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

:root {
  --primary: #4f46e5;
  --primary-container: #e0e7ff;
  --secondary: #0891b2;
  --secondary-container: #cffafe;
  --tertiary: #8b5cf6;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-variant: #eef2ff;
  --outline: #cbd5e1;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --success: #16a34a;
  --warning: #d97706;
  --nav-bg: #1f1b4d;
  --nav-bg-2: #2c2470;
  --nav-text: #e6e8ff;
  --shadow-1: 0 1px 2px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.08);
  --shadow-2: 0 8px 22px rgba(15, 23, 42, 0.12);
  --ease: cubic-bezier(0.2, 0, 0, 1);
}

* { box-sizing: border-box; }
html, body { min-height: 100%; }

body {
  margin: 0;
  font-family: "Roboto", "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: radial-gradient(circle at 88% -8%, rgba(79, 70, 229, 0.08), transparent 28%), var(--bg);
}

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

.top,
.lab-top {
  position: sticky;
  top: 0;
  z-index: 30;
  background: linear-gradient(135deg, var(--nav-bg), var(--nav-bg-2));
  border-bottom: 1px solid rgba(224, 231, 255, 0.24);
  box-shadow: 0 8px 18px rgba(18, 14, 44, 0.26);
}

.top .inner,
.lab-top .inner,
.inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: #ffffff;
}

.brand img {
  width: auto;
  height: 28px;
  max-width: min(184px, 46vw);
  object-fit: contain;
  filter: drop-shadow(0 1px 4px rgba(0, 0, 0, 0.25));
}

.global-nav { display: flex; flex-wrap: wrap; gap: 8px; }

.global-nav a {
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--nav-text);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.28s var(--ease);
}

.global-nav a:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #ffffff;
}

.global-nav a.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.45);
}

.global-nav a:active,
.section-tabs a:active,
.scenario-card a:active { transform: scale(0.95); }

.global-nav a:focus-visible,
.section-tabs a:focus-visible,
.scenario-card a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.section-tabs-wrap {
  max-width: 1200px;
  margin: 14px auto 0;
  padding: 0 16px;
}

.section-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 8px;
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid var(--outline);
  box-shadow: var(--shadow-1);
}

.section-tabs a {
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.28s var(--ease);
}

.section-tabs a:hover {
  background: var(--primary-container);
  color: var(--text-primary);
}

.section-tabs a.active {
  background: var(--primary);
  color: #ffffff;
}

.wrap {
  max-width: 1200px;
  margin: 22px auto 24px;
  padding: 0 16px;
}

.hero,
.page-head,
.panel,
.scenario-card a,
.catalog-group,
.tight-card {
  background: var(--surface);
  border: 1px solid var(--outline);
  border-radius: 22px;
}

.hero,
.page-head {
  padding: 24px 26px;
  box-shadow: var(--shadow-2);
}

.hero h1,
.page-head h1 {
  margin: 0;
  font-size: clamp(1.95rem, 3.1vw, 2.7rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--primary);
}

.hero p,
.page-head p {
  margin: 10px 0 0;
  max-width: 780px;
  color: var(--text-secondary);
  font-size: 1.04rem;
  line-height: 1.58;
}

.panel {
  margin-top: 16px;
  padding: 20px;
  box-shadow: var(--shadow-1);
}

.panel h2 {
  margin: 0;
  font-size: 1.34rem;
  line-height: 1.25;
  color: var(--primary);
}

.catalog-grid {
  margin-top: 14px;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.catalog-group {
  padding: 18px;
  transition: transform 0.28s var(--ease), box-shadow 0.28s var(--ease);
}

.catalog-group:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-2);
}

.catalog-group h3 {
  margin: 0;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary);
}

.scenario-list { display: grid; gap: 8px; margin-top: 10px; }

.scenario-card a {
  display: block;
  padding: 13px 16px;
  color: var(--text-primary);
  font-weight: 500;
  transition: all 0.28s var(--ease);
}

.scenario-card a:hover {
  background: var(--primary-container);
  border-color: color-mix(in srgb, var(--primary) 22%, var(--outline));
}

.placements {
  margin-top: 14px;
  display: grid;
  gap: 14px;
}

.placement-zone {
  border: 1px solid var(--outline);
  background: var(--surface-variant);
  border-radius: 20px;
  padding: 14px;
  box-shadow: var(--shadow-1);
}

.zone-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.zone-head h3 {
  margin: 0;
  font-size: 1.28rem;
  line-height: 1.25;
  color: var(--text-primary);
}

.tag-id {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.placement-body {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 10px;
  align-items: start;
}

.creative-slot {
  min-height: 94px;
  border-radius: 14px;
  border: 1px solid var(--outline);
  border-top: 4px solid var(--outline);
  background: var(--surface);
  display: grid;
  place-items: center;
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}

