/* ─── Design tokens (mirrored from app) ─── */
:root {
  --color-bg:               #F7F8FA;
  --color-surface:          #FFFFFF;
  --color-surface-2:        #F0F2F5;
  --color-border:           #DDE1E7;
  --color-border-light:     #EAECF0;
  --color-text-primary:     #0D1117;
  --color-text-secondary:   #5A6474;
  --color-text-muted:       #9BA3AF;
  --color-accent:           #4F46E5;
  --color-accent-hover:     #4338CA;
  --color-accent-subtle:    #EEF2FF;
  --color-accent-border:    #C7D2FE;
  --color-danger:           #DC2626;
  --color-positive:         #15803D;
  --color-negative:         #B91C1C;
  --color-diff-output:      #FFF7ED;
  --color-diff-output-bd:   #FED7AA;
  --color-diff-assumption:  #F0FDF4;
  --color-diff-assumption-bd: #BBF7D0;

  --font-sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono:  "JetBrains Mono", "Fira Code", "Consolas", monospace;

  --radius-sm:  6px;
  --radius-md:  10px;
  --radius-lg:  16px;
  --radius-xl:  24px;

  --shadow-sm:  0 1px 3px rgba(13,17,23,0.08), 0 1px 2px rgba(13,17,23,0.04);
  --shadow-md:  0 4px 16px rgba(13,17,23,0.10), 0 2px 6px rgba(13,17,23,0.06);
  --shadow-lg:  0 12px 40px rgba(13,17,23,0.16), 0 4px 12px rgba(13,17,23,0.08);
  --shadow-xl:  0 24px 64px rgba(13,17,23,0.20);

  --nav-height: 60px;
}

/* ─── Reset ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ─── Utilities ─── */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 720px; margin: 0 auto; padding: 0 24px; }
.container-wide { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-accent); background: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-border);
  padding: 4px 10px; border-radius: 20px; margin-bottom: 20px;
}
.section-title {
  font-size: clamp(28px, 4vw, 42px); font-weight: 700;
  letter-spacing: -0.02em; line-height: 1.15;
  color: var(--color-text-primary);
}
.section-sub {
  font-size: 18px; color: var(--color-text-secondary);
  line-height: 1.65; margin-top: 16px; max-width: 560px;
}
.text-center { text-align: center; }
.text-center .section-sub { margin: 16px auto 0; }
.mono { font-family: var(--font-mono); }
.tag {
  display: inline-flex; align-items: center;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  color: var(--color-text-secondary); background: var(--color-surface-2);
  border: 1px solid var(--color-border); padding: 2px 8px; border-radius: 4px;
}

/* ─── Buttons ─── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans); font-size: 14px; font-weight: 600;
  padding: 10px 20px; border-radius: var(--radius-sm);
  border: 1.5px solid transparent; cursor: pointer;
  transition: all 0.15s ease; white-space: nowrap; text-decoration: none;
}
.btn-primary {
  background: var(--color-accent); color: #fff;
  border-color: var(--color-accent);
  box-shadow: 0 1px 3px rgba(79,70,229,0.35);
}
.btn-primary:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,70,229,0.40);
}
.btn-secondary {
  background: var(--color-surface); color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:hover {
  background: var(--color-surface-2); border-color: #c0c8d4;
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent; color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover { color: var(--color-text-primary); background: var(--color-surface-2); }
.btn-lg { font-size: 15px; padding: 13px 28px; }
.btn-xl { font-size: 16px; padding: 15px 36px; border-radius: var(--radius-md); }

/* ─── Nav ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-height);
  background: rgba(247,248,250,0.85);
  backdrop-filter: blur(12px) saturate(1.4);
  -webkit-backdrop-filter: blur(12px) saturate(1.4);
  border-bottom: 1px solid var(--color-border-light);
  transition: box-shadow 0.2s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 100%; gap: 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 17px; letter-spacing: -0.01em;
  color: var(--color-text-primary);
}
.nav-logo-img {
  width: 30px; height: 30px;
  border-radius: 8px;
  flex-shrink: 0;
}
.nav-links {
  display: flex; align-items: center; gap: 4px;
  flex: 1; justify-content: center;
}
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--color-text-secondary);
  padding: 6px 12px; border-radius: var(--radius-sm);
  transition: color 0.12s, background 0.12s;
}
.nav-links a:hover { color: var(--color-text-primary); background: var(--color-surface-2); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-hamburger { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-hamburger span {
  display: block; width: 20px; height: 1.5px;
  background: var(--color-text-primary); margin: 4px 0;
  transition: all 0.2s;
}

