:root {
  --bg: #0b0f17;
  --surface: #0f1624;
  --surface-2: #111a2a;
  --text: rgba(255, 255, 255, 0.92);
  --muted: rgba(255, 255, 255, 0.68);
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);

  --accent: #6ee7ff;
  --accent-2: #7c5cff;

  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 12px;

  --container: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 800px at 20% 0%, rgba(110, 231, 255, 0.12), transparent 55%),
              radial-gradient(900px 700px at 90% 20%, rgba(124, 92, 255, 0.12), transparent 50%),
              var(--bg);
}

.page-shell {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  padding: 20px 0 72px;
}

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 0.95rem;
}

.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: inline-block;
}

.top-link {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  opacity: 0.9;
}

.top-link:hover { opacity: 1; }

/* Layout */
.hero {
  padding: 18px 0 10px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: start;
  margin-top: 18px;
}

.hero-copy { padding: 6px 8px; }

.eyebrow {
  margin: 0 0 12px;
  color: var(--muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.78rem;
  font-weight: 700;
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 3.2vw, 3.1rem);
  max-width: 22ch;
}

h2 { font-size: clamp(1.5rem, 2.3vw, 2.2rem); }
h3 { font-size: 1.15rem; letter-spacing: -0.01em; }

p { margin: 0; line-height: 1.65; }

.hero-text {
  max-width: 64ch;
  margin-top: 16px;
  font-size: 1.02rem;
  color: var(--muted);
}

/* Buttons */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 10px 16px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.button:hover { transform: translateY(-1px); }

.button-primary {
  color: #071018;
  background: linear-gradient(135deg, var(--accent), rgba(110, 231, 255, 0.7));
  box-shadow: 0 10px 24px rgba(110, 231, 255, 0.12);
}

.button-primary:hover {
  box-shadow: 0 14px 30px rgba(110, 231, 255, 0.18);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--line);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
}

/* Pills */
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.hero-points li {
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font-size: 0.92rem;
}

/* Cards */
.hero-card,
.info-card,
.workbook-panel,
.audience-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 18px;
}

.card-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.mode-card {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.mode-card:first-of-type {
  border-top: 0;
  padding-top: 4px;
}

.mode-index {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #071018;
  background: linear-gradient(135deg, rgba(110, 231, 255, 0.95), rgba(124, 92, 255, 0.8));
}

.mode-card h2 {
  font-size: 1.08rem;
  letter-spacing: -0.01em;
}

.mode-card p {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.98rem;
}

/* Sections */
.section { margin-top: 56px; }

.section-intro {
  max-width: 72ch;
  margin-bottom: 18px;
}

.section-intro.narrow { max-width: 62ch; }

.promise-grid,
.audience-list {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card,
.audience-item {
  padding: 18px;
  border-radius: var(--radius-md);
}

.info-card p,
.audience-item p {
  margin-top: 10px;
  color: var(--muted);
}

/* Workbook */
.workbook-panel {
  padding: 22px;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(800px 260px at 20% 0%, rgba(110, 231, 255, 0.10), transparent 60%),
    radial-gradient(700px 280px at 90% 0%, rgba(124, 92, 255, 0.10), transparent 62%),
    rgba(255, 255, 255, 0.03);
}

.workbook-lead {
  max-width: 70ch;
  margin-top: 10px;
  font-size: 1.02rem;
  color: var(--muted);
}

.workbook-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.workbook-note p { color: var(--muted); }

/* Responsive */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .promise-grid,
  .audience-list { grid-template-columns: 1fr; }
  .workbook-note { flex-direction: column; align-items: stretch; }
}

@media (max-width: 640px) {
  .page-shell { width: min(100% - 20px, var(--container)); }
  .topbar { padding: 12px 14px; }
  .button { width: 100%; }
  h1 { max-width: 26ch; }
}