.placement-top .creative-slot { border-top-color: color-mix(in srgb, var(--primary) 35%, #ffffff); }
.placement-mid .creative-slot { border-top-color: color-mix(in srgb, var(--secondary) 45%, #ffffff); }
.placement-bottom .creative-slot { border-top-color: color-mix(in srgb, var(--tertiary) 42%, #ffffff); }

.creative-slot.slot-300x250 { width: 300px; max-width: 100%; min-height: 250px; }
.creative-slot.slot-728x90 { width: 728px; max-width: 100%; min-height: 90px; }
.creative-slot.slot-fluid { width: 100%; min-height: 150px; }

.pixel-script {
  margin: 0;
  padding: 10px 12px;
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-primary);
  border-radius: 14px;
  border: 1px solid var(--outline);
  background: var(--surface);
  overflow-x: auto;
  box-shadow: inset 0 0 0 1px rgba(8, 145, 178, 0.06);
}

.pixel-script:hover {
  border-color: color-mix(in srgb, var(--secondary) 35%, var(--outline));
}

.long-scroll { min-height: 320vh; }
.long-copy { margin: 0; color: var(--text-secondary); line-height: 1.6; }
.scroll-segment { min-height: 72vh; display: grid; align-content: center; gap: 10px; }

.viewability-stack {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 232px;
  z-index: 30;
  display: grid;
  gap: 8px;
}

.viewability-chip {
  border-radius: 14px;
  border: 1px solid var(--outline);
  background: var(--surface);
  font-size: 12px;
  padding: 8px 10px;
  box-shadow: var(--shadow-2);
}

.viewability-chip strong { display: block; margin-bottom: 3px; }
.viewability-chip.is-pending { background: color-mix(in srgb, var(--warning) 16%, #ffffff); }
.viewability-chip.is-in { background: color-mix(in srgb, var(--secondary) 13%, #ffffff); }
.viewability-chip.is-viewable { background: color-mix(in srgb, var(--success) 15%, #ffffff); }
.viewability-chip.is-out { background: color-mix(in srgb, #ef4444 13%, #ffffff); }

.host-compare,
.experiment-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.host-panel,
.iframe-panel,
.creative-mock {
  border: 1px solid var(--outline);
  border-radius: 18px;
  padding: 12px;
  background: var(--surface);
}

.host-panel { background: color-mix(in srgb, var(--primary-container) 35%, var(--surface)); }
.iframe-panel { background: color-mix(in srgb, var(--secondary-container) 38%, var(--surface)); }

.host-panel h3,
.iframe-panel h3 { margin: 0 0 10px; color: var(--text-primary); }

.preview {
  width: 100%;
  min-height: 360px;
  border: 1px solid var(--outline);
  border-radius: 14px;
  background: var(--surface);
}

.creative-mock {
  min-height: 280px;
  background: linear-gradient(140deg, #ffffff 20%, #f1f5ff 100%);
}

.footer {
  max-width: 1200px;
  margin: 0 auto 24px;
  padding: 0 16px;
  color: var(--text-secondary);
  font-size: 12px;
  display: flex;
  gap: 8px;
  justify-content: space-between;
  flex-wrap: wrap;
}

.tight-iframe {
  margin: 0;
  padding: 12px;
  background: var(--bg);
  font-family: "Roboto", "Segoe UI", sans-serif;
  color: var(--text-primary);
}

.tight-card {
  padding: 10px;
  border-radius: 18px;
  box-shadow: var(--shadow-1);
}

.tight-card h1 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.3;
  color: var(--primary);
}

.tight-card p {
  margin: 8px 0 0;
  font-size: 0.93rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.tight-meta {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-secondary);
}

.tight-card--image { padding: 8px; }

.ad-creative-image,
.creative-image {
  display: block;
  width: 100%;
  aspect-ratio: 6 / 5;
  object-fit: cover;
  border-radius: 14px;
  border: 1px solid var(--outline);
  background: var(--surface);
  box-shadow: var(--shadow-1);
  filter: saturate(1.06) contrast(1.04);
}

@media (max-width: 1080px) {
  .catalog-grid,
  .host-compare,
  .experiment-grid {
    grid-template-columns: 1fr;
  }

  .placement-body {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .global-nav,
  .section-tabs { width: 100%; }

  .hero,
  .page-head,
  .panel,
  .placement-zone,
  .host-panel,
  .iframe-panel,
  .creative-mock,
  .tight-card { border-radius: 16px; }

  .viewability-stack {
    width: 190px;
    right: 10px;
    bottom: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
    scroll-behavior: auto !important;
  }

  .global-nav a:active,
  .section-tabs a:active,
  .scenario-card a:active { transform: none; }
}