/* ─── Hero ─── */
.hero {
  padding: calc(var(--nav-height) + 72px) 0 80px;
  background: var(--color-bg);
  overflow: hidden; position: relative;
}
.hero::before {
  content: '';
  position: absolute; top: -200px; left: 50%; transform: translateX(-50%);
  width: 900px; height: 600px;
  background: radial-gradient(ellipse at center, rgba(79,70,229,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 56px; align-items: center;
}
.hero-left { max-width: 560px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 500; color: var(--color-accent);
  background: var(--color-accent-subtle); border: 1px solid var(--color-accent-border);
  padding: 5px 12px; border-radius: 20px; margin-bottom: 28px;
}
.hero-badge-dot {
  width: 6px; height: 6px; background: var(--color-accent);
  border-radius: 50%; animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-size: clamp(36px, 5vw, 58px); font-weight: 800;
  letter-spacing: -0.03em; line-height: 1.08;
  color: var(--color-text-primary); margin-bottom: 20px;
}
.hero-title em {
  font-style: normal; color: var(--color-accent);
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px; color: var(--color-text-secondary);
  line-height: 1.65; margin-bottom: 36px; max-width: 480px;
}
.hero-cta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-store-note {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--color-text-muted);
  margin-bottom: 24px;
}
.hero-social {
  display: flex; align-items: center; gap: 16px;
  font-size: 13px; color: var(--color-text-muted);
}
.hero-social-avatars {
  display: flex;
}
.hero-social-avatars span {
  width: 28px; height: 28px; border-radius: 50%;
  border: 2px solid var(--color-surface);
  margin-left: -8px; font-size: 11px; font-weight: 600;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
}
.hero-social-avatars span:first-child { margin-left: 0; }
.hero-right { position: relative; }
.hero-screenshot {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 64px rgba(0,0,0,0.14), 0 4px 16px rgba(0,0,0,0.08);
  display: block;
  transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.hero-screenshot:hover {
  transform: perspective(1000px) rotateY(-1deg) rotateX(0.5deg);
  box-shadow: 0 32px 80px rgba(0,0,0,0.18), 0 8px 24px rgba(0,0,0,0.1);
}
.hero-app-frame {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: perspective(1000px) rotateY(-4deg) rotateX(2deg);
  transition: transform 0.4s ease;
}
.hero-app-frame:hover {
  transform: perspective(1000px) rotateY(-1deg) rotateX(0.5deg);
}

/* App mockup internals */
.app-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border-light);
}
.app-titlebar-dots { display: flex; gap: 6px; }
.app-titlebar-dots span {
  width: 10px; height: 10px; border-radius: 50%;
}
.app-titlebar-dots span:nth-child(1) { background: #FF5F57; }
.app-titlebar-dots span:nth-child(2) { background: #FFBD2E; }
.app-titlebar-dots span:nth-child(3) { background: #28C840; }
.app-titlebar-name {
  flex: 1; text-align: center;
  font-size: 11px; font-weight: 500; color: var(--color-text-muted);
  font-family: var(--font-mono);
}
.app-body { display: flex; height: 340px; }
.app-sidebar {
  width: 160px; flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-light);
  padding: 10px 8px;
  display: flex; flex-direction: column; gap: 2px;
}
.app-sidebar-header {
  font-size: 9px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-text-muted);
  padding: 4px 6px; margin-bottom: 2px;
}
.branch-item {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 7px; border-radius: 5px;
  font-size: 11px; font-weight: 500;
  color: var(--color-text-secondary); cursor: pointer;
  transition: all 0.1s;
}
.branch-item.active {
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-border);
  color: var(--color-accent);
}
.branch-item.child { padding-left: 18px; }
.branch-item.grandchild { padding-left: 28px; }
.branch-dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
}
.app-grid { flex: 1; overflow: hidden; }
.app-formula-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 4px 10px; border-bottom: 1px solid var(--color-border-light);
  background: var(--color-bg);
}
.app-cell-ref {
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  color: var(--color-text-muted); width: 32px;
}
.app-formula-bar-sep {
  width: 1px; height: 14px; background: var(--color-border);
}
.app-formula-input {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--color-text-primary);
}
.app-formula-input .fx { color: var(--color-accent); margin-right: 4px; }
.grid-wrap { overflow: auto; height: calc(340px - 26px); }
.grid-table {
  border-collapse: collapse; font-family: var(--font-mono); font-size: 10px;
  width: 100%;
}
.grid-table th {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  border-right: 1px solid var(--color-border-light);
  padding: 3px 8px; text-align: center;
  font-size: 9px; font-weight: 500; color: var(--color-text-muted);
  white-space: nowrap; position: sticky; top: 0;
}
.grid-table td {
  border-bottom: 1px solid rgba(221,225,231,0.5);
  border-right: 1px solid rgba(221,225,231,0.3);
  padding: 3px 8px; white-space: nowrap;
  color: var(--color-text-primary);
}
.grid-table tr:nth-child(even) td { background: rgba(247,248,250,0.6); }
.grid-table tr:hover td { background: var(--color-accent-subtle); }
.grid-table td.row-header {
  background: var(--color-bg) !important;
  color: var(--color-text-muted); text-align: center;
  font-size: 9px; border-right: 1px solid var(--color-border-light);
  position: sticky; left: 0;
}
.grid-table td.label-cell {
  color: var(--color-text-secondary); font-family: var(--font-sans);
  font-size: 10px; font-weight: 500; min-width: 120px;
}
.cell-assumption {
  background: var(--color-diff-assumption) !important;
  color: var(--color-positive) !important;
}
.cell-output {
  background: var(--color-diff-output) !important;
  color: #92400E !important;
}
.cell-active {
  background: var(--color-accent-subtle) !important;
  outline: 2px solid var(--color-accent) !important;
  outline-offset: -1px;
}
.cell-inherited { color: var(--color-text-inherited) !important; }
.delta-up { color: var(--color-positive); font-size: 9px; }
.delta-down { color: var(--color-negative); font-size: 9px; }

