/* ============================================================
   CardioCode AI — Vintage Notebook Aesthetic
   ============================================================ */

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  /* Reserve room for the fixed nav (~76px) plus a comfortable 32px of
     breathing room so anchor-target headings don't sit flush against
     the nav. JS in main.js refines this further using the real nav
     height at click time. */
  scroll-padding-top: 7rem;
  hanging-punctuation: first last;
}

/* Anchor-target safety net: even if JS doesn't run (or a deep link
   is opened directly), every in-page anchor target reserves enough
   space above itself so the heading is comfortably below the nav.
   `section[id]` carries the heavy outer padding (8vw top), so the
   inner `.section-container > .section-label` is the real visible
   top — give the section enough scroll-margin that even a CSS-only
   jump (no JS) lands the SECTION-LABEL near the top of the
   viewport, not the empty padding above it.

   The "9rem + 8vw" formula compensates for: nav (~76px = ~5rem) +
   24px comfort gap + the worst-case section-container top padding
   (8vw, capped at 96px = ~6rem). The vw term scales with viewport
   so wide screens don't over-shoot. */
section[id] {
  scroll-margin-top: calc(7rem + 8vw);
}
*[id]:target {
  scroll-margin-top: 7rem;
}

:root {
  /* Brand Colors */
  --bg: #f5f0e8;
  --bg-warm: #f0ead9;
  --surface: #faf6ee;
  --surface-2: #ede8dc;
  --ink: #2c2416;
  --ink-muted: #6b5d4d;
  --ink-faint: #a89a86;
  --accent: #8b3a2a;
  --accent-hover: #6e2e21;
  --accent-light: rgba(139, 58, 42, 0.08);
  --accent-lighter: rgba(139, 58, 42, 0.04);
  --grid-line: rgba(44, 36, 22, 0.06);
  --border: rgba(44, 36, 22, 0.12);
  --border-strong: rgba(44, 36, 22, 0.2);
  --divider: rgba(44, 36, 22, 0.08);

  /* Fonts */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Menlo', monospace;

  /* Type Scale */
  --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);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --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;
  --space-32: 8rem;

  /* Misc */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-sm: 0 1px 3px rgba(44, 36, 22, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 36, 22, 0.1);
  --shadow-lg: 0 12px 40px rgba(44, 36, 22, 0.14);
  --content-wide: 1200px;
  --content-default: 960px;
  --content-narrow: 640px;
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--ink);
  background-color: var(--bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; }
p, li, figcaption { text-wrap: pretty; max-width: 72ch; }
button { cursor: pointer; background: none; border: none; }

::selection {
  background: rgba(139, 58, 42, 0.2);
  color: var(--ink);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a, button, [role='button'], input, textarea, select {
  transition:
    color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}

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

/* Utility */
.mono { font-family: var(--font-mono); font-size: 0.9em; }

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(245, 240, 232, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--divider);
  transition: box-shadow 0.3s ease;
}
.nav.scrolled {
  box-shadow: 0 2px 20px rgba(44, 36, 22, 0.08);
}
.nav-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--ink);
}
.nav-logo .logo-icon {
  width: 36px;
  height: 28px;
  color: var(--accent);
  display: inline-block;
}
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
}
.logo-ai {
  font-family: var(--font-mono);
  font-size: 0.65em;
  color: var(--accent);
  margin-left: 2px;
  vertical-align: super;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.nav-links a {
  text-decoration: none;
  color: var(--ink-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
}
.nav-links a:hover {
  color: var(--ink);
}
.nav-cta-link {
  color: var(--accent) !important;
  font-weight: 600 !important;
}
.nav-cta-link:hover {
  color: var(--accent-hover) !important;
}
.nav-signin {
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-weight: 500;
}
.nav-signin:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent) !important;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  z-index: 99;
  padding: var(--space-4) var(--space-6);
  flex-direction: column;
  gap: var(--space-3);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  display: block;
  text-decoration: none;
  color: var(--ink);
  font-size: var(--text-base);
  font-weight: 500;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--divider);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* === HERO === */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--space-24) + 60px) var(--space-6) var(--space-16);
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 40%, black 30%, transparent 100%);
}

.hero-content {
  max-width: var(--content-wide);
  margin: 0 auto;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
  color: var(--accent);
}
.hero-badge-icon {
  width: 48px;
  height: 38px;
  display: inline-block;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  color: var(--ink);
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}
.hero-subtitle {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--accent);
  margin-bottom: var(--space-6);
  font-weight: 500;
}
.hero-desc {
  font-size: var(--text-base);
  color: var(--ink-muted);
  max-width: 560px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Code window illustration */
.hero-illustration {
  position: absolute;
  right: max(var(--space-6), 5vw);
  top: 50%;
  transform: translateY(-50%);
  width: 380px;
  z-index: 1;
}
.code-window {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.code-window-bar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--surface-2);
  border-bottom: 1px solid var(--divider);
}
.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #e67e73; }
.dot-yellow { background: #e5c07b; }
.dot-green { background: #98c379; }
.code-window-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-muted);
  margin-left: var(--space-2);
}
.code-window-body {
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.8;
}
.code-window-body code {
  display: block;
  white-space: pre;
}
.code-kw { color: var(--accent); font-weight: 600; }
.code-fn { color: #4a6f8a; }
.code-str { color: #5a7f3a; }
.code-num { color: #b07d3a; }
.code-cm { color: var(--ink-faint); font-style: italic; }
.code-cursor {
  display: inline;
  animation: blink 1s steps(2) infinite;
  color: var(--accent);
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@media (max-width: 1024px) {
  .hero-illustration { display: none; }
  .hero { min-height: auto; padding-top: calc(var(--space-20) + 60px); }
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive),
    box-shadow var(--transition-interactive),
    transform var(--transition-interactive),
    border-color var(--transition-interactive);
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}
.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}
.btn-secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--border-strong);
}
.btn-secondary:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-outline:hover {
  background: var(--accent);
  color: var(--bg);
}
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* === SECTIONS === */
.section-container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}
.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: var(--space-3);
  font-weight: 500;
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--ink);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: var(--text-base);
  color: var(--ink-muted);
  max-width: 600px;
  margin-bottom: var(--space-10);
  line-height: 1.7;
}

/* === SOCIAL PROOF === */
.social-proof {
  background: var(--surface-2);
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
}
.social-proof-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-6) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  flex-wrap: wrap;
}
.proof-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--accent);
  white-space: nowrap;
  padding: var(--space-1) var(--space-3);
  background: var(--accent-light);
  border-radius: var(--radius-sm);
}
.proof-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.proof-text {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  flex: 1;
  min-width: 200px;
}
.proof-link {
  font-size: var(--text-sm);
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  white-space: nowrap;
}
.proof-link:hover {
  color: var(--accent-hover);
}

/* === FEATURES === */
.features {
  position: relative;
}
.features::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.5;
  mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
}
.features .section-container { position: relative; z-index: 1; }

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: var(--space-5);
}

.feature-tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    box-shadow var(--transition-interactive),
    border-color var(--transition-interactive),
    transform var(--transition-interactive);
  cursor: pointer;
}
.feature-tile:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
  transform: translateY(-2px);
}
.feature-tile.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-md);
  transform: translateY(0);
}
.feature-tile.active:hover {
  transform: translateY(0);
}

.feature-tile-header {
  padding: var(--space-6);
  position: relative;
}
.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  color: var(--accent);
}
.feature-icon svg {
  width: 22px;
  height: 22px;
}
.feature-tile-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--ink);
  margin-bottom: var(--space-2);
}
.feature-tile-summary {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.6;
}
.feature-expand-indicator {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--ink-faint);
  transition: all var(--transition-interactive);
}
.feature-expand-indicator svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease-out);
}
.feature-tile.active .feature-expand-indicator svg {
  transform: rotate(45deg);
}
.feature-tile.active .feature-expand-indicator {
  color: var(--accent);
}

.feature-tile-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
}
.feature-tile.active .feature-tile-detail {
  max-height: 600px;
}
.feature-detail-content {
  padding: 0 var(--space-6) var(--space-6);
  border-top: 1px solid var(--divider);
  padding-top: var(--space-5);
}
.feature-detail-content p {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.7;
  margin-bottom: var(--space-3);
}
.feature-detail-content ul {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-4);
}
.feature-detail-content li {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.7;
  padding: var(--space-2) 0;
  padding-left: var(--space-5);
  position: relative;
}
.feature-detail-content li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.5;
}
.feature-detail-content li strong {
  color: var(--ink);
  font-weight: 600;
}
.feature-detail-note {
  background: var(--accent-lighter);
  border: 1px solid var(--accent-light);
  border-left: 3px solid var(--accent);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: var(--text-sm) !important;
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* === DEMO VIDEO === */
.demo {
  background: var(--surface-2);
  border-top: 1px solid var(--divider);
}
.demo-player-wrap {
  max-width: 900px;
  margin: 0 auto;
}

/* Chapter strip: lets prospects jump straight to the bit they care
   about. Looks like a row of pill-tabs below the video. */
.demo-chapters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
  justify-content: center;
}
.demo-chapter {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--ink);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}
.demo-chapter:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}
.demo-chapter:active { transform: translateY(1px); }
.demo-chapter-time {
  font-family: var(--font-mono);
  color: var(--accent);
  font-weight: 600;
}
.demo-chapter-label {
  color: var(--ink-muted);
}

/* Speed control row */
.demo-controls-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-3);
  font-size: var(--text-xs);
}
.demo-controls-label {
  font-family: var(--font-mono);
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.demo-speed {
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-muted);
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.demo-speed:hover { border-color: var(--accent); color: var(--ink); }
.demo-speed.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.demo-player {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 9;
  background: var(--ink);
}
/* Video poster overlay */
.demo-poster {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  background: var(--ink);
  transition: opacity 0.4s ease;
}
.demo-poster.hidden {
  opacity: 0;
  pointer-events: none;
}
.demo-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
/* Custom controls bar */
.demo-controls {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: linear-gradient(transparent, rgba(44, 36, 22, 0.85));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.demo-player:hover .demo-controls,
.demo-player.playing .demo-controls {
  opacity: 1;
}
.demo-controls button {
  background: none;
  border: none;
  color: var(--bg);
  cursor: pointer;
  padding: 4px;
  display: flex;
  align-items: center;
}
.demo-controls button svg {
  width: 20px;
  height: 20px;
}
.demo-progress-wrap {
  flex: 1;
  height: 4px;
  background: rgba(245, 240, 232, 0.25);
  border-radius: 2px;
  cursor: pointer;
  position: relative;
}
.demo-progress-wrap:hover {
  height: 6px;
}
.demo-progress-bar {
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
  width: 0%;
  transition: width 0.1s linear;
}
.demo-time {
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(245, 240, 232, 0.7);
  white-space: nowrap;
  min-width: 72px;
  text-align: center;
}

.demo-play-btn {
  position: relative;
  z-index: 2;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-interactive);
  box-shadow: 0 8px 32px rgba(139, 58, 42, 0.4);
}
.demo-play-btn svg {
  width: 32px;
  height: 32px;
  margin-left: 4px;
}
.demo-poster:hover .demo-play-btn {
  transform: scale(1.08);
  box-shadow: 0 12px 40px rgba(139, 58, 42, 0.5);
}
.demo-duration {
  position: absolute;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: 2;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: rgba(245, 240, 232, 0.6);
}

/* === HOW IT LEARNS === */
.learns {
  position: relative;
}
.learns::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.4;
  mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
}
.learns .section-container { position: relative; z-index: 1; }

.learns-flow {
  max-width: 640px;
  margin: 0;
}
.learns-step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
}
.learns-step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--text-sm);
  border-radius: 50%;
}
.learns-step-content h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--ink);
  margin-bottom: var(--space-2);
}
.learns-step-content p {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.7;
}
.learns-step-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--accent-lighter);
  border: 1px solid var(--accent-light);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  color: var(--accent);
}
.learns-connector {
  padding-left: 12px;
  height: 48px;
  display: flex;
  align-items: center;
  color: var(--ink-faint);
}
.learns-connector svg {
  width: 24px;
  height: 48px;
}

.learns-callout {
  max-width: 640px;
  margin-top: var(--space-8);
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.learns-callout-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  color: var(--accent);
}
.learns-callout-icon svg { width: 24px; height: 24px; }
.learns-callout p {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.7;
}
.learns-callout strong {
  color: var(--ink);
}

/* === EHR INTEGRATIONS === */
.integrations {
  background: var(--surface-2);
  border-top: 1px solid var(--divider);
}
.ehr-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.ehr-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-4);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-interactive);
}
.ehr-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.ehr-logo-placeholder {
  width: 48px;
  height: 48px;
  color: var(--ink-muted);
}
.ehr-logo-placeholder svg { width: 48px; height: 48px; }
.ehr-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--ink);
  text-align: center;
  line-height: 1.3;
}
.ehr-alias {
  display: block;
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--ink-muted);
}
.ehr-note {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  text-align: center;
}
.ehr-note strong {
  color: var(--accent);
}

@media (max-width: 600px) {
  .ehr-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }
}

/* === PRICING === */
.pricing {
  position: relative;
}
.pricing::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
  opacity: 0.3;
  mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
}
.pricing .section-container { position: relative; z-index: 1; }

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  align-items: start;
}
.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  display: flex;
  flex-direction: column;
  position: relative;
}
.pricing-card-featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-lg);
  padding-top: calc(var(--space-8) + 12px);
}
.pricing-badge-popular {
  position: absolute;
  top: -1px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  padding: var(--space-1) var(--space-4);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.pricing-card-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--divider);
}
.pricing-tier {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--ink);
  margin-bottom: var(--space-2);
}
.pricing-price {
  display: flex;
  align-items: baseline;
  gap: 2px;
  margin-bottom: var(--space-2);
}
.pricing-dollar {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--ink-muted);
}
.pricing-amount {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--ink);
  letter-spacing: -0.02em;
}
.pricing-period {
  font-size: var(--text-sm);
  color: var(--ink-muted);
}
.pricing-audience {
  font-size: var(--text-sm);
  color: var(--ink-faint);
}
.pricing-features {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-8);
  flex: 1;
}
.pricing-features li {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  padding: var(--space-2) 0;
  padding-left: var(--space-6);
  position: relative;
  line-height: 1.6;
}
.pricing-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.85em;
}
.pricing-card .btn {
  width: 100%;
  text-align: center;
}

@media (max-width: 900px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 440px;
  }
}

/* === FAQ === */
.faq {
  background: var(--surface-2);
  border-top: 1px solid var(--divider);
}
.faq .section-container {
  position: relative;
  z-index: 1;
}

.faq-list {
  max-width: 760px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}

.faq-item {
  border-bottom: 1px solid var(--divider);
}
.faq-item:last-child {
  border-bottom: none;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6);
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--ink);
  transition:
    background var(--transition-interactive),
    color var(--transition-interactive);
}
.faq-question:hover {
  background: var(--accent-lighter);
  color: var(--accent);
}
.faq-item.active .faq-question {
  color: var(--accent);
  background: var(--accent-lighter);
}
.faq-question span:first-child {
  flex: 1;
  line-height: 1.5;
}

.faq-indicator {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--ink-faint);
  transition: all var(--transition-interactive);
}
.faq-indicator svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease-out);
}
.faq-item.active .faq-indicator svg {
  transform: rotate(45deg);
}
.faq-item.active .faq-indicator {
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease-out);
}
.faq-item.active .faq-answer {
  max-height: 400px;
}
.faq-answer p {
  padding: 0 var(--space-6) var(--space-5);
  font-size: var(--text-sm);
  color: var(--ink-muted);
  line-height: 1.75;
  border-top: 1px solid var(--divider);
  padding-top: var(--space-4);
  margin: 0;
  max-width: none;
}
.faq-answer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}
.faq-answer a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .faq-question {
    padding: var(--space-4) var(--space-4);
  }
  .faq-answer p {
    padding: 0 var(--space-4) var(--space-4);
    padding-top: var(--space-3);
  }
}

/* === BETA CTA === */
.beta-cta {
  background: var(--surface-2);
  border-top: 1px solid var(--divider);
}
.beta-cta-card {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: var(--space-12) var(--space-8);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}
.beta-cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.5;
}
.beta-cta-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--ink);
  margin-bottom: var(--space-4);
  position: relative;
  letter-spacing: -0.02em;
}
.beta-cta-desc {
  font-size: var(--text-base);
  color: var(--ink-muted);
  max-width: 600px;
  margin: 0 auto var(--space-8);
  line-height: 1.7;
  position: relative;
}
.beta-form {
  position: relative;
  text-align: left;
}
.beta-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4) var(--space-6);
  margin-bottom: var(--space-6);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.form-group-wide {
  grid-column: 1 / -1;
}
.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink);
}
.form-group .required {
  color: var(--accent);
}
.form-group .optional {
  font-weight: 400;
  color: var(--ink-faint);
  font-size: var(--text-xs);
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: var(--space-2) var(--space-3);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  color: var(--ink);
  transition:
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(139, 58, 42, 0.1);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--ink-faint);
}
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b5e51' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
  cursor: pointer;
}
.form-group textarea {
  resize: vertical;
  min-height: 72px;
}
.form-hint {
  font-size: var(--text-xs);
  color: var(--ink-faint);
  line-height: 1.4;
}
.form-group input.error,
.form-group select.error {
  border-color: #b33a3a;
  box-shadow: 0 0 0 3px rgba(179, 58, 58, 0.1);
}
.form-group .error-msg {
  font-size: var(--text-xs);
  color: #b33a3a;
  margin-top: 2px;
}

/* Plan radio selector */
.plan-select {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.plan-option {
  cursor: pointer;
}
.plan-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.plan-option-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--ink-muted);
  transition: all var(--transition-interactive);
  background: var(--bg);
}
.plan-option input:checked + .plan-option-label {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(139, 58, 42, 0.05);
  font-weight: 500;
}
.plan-option:hover .plan-option-label {
  border-color: var(--ink-faint);
}
.plan-option-price {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  opacity: 0.7;
}

/* Form footer */
.beta-form-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  position: relative;
}
.turnstile-wrap {
  min-height: 65px;
}
#betaSubmitBtn {
  min-width: 220px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}
#betaSubmitBtn .btn-spinner {
  width: 20px;
  height: 20px;
}
#betaSubmitBtn .btn-spinner svg {
  width: 20px;
  height: 20px;
}
#betaSubmitBtