:root {
  --bg: #08070d;
  --card: rgba(255, 255, 255, 0.06);
  --card-strong: rgba(255, 255, 255, 0.11);
  --text: #f7f2ff;
  --muted: #b9adc9;
  --purple: #8b5cf6;
  --orange: #ff8a3d;
  --green: #34a853;
  --blue: #4285f4;
  --red: #ea4335;
  --yellow: #fbbc05;
  --line: rgba(255, 255, 255, 0.14);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 12%, rgba(139, 92, 246, 0.18), transparent 32%),
    radial-gradient(circle at 85% 10%, rgba(255, 138, 61, 0.12), transparent 28%),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
}

.topbar {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1120px, 92%);
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 12px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(8, 7, 13, 0.82);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--purple), var(--orange));
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: white;
}

.nav {
  display: flex;
  gap: 18px;
  font-size: 13px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a:hover {
  color: white;
}

.hero {
  max-width: 1120px;
  margin: 0 auto;
  padding: 158px 20px 80px;
  display: grid;
  grid-template-columns: minmax(0, 1.22fr) minmax(280px, 0.78fr);
  gap: 40px;
  align-items: center;
}

.eyebrow,
.section-label,
.tag {
  color: var(--orange);
  font-weight: 900;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1.4px;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(56px, 9vw, 104px);
  margin: 8px 0 12px;
  line-height: 0.9;
}

h2 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
  margin: 0 0 18px;
}

h3 {
  margin: 0 0 12px;
  font-size: 20px;
  line-height: 1.2;
}

.hero-text {
  max-width: 680px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0;
}

.primary-btn,
.secondary-btn {
  min-height: 44px;
  border-radius: 14px;
  padding: 12px 18px;
  font-weight: 800;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

.primary-btn {
  background: linear-gradient(135deg, var(--purple), var(--orange));
  color: white;
}

.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 650px;
}

.hero-metrics div {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.04);
}

.hero-metrics strong {
  display: block;
  font-size: 22px;
}

.hero-metrics span {
  color: var(--muted);
  font-size: 13px;
}

.hero-card,
.glass-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 36px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-card p,
.glass-card p,
.intro-band p,
.assistant-zone p {
  color: var(--muted);
}

.profile-wrapper {
  width: 178px;
  height: 178px;
  border-radius: 50%;
  overflow: hidden;
  margin-bottom: 24px;
  border: 3px solid var(--purple);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.4), rgba(255, 138, 61, 0.4));
  display: grid;
  place-items: center;
}

.profile-fallback::before {
  content: "GC";
  font-weight: 900;
  font-size: 42px;
}

.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.google-wordmark {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 14px;
  font-family: Arial, sans-serif;
}

.g-blue { color: var(--blue); }
.g-red { color: var(--red); }
.g-yellow { color: var(--yellow); }
.g-green { color: var(--green); }

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 64px 20px;
}

.intro-band,
.assistant-zone {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.55fr);
  gap: 28px;
  align-items: center;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.about-grid,
.stories-grid,
.interview-bank-grid,
.pillars-grid,
.dictionary-grid {
  display: grid;
  gap: 18px;
  margin-top: 24px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.glass-card {
  padding: 26px;
  transition: transform 0.2s ease, background 0.2s ease;
}

.glass-card:hover {
  transform: translateY(-3px);
  background: var(--card-strong);
}

details.glass-card {
  padding: 0;
}

summary {
  list-style: none;
  padding: 26px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

summary h3 {
  margin: 0;
}

summary::-webkit-details-marker {
  display: none;
}

.summary-hint {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
}

details[open] .summary-hint {
  color: var(--orange);
}

.details-content {
  padding: 0 26px 26px;
}

.details-content p + p {
  margin-top: 14px;
}

.tag {
  display: inline-block;
  margin-bottom: 12px;
  font-size: 10px;
}

ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

li + li {
  margin-top: 8px;
}

.ai-trigger {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 62px;
  height: 62px;
  background: linear-gradient(135deg, var(--purple), var(--orange));
  border-radius: 50%;
  border: none;
  cursor: pointer;
  z-index: 1100;
  color: white;
  font-weight: 900;
  box-shadow: var(--shadow);
}

.assistant {
  position: fixed;
  bottom: 100px;
  right: 28px;
  width: min(380px, calc(100vw - 32px));
  height: min(590px, calc(100vh - 130px));
  background: rgba(15, 14, 22, 0.96);
  border: 1px solid var(--line);
  border-radius: 28px;
  display: flex;
  flex-direction: column;
  z-index: 1050;
  backdrop-filter: blur(25px);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.assistant.hidden {
  display: none;
}

.assistant-header {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 12px;
}

.assistant-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--orange), var(--purple));
  display: grid;
  place-items: center;
  font-weight: 900;
}

.header-info h3,
.header-info p {
  margin: 0;
}

.header-info p {
  color: var(--muted);
  font-size: 12px;
}

.close-btn {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 28px;
  cursor: pointer;
}

.assistant-modes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  padding: 12px;
  border-bottom: 1px solid var(--line);
}

.mode-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 12px;
  padding: 9px;
  cursor: pointer;
  font-size: 12px;
  font-weight: 800;
}

.mode-btn.active {
  background: linear-gradient(135deg, var(--purple), var(--orange));
  color: white;
  border-color: transparent;
}

.assistant-messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
}

.bot-message,
.user-message {
  padding: 12px 14px;
  border-radius: 16px;
  margin-bottom: 12px;
  font-size: 14px;
}

.bot-message {
  background: rgba(139, 92, 246, 0.13);
  border: 1px solid rgba(139, 92, 246, 0.18);
}

.user-message {
  background: rgba(255, 138, 61, 0.14);
  border: 1px solid rgba(255, 138, 61, 0.2);
  margin-left: 28px;
}

.assistant-form {
  padding: 14px;
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--line);
}

.assistant-form input {
  flex: 1;
  min-width: 0;
  background: #050507;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: white;
  padding: 11px;
  outline: none;
  font-family: inherit;
}

.assistant-form button {
  background: var(--purple);
  border: none;
  border-radius: 12px;
  color: white;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 900;
  font-family: inherit;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero,
  .intro-band,
  .assistant-zone {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 130px;
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-metrics,
  .about-grid,
  .stories-grid,
  .interview-bank-grid,
  .pillars-grid,
  .dictionary-grid {
    grid-template-columns: 1fr;
  }

  .assistant {
    right: 16px;
    bottom: 92px;
  }

  .ai-trigger {
    right: 18px;
    bottom: 18px;
  }
}