/* ─── Logo bar ─── */
.logo-bar {
  padding: 20px 0 48px;
  border-top: 1px solid var(--color-border-light);
}
.logo-bar-label {
  font-size: 12px; font-weight: 500; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--color-text-muted);
  text-align: center; margin-bottom: 24px;
}
.logo-bar-logos {
  display: flex; align-items: center; justify-content: center;
  gap: 40px; flex-wrap: wrap;
}
.logo-bar-logos .logo-item {
  font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  color: var(--color-text-muted); letter-spacing: 0.04em;
  opacity: 0.6; transition: opacity 0.2s;
}
.logo-bar-logos .logo-item:hover { opacity: 1; }

/* ─── Problem section ─── */
.problem-section { background: var(--color-surface); }
.problem-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 56px; align-items: center;
}
.problem-list { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.problem-item {
  display: flex; gap: 14px;
  padding: 16px 18px; background: var(--color-bg);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  transition: border-color 0.2s;
}
.problem-item:hover { border-color: var(--color-accent-border); }
.problem-icon {
  width: 36px; height: 36px; flex-shrink: 0;
  background: #FEF2F2; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
}
.problem-item-text h4 {
  font-size: 14px; font-weight: 600; margin-bottom: 4px;
}
.problem-item-text p {
  font-size: 13px; color: var(--color-text-secondary); line-height: 1.5;
}
.solution-card {
  background: linear-gradient(135deg, var(--color-accent-subtle), #fff);
  border: 1.5px solid var(--color-accent-border);
  border-radius: var(--radius-lg); padding: 32px;
  box-shadow: var(--shadow-md);
}
.solution-card h3 {
  font-size: 22px; font-weight: 700; margin-bottom: 12px;
}
.solution-card p {
  font-size: 15px; color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 24px;
}
.solution-features { display: flex; flex-direction: column; gap: 10px; }
.solution-feature {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 500;
}
.check-icon {
  width: 20px; height: 20px; flex-shrink: 0;
  background: var(--color-accent); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 11px;
}

/* ─── How it works ─── */
.how-section { background: var(--color-bg); }
.steps { display: flex; flex-direction: column; gap: 80px; margin-top: 64px; }
.step {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 64px; align-items: center;
}
.step:nth-child(even) { direction: rtl; }
.step:nth-child(even) > * { direction: ltr; }
.step-num {
  font-family: var(--font-mono); font-size: 11px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--color-accent); margin-bottom: 14px;
  display: flex; align-items: center; gap: 8px;
}
.step-num::before {
  content: attr(data-n);
  width: 22px; height: 22px; background: var(--color-accent);
  color: #fff; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.step-title { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 14px; }
.step-desc { font-size: 16px; color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 24px; }
.step-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.step-visual {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
  overflow: hidden; min-height: 260px;
  display: flex; align-items: center; justify-content: center;
}
.step-screenshot {
  width: 100%; padding: 16px;
}

/* ─── Features ─── */
.features-section { background: var(--color-surface); }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1px; background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  margin-top: 56px;
}
.feature-card {
  background: var(--color-surface); padding: 28px;
  transition: background 0.15s;
}
.feature-card:hover { background: var(--color-accent-subtle); }
.feature-icon {
  width: 40px; height: 40px;
  background: var(--color-accent-subtle);
  border: 1px solid var(--color-accent-border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; margin-bottom: 16px;
}
.feature-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.55; }

/* ─── Use cases ─── */
.usecases-section { background: var(--color-bg); }
.usecases-tabs {
  display: flex; gap: 4px; margin: 40px 0 32px;
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto; padding-bottom: 0;
}
.usecase-tab {
  padding: 10px 18px;
  font-size: 14px; font-weight: 500;
  color: var(--color-text-secondary);
  border-bottom: 2px solid transparent;
  cursor: pointer; transition: all 0.15s;
  white-space: nowrap; background: none; border-top: none; border-left: none; border-right: none;
  margin-bottom: -1px;
}
.usecase-tab.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.usecase-tab:hover { color: var(--color-text-primary); }
.usecase-content { display: none; }
.usecase-content.active { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.usecase-text h3 { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.usecase-text p { font-size: 16px; color: var(--color-text-secondary); line-height: 1.65; margin-bottom: 24px; }
.usecase-list { display: flex; flex-direction: column; gap: 10px; }
.usecase-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--color-text-secondary); line-height: 1.5;
}
.usecase-list li::before {
  content: '→'; color: var(--color-accent);
  font-weight: 700; flex-shrink: 0; margin-top: 1px;
}
.usecase-visual {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  overflow: hidden;
}

/* ─── Screenshots ─── */
.screenshots-section { background: var(--color-surface); overflow: hidden; }
.screenshots-track-wrap { position: relative; margin-top: 48px; }
.screenshots-track-wrap::before,
.screenshots-track-wrap::after {
  content: ''; position: absolute; top: 0; bottom: 0; width: 80px; z-index: 2; pointer-events: none;
}
.screenshots-track-wrap::before { left: 0; background: linear-gradient(90deg, var(--color-surface), transparent); }
.screenshots-track-wrap::after { right: 0; background: linear-gradient(-90deg, var(--color-surface), transparent); }
.screenshots-track {
  display: flex; gap: 20px; overflow-x: auto; padding: 8px 40px 24px;
  scroll-snap-type: x mandatory; scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.screenshots-track::-webkit-scrollbar { display: none; }
.screenshot-card {
  flex-shrink: 0; width: 480px;
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-md); scroll-snap-align: start;
  transition: transform 0.2s, box-shadow 0.2s;
}
.screenshot-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.screenshot-preview {
  height: 260px; background: var(--color-bg);
  display: flex; align-items: center; justify-content: center;
  padding: 12px; overflow: hidden;
}
.screenshot-label {
  padding: 14px 18px; border-top: 1px solid var(--color-border-light);
  background: var(--color-surface);
}
.screenshot-label h4 { font-size: 13px; font-weight: 600; margin-bottom: 3px; }
.screenshot-label p { font-size: 12px; color: var(--color-text-muted); }

/* ─── Lightbox ─── */
#lightbox { display: none; position: fixed; inset: 0; z-index: 9999; align-items: center; justify-content: center; }
#lightbox.lb-open { display: flex; }
.lb-backdrop { position: absolute; inset: 0; background: rgba(0,0,0,0.88); }
.lb-img { position: relative; max-width: 90vw; max-height: 88vh; border-radius: 8px; box-shadow: 0 24px 80px rgba(0,0,0,0.6); object-fit: contain; }
.lb-close { position: absolute; top: 20px; right: 24px; background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2); color: #fff; font-size: 18px; width: 36px; height: 36px; border-radius: 50%; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background 0.15s; }
.lb-close:hover { background: rgba(255,255,255,0.2); }
.screenshots-nav {
  display: flex; justify-content: center; gap: 8px; margin-top: 24px;
}
.screenshots-nav button {
  width: 36px; height: 36px; border-radius: 50%;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-secondary); transition: all 0.15s;
}
.screenshots-nav button:hover {
  border-color: var(--color-accent); color: var(--color-accent);
}

/* ─── Video ─── */
.video-section { background: var(--color-bg); }
.video-wrap {
  margin-top: 48px; position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden; box-shadow: var(--shadow-xl);
  background: #0D1117; aspect-ratio: 16/9;
  cursor: pointer;
}
.video-thumbnail {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s, opacity 0.3s;
}
.video-wrap:hover .video-thumbnail { transform: scale(1.02); opacity: 0.85; }
.video-play-btn {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 72px; height: 72px; border-radius: 50%;
  background: rgba(255,255,255,0.95); border: none; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}
.video-wrap:hover .video-play-btn { transform: translate(-50%, -50%) scale(1.08); }
.video-play-btn svg { width: 26px; height: 26px; fill: var(--color-accent); margin-left: 3px; }
.video-overlay-text {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  font-size: 13px; font-weight: 500; color: rgba(255,255,255,0.75);
  white-space: nowrap;
}
.video-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; margin-top: 32px;
}
.video-mini {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); overflow: hidden; cursor: pointer;
  transition: box-shadow 0.2s, transform 0.2s;
}
.video-mini:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.video-mini-thumb {
  height: 120px; background: var(--color-bg);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden;
}
.video-mini-play {
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(79,70,229,0.9); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; margin-left: 3px;
}
.video-mini-info { padding: 12px 14px; }
.video-mini-info h4 { font-size: 13px; font-weight: 600; margin-bottom: 3px; }
.video-mini-info p { font-size: 11px; color: var(--color-text-muted); }

/* ─── Testimonials ─── */
.testimonials-section { background: var(--color-surface); }
.testimonials-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px; margin-top: 48px;
}
.testimonial-card {
  background: var(--color-bg); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 24px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.testimonial-card:hover { border-color: var(--color-accent-border); box-shadow: var(--shadow-sm); }
.testimonial-stars { color: #F59E0B; font-size: 13px; margin-bottom: 14px; letter-spacing: 2px; }
.testimonial-quote {
  font-size: 14px; line-height: 1.65; color: var(--color-text-primary);
  margin-bottom: 20px; font-style: italic;
}
.testimonial-quote::before { content: '\201C'; color: var(--color-accent); font-size: 18px; }
.testimonial-author { display: flex; align-items: center; gap: 10px; }
.testimonial-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700; color: #fff; flex-shrink: 0;
}
.testimonial-name { font-size: 13px; font-weight: 600; }
.testimonial-role { font-size: 12px; color: var(--color-text-muted); }

/* ─── Diff visual ─── */
.diff-mini {
  font-family: var(--font-mono); font-size: 10px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); overflow: hidden;
}
.diff-mini-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 6px 10px; background: var(--color-bg);
  border-bottom: 1px solid var(--color-border-light);
  font-size: 9px; color: var(--color-text-muted);
}
.diff-row {
  display: flex; align-items: center;
  padding: 3px 10px; gap: 8px;
  border-bottom: 1px solid rgba(221,225,231,0.4);
}
.diff-row .label { flex: 1; color: var(--color-text-secondary); font-size: 10px; font-family: var(--font-sans); }
.diff-row .base { color: var(--color-text-muted); width: 60px; text-align: right; }
.diff-row .branch { font-weight: 600; width: 60px; text-align: right; }
.diff-row .branch.up { color: var(--color-positive); }
.diff-row .branch.down { color: var(--color-negative); }
.diff-row .delta { width: 48px; text-align: right; font-size: 9px; }
.diff-row .delta.up { color: var(--color-positive); }
.diff-row .delta.down { color: var(--color-negative); }

/* ─── Pricing / CTA ─── */
.pricing-section { background: var(--color-bg); }
.pricing-card {
  max-width: 500px; margin: 0 auto;
  background: var(--color-surface); border: 1.5px solid var(--color-accent-border);
  border-radius: var(--radius-xl); padding: 48px; text-align: center;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(160deg, var(--color-accent-subtle) 0%, var(--color-surface) 60%);
}
.pricing-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: 11px; font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; color: var(--color-positive);
  background: var(--color-diff-assumption); border: 1px solid var(--color-diff-assumption-bd);
  padding: 4px 10px; border-radius: 20px; margin-bottom: 20px;
}
.pricing-card h2 { font-size: 40px; font-weight: 800; letter-spacing: -0.03em; margin-bottom: 8px; }
.pricing-card .price-free {
  font-family: var(--font-mono); font-size: 56px; font-weight: 800;
  color: var(--color-accent); letter-spacing: -0.04em; line-height: 1;
}
.pricing-card .price-note { font-size: 15px; color: var(--color-text-muted); margin: 8px 0 28px; }
.pricing-includes { text-align: left; margin: 28px 0; display: flex; flex-direction: column; gap: 10px; }
.pricing-includes li { display: flex; align-items: center; gap: 10px; font-size: 14px; }

/* ─── Email capture ─── */
.email-capture-section {
  background: var(--color-accent);
  background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
  padding: 96px 0;
}
.email-capture-section .section-title,
.email-capture-section .section-sub { color: rgba(255,255,255,0.95); }
.email-capture-section .section-sub { color: rgba(255,255,255,0.75); }
.email-form { display: flex; gap: 10px; margin-top: 32px; max-width: 460px; margin-left: auto; margin-right: auto; }
.email-input {
  flex: 1; padding: 12px 16px;
  font-family: var(--font-sans); font-size: 14px;
  border: 1.5px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.12);
  color: #fff; border-radius: var(--radius-md);
  outline: none; transition: border-color 0.15s, background 0.15s;
}
.email-input::placeholder { color: rgba(255,255,255,0.5); }
.email-input:focus { border-color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.18); }
.email-form .btn-submit {
  background: #fff; color: var(--color-accent);
  border: none; font-weight: 700; padding: 12px 24px;
  border-radius: var(--radius-md); cursor: pointer;
  font-size: 14px; white-space: nowrap;
  transition: all 0.15s;
}
.email-form .btn-submit:hover { background: rgba(255,255,255,0.9); transform: translateY(-1px); }
.email-privacy { font-size: 12px; color: rgba(255,255,255,0.5); margin-top: 12px; text-align: center; }
.email-success { display: none; }
.email-success.show {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 500; color: rgba(255,255,255,0.95);
  margin-top: 16px;
}

/* ─── Footer ─── */
.footer {
  background: var(--color-text-primary);
  color: rgba(255,255,255,0.6);
  padding: 56px 0 32px;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px;
}
.footer-brand .nav-logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 13px; line-height: 1.65; max-width: 260px; }
.footer-col h4 {
  font-size: 12px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.06em; color: rgba(255,255,255,0.9); margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul a { font-size: 13px; transition: color 0.12s; }
.footer-col ul a:hover { color: rgba(255,255,255,0.9); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px; display: flex; align-items: center; justify-content: space-between;
  font-size: 12px;
}
.footer-bottom a:hover { color: rgba(255,255,255,0.9); }

/* ─── Scroll animations ─── */
.fade-up {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }

/* ─── Mini charts ─── */
.mini-chart-bars {
  display: flex; align-items: flex-end; gap: 3px; height: 60px;
}
.mini-chart-bars .bar {
  flex: 1; border-radius: 2px 2px 0 0;
  background: linear-gradient(180deg, #6366F1, #4F46E5);
  transition: height 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.mini-chart-bars .bar.orange { background: linear-gradient(180deg, #F59E0B, #D97706); }
.mini-chart-bars .bar.green  { background: linear-gradient(180deg, #34D399, #059669); }

/* ─── Stats strip ─── */
.stats-strip { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.stats-inner { display: flex; justify-content: center; gap: 0; }
.stat-item {
  flex: 1; max-width: 220px; text-align: center;
  padding: 32px 24px; border-right: 1px solid var(--color-border);
}
.stat-item:last-child { border-right: none; }
.stat-value {
  font-size: 36px; font-weight: 800; letter-spacing: -0.03em;
  color: var(--color-accent); font-family: var(--font-mono);
  line-height: 1;
}
.stat-label { font-size: 13px; color: var(--color-text-muted); margin-top: 6px; }

/* ─── Announcement banner ─── */
.announce-banner {
  background: var(--color-accent); color: #fff;
  text-align: center; padding: 10px 16px;
  font-size: 13px; font-weight: 500;
}
.announce-banner a { color: rgba(255,255,255,0.85); text-decoration: underline; margin-left: 8px; }
.announce-banner a:hover { color: #fff; }

/* ─── Responsive ─── */
@media (max-width: 960px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .problem-grid { grid-template-columns: 1fr; }
  .step { grid-template-columns: 1fr; }
  .step:nth-child(even) { direction: ltr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .usecase-content.active { grid-template-columns: 1fr; }
  .stats-inner { flex-wrap: wrap; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .nav-hamburger { display: block; }
  .features-grid { grid-template-columns: 1fr; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; align-items: flex-start; }
  .email-form { flex-direction: column; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .stats-inner { flex-direction: column; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--color-border); }
}