:root,
[data-theme='light'] {
  --font-display: 'Cabinet Grotesk', 'Arial', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --color-bg: #f5f1e8;
  --color-surface: #fbf8f0;
  --color-surface-2: #ede6d8;
  --color-text: #171b1c;
  --color-muted: #5e6463;
  --color-border: #d8ccba;
  --color-primary: #0d6b69;
  --color-primary-hover: #084d4c;
  --color-warning: #9a4d20;
  --shadow: 0 24px 70px rgba(23, 27, 28, 0.12);
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
}

[data-theme='dark'] {
  --color-bg: #101313;
  --color-surface: #171b1c;
  --color-surface-2: #212727;
  --color-text: #f2eee6;
  --color-muted: #b8b0a4;
  --color-border: #303a39;
  --color-primary: #5dbab4;
  --color-primary-hover: #86d4cf;
  --color-warning: #d08a58;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  background:
    linear-gradient(135deg, rgba(13, 107, 105, 0.08), transparent 32rem),
    var(--color-bg);
  color: var(--color-text);
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: var(--space-4);
  transform: translateY(-200%);
  background: var(--color-text);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  z-index: 100;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  border-bottom: 1px solid color-mix(in oklab, var(--color-border), transparent 45%);
  background: color-mix(in oklab, var(--color-bg), transparent 12%);
}

.nav {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  align-items: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary);
  stroke: currentColor;
  stroke-width: 3;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
}

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

.theme-toggle {
  width: 44px;
  height: 44px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text);
}

.hero,
.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: clamp(var(--space-8), 6vw, var(--space-20));
  align-items: center;
}

.eyebrow,
.section-kicker,
.mock-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.04em;
  line-height: 1.05;
}

h1 {
  margin-top: var(--space-4);
  font-size: var(--text-2xl);
  max-width: 12ch;
}

h2 {
  font-size: var(--text-xl);
  max-width: 15ch;
}

h3 {
  font-size: var(--text-lg);
}

.lede {
  margin-top: var(--space-6);
  max-width: 62ch;
  color: var(--color-muted);
  font-size: var(--text-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: var(--space-3) var(--space-5);
  text-decoration: none;
  font-weight: 700;
  font-size: var(--text-sm);
  border: 1px solid transparent;
}

.button.primary {
  background: var(--color-primary);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--color-primary-hover);
}

.button.secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.button.full {
  width: 100%;
  margin-top: var(--space-6);
}

.disclaimer,
.form-note {
  margin-top: var(--space-4);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.workbook-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow);
}

.mock-window {
  min-height: 420px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(90deg, color-mix(in oklab, var(--color-border), transparent 72%) 1px, transparent 1px),
    linear-gradient(color-mix(in oklab, var(--color-border), transparent 72%) 1px, transparent 1px),
    var(--color-bg);
  background-size: 28px 28px;
  padding: var(--space-6);
}

.window-dots {
  display: flex;
  gap: var(--space-2);
  margin-bottom: var(--space-12);
}

.window-dots span {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 999px;
  background: var(--color-border);
}

.mock-window h2 {
  margin-top: var(--space-3);
  max-width: 9ch;
}

.worksheet-lines {
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-3);
}

.worksheet-lines span {
  display: block;
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--color-surface), transparent 8%);
  border: 1px solid var(--color-border);
  color: var(--color-muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1fr);
  gap: clamp(var(--space-8), 6vw, var(--space-20));
}

.split p + p {
  margin-top: var(--space-4);
}

.section-kicker {
  margin-bottom: var(--space-4);
}

.timeline {
  margin-top: var(--space-10);
  display: grid;
  grid-template-columns: repeat(7, minmax(220px, 1fr));
  gap: var(--space-4);
  overflow-x: auto;
  padding-bottom: var(--space-4);
}

.timeline article {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  min-height: 220px;
}

.timeline span {
  display: inline-flex;
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-8);
}

.timeline p,
.kit-card li {
  margin-top: var(--space-3);
  color: var(--color-muted);
}

.download-panel,
.kit-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-6), 5vw, var(--space-12));
  box-shadow: var(--shadow);
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
  gap: var(--space-10);
  align-items: center;
}

.lead-form label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.form-row {
  display: flex;
  gap: var(--space-3);
}

input[type='email'] {
  flex: 1;
}

input[type='email'],
input[type='text'],
select {
  min-height: 48px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  padding: 0 var(--space-5);
  background: var(--color-bg);
  color: var(--color-text);
  width: 100%;
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-muted) 50%), linear-gradient(135deg, var(--color-muted) 50%, transparent 50%);
  background-position: calc(100% - 20px) 52%, calc(100% - 14px) 52%;
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.kit-card ul {
  list-style-position: inside;
  margin-top: var(--space-4);
}

.bridge-hero h1 {
  max-width: 13ch;
}

.bridge-card {
  background:
    radial-gradient(circle at 80% 20%, color-mix(in oklab, var(--color-primary), transparent 70%), transparent 18rem),
    var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow);
}

.bridge-panel {
  min-height: 440px;
  border-radius: var(--radius-md);
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--color-primary), transparent 88%), transparent 22rem),
    var(--color-bg);
  padding: var(--space-6);
  display: grid;
  align-content: start;
  gap: var(--space-6);
}

.bridge-panel h2 {
  max-width: 11ch;
}

.bridge-score {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: center;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}

.bridge-score span {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.05em;
  color: var(--color-primary);
}

.bridge-score p {
  color: var(--color-muted);
  font-weight: 700;
}

.bridge-checklist,
.feature-grid {
  display: grid;
  gap: var(--space-3);
}

.bridge-checklist span,
.feature-grid article {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: color-mix(in oklab, var(--color-surface), transparent 6%);
}

.bridge-checklist span {
  padding: var(--space-3);
  color: var(--color-muted);
}

.bridge-checklist span::before {
  content: '✓';
  color: var(--color-primary);
  font-weight: 700;
  margin-right: var(--space-2);
}

.feature-grid {
  margin-top: var(--space-8);
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-grid article {
  padding: var(--space-5);
}

.feature-grid p {
  margin-top: var(--space-3);
  color: var(--color-muted);
}

.waitlist-panel {
  align-items: start;
}

.waitlist-form {
  display: grid;
  gap: var(--space-3);
}

.waitlist-form fieldset {
  display: grid;
  gap: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}

.waitlist-form legend {
  padding: 0 var(--space-2);
  font-weight: 700;
}

.waitlist-form fieldset label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-muted);
  font-weight: 500;
}

.waitlist-form input[type='checkbox'] {
  width: 1rem;
  height: 1rem;
  margin-top: 0.25rem;
  accent-color: var(--color-primary);
}

.source-list {
  margin-top: var(--space-8);
  display: grid;
  gap: var(--space-3);
}

.source-list a {
  display: block;
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 700;
}

.footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-8) var(--space-6);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.footer p {
  max-width: 1180px;
  margin: 0 auto;
}

.success-page {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-6);
}

.success-card {
  max-width: 640px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-8), 6vw, var(--space-16));
  box-shadow: var(--shadow);
}

.success-card p {
  margin: var(--space-5) 0;
  color: var(--color-muted);
}

@media (max-width: 820px) {
  .hero,
  .split,
  .download-panel,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .nav {
    align-items: flex-start;
  }

  .nav-actions {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .form-row {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}