
.hero h1 { max-width: 800px; margin: 0 auto; }
.hero h1 .gradient-text { background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero .subtitle { max-width: 600px; margin: 20px auto 0; font-size: 1.2rem; }
.hero-ctas { display: flex; gap: 12px; justify-content: center; margin-top: 40px; }
.hero-visual { margin-top: 64px; position: relative; max-width: 1000px; margin-left: auto; margin-right: auto; }
.hero-visual .browser-frame { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.hero-visual .browser-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.hero-visual .browser-dot { width: 10px; height: 10px; border-radius: 50%; }
.hero-visual .browser-dot:nth-child(1) { background: #EF4444; }
.hero-visual .browser-dot:nth-child(2) { background: #F59E0B; }
.hero-visual .browser-dot:nth-child(3) { background: #10B981; }
.hero-visual .screenshot { width: 100%; aspect-ratio: 16/9; background: var(--bg-surface); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: .9rem; }

/* ─── Stats Bar ─── */
.stats-bar { padding: 48px 0; border-bottom: 1px solid var(--border); }
.stats-bar .grid { text-align: center; }
.stat-number { font-size: 2.5rem; font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.stat-label { font-size: .875rem; color: var(--text-muted); margin-top: 4px; }

/* ─── Feature Showcase ─── */
.feature-showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature-showcase.reverse { direction: rtl; }
.feature-showcase.reverse > * { direction: ltr; }
.feature-showcase .feature-content { }
.feature-showcase .feature-content .badge { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 12px; background: var(--gradient-card); border: 1px solid var(--border); color: var(--primary); }
.feature-showcase .feature-visual { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg); aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: .9rem; overflow: hidden; }
.feature-list { list-style: none; margin-top: 20px; }
.feature-list li { display: flex; gap: 10px; padding: 8px 0; color: var(--text-secondary); font-size: .95rem; }
.feature-list li::before { content: '✓'; color: var(--success); font-weight: 700; flex-shrink: 0; }

/* ─── Logo Cloud ─── */
.logo-cloud { padding: 48px 0; border-top: 1px solid var(--border); text-align: center; }
.logo-cloud p { font-size: .85rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .1em; margin-bottom: 24px; }
.logo-cloud .logos { display: flex; align-items: center; justify-content: center; gap: 48px; flex-wrap: wrap; opacity: .4; }

/* ─── Pricing ─── */
.pricing-card { text-align: center; padding: 40px 32px; position: relative; display: flex; flex-direction: column; }
.pricing-card.featured { border-color: var(--primary); box-shadow: 0 0 30px var(--primary-glow); }
.pricing-card.featured::before { content: 'Most Popular'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--gradient-primary); color: #fff; padding: 4px 16px; border-radius: 12px; font-size: .75rem; font-weight: 600; white-space: nowrap; }
.pricing-card .price { font-size: 3rem; font-weight: 800; margin: 16px 0 4px; }
.pricing-card .price span { font-size: 1rem; font-weight: 500; color: var(--text-muted); }
.pricing-card .price .currency { font-size: 1.5rem; vertical-align: super; margin-right: 2px; }
.pricing-card .price .was { font-size: 1rem; font-weight: 400; color: var(--text-muted); text-decoration: line-through; display: block; margin-top: -4px; }
.pricing-card .period { color: var(--text-muted); font-size: .9rem; }
.pricing-card .plan-includes { font-size: .8rem; color: var(--primary); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin: 20px 0 8px; text-align: left; }
.pricing-card ul { margin: 0 0 24px; text-align: left; }
.pricing-card ul li { display: flex; gap: 8px; padding: 5px 0; font-size: .875rem; color: var(--text-secondary); }
.pricing-card ul li::before { content: '✓'; color: var(--success); font-weight: 600; flex-shrink: 0; }
.pricing-card ul li.disabled { opacity: .4; }
.pricing-card ul li.disabled::before { content: '—'; color: var(--text-muted); }
.pricing-card .btn { width: 100%; margin-top: auto; }

/* Pricing toggle */
.pricing-toggle { display: flex; align-items: center; justify-content: center; gap: 12px; margin-bottom: 48px; }
.pricing-toggle span { font-size: .95rem; color: var(--text-muted); font-weight: 500; transition: color var(--transition); }
.pricing-toggle span.active { color: var(--text); }
.pricing-toggle .toggle-switch { width: 52px; height: 28px; background: var(--bg-card); border: 1px solid var(--border); border-radius: 14px; position: relative; cursor: pointer; transition: background var(--transition); }
.pricing-toggle .toggle-switch::after { content: ''; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; background: var(--primary); border-radius: 50%; transition: transform var(--transition); }
.pricing-toggle .toggle-switch.annual::after { transform: translateX(24px); }
.pricing-toggle .save-badge { font-size: .75rem; font-weight: 600; color: var(--success); background: rgba(16,185,129,.12); padding: 3px 10px; border-radius: 10px; }

/* 4-col pricing grid */
.grid-pricing { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }

/* Add-on cards */
.addon-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.addon-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 20px; display: flex; align-items: center; gap: 16px; transition: border-color var(--transition); }
.addon-card:hover { border-color: var(--border-hover); }
.addon-card .addon-price { font-size: 1.25rem; font-weight: 700; white-space: nowrap; color: var(--text); }
.addon-card .addon-price span { font-size: .8rem; font-weight: 400; color: var(--text-muted); }
.addon-card .addon-info h4 { font-size: .95rem; margin-bottom: 2px; }
.addon-card .addon-info p { font-size: .8rem; color: var(--text-muted); margin: 0; }

/* Competitor replace table */
.replace-table { max-width: 800px; margin: 0 auto; }
.replace-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.replace-row:last-child { border-bottom: none; }
.replace-row .tool-name { font-size: .95rem; color: var(--text-secondary); }
.replace-row .tool-price { font-size: .95rem; color: var(--text-muted); text-decoration: line-through; }
.replace-row .tf-price { font-size: .95rem; font-weight: 600; color: var(--success); }
.replace-total { display: flex; align-items: center; justify-content: space-between; padding: 20px; background: var(--gradient-card); border: 1px solid var(--border); border-radius: var(--radius-md); margin-top: 16px; }
.replace-total .tool-name { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.replace-total .tool-price { font-size: 1.1rem; font-weight: 700; color: var(--danger); text-decoration: line-through; }
.replace-total .tf-price { font-size: 1.1rem; font-weight: 700; color: var(--success); }

/* ─── CTA Section ─── */
.cta-section { text-align: center; padding: 100px 0; background: var(--gradient-hero); position: relative; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 60%); pointer-events: none; }
.cta-section h2 { position: relative; }
.cta-section p { position: relative; max-width: 500px; margin: 16px auto 0; }
.cta-section .hero-ctas { position: relative; }

/* ─── Footer ─── */
.footer { padding: 64px 0 32px; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand p { font-size: .875rem; color: var(--text-muted); max-width: 280px; }
.footer-col h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-muted); margin-bottom: 16px; }
.footer-col a { display: block; padding: 4px 0; font-size: .9rem; color: var(--text-secondary); transition: color var(--transition); }
.footer-col a:hover { color: var(--text); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 24px; border-top: 1px solid var(--border); font-size: .8rem; color: var(--text-muted); }

/* ─── Scroll Animations ─── */
.fade-up { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ─── Page Header (for sub-pages) ─── */
.page-hero { padding: 140px 0 60px; text-align: center; background: var(--gradient-hero); position: relative; }
.page-hero::before { content: ''; position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 600px; height: 400px; background: radial-gradient(ellipse, var(--primary-glow) 0%, transparent 70%); pointer-events: none; }
.page-hero .badge { display: inline-block; padding: 6px 16px; border-radius: 20px; font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; background: var(--gradient-card); border: 1px solid var(--border); color: var(--primary); }
.page-hero p { max-width: 600px; margin: 16px auto 0; font-size: 1.15rem; }

/* ─── Feature Detail Grid (sub-pages) ─── */
.feature-detail { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.feature-detail .card { padding: 28px; }
.feature-detail .card-icon { width: 40px; height: 40px; font-size: 1.1rem; margin-bottom: 16px; }

/* ─── Compare Table ─── */
.compare-table { overflow-x: auto; }
.compare-table table { width: 100%; border-collapse: collapse; }
.compare-table th, .compare-table td { padding: 12px 16px; text-align: center; font-size: .9rem; border-bottom: 1px solid var(--border); }
.compare-table th:first-child, .compare-table td:first-child { text-align: left; color: var(--text-secondary); }
.compare-table th { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); padding-bottom: 16px; }
.compare-table th.col-featured { color: var(--primary); }
.compare-table td { color: var(--text-secondary); }
.compare-table td.col-featured { color: var(--text); font-weight: 500; }
.compare-table .category-row td { font-size: .8rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--primary); padding-top: 28px; background: transparent; border-bottom: 1px solid rgba(59,130,246,.15); }

/* ─── FAQ Grid ─── */
.faq-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.faq-grid .card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.faq-grid .card p { font-size: .925rem; line-height: 1.6; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
  .grid-4, .grid-pricing { grid-template-columns: repeat(2, 1fr); }
  .feature-showcase { grid-template-columns: 1fr; gap: 32px; }
  .feature-showcase.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .grid-2, .grid-3, .grid-pricing { grid-template-columns: 1fr; }
  .nav-links, .nav-cta { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-card); border-bottom: 1px solid var(--border); padding: 16px; }
  .mobile-toggle { display: block; }
  .hero { padding: 120px 0 64px; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .stats-bar .grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .pricing-card { padding: 32px 24px; }
  .faq-grid { grid-template-columns: 1fr; }
  .compare-table th, .compare-table td { padding: 10px 10px; font-size: .8rem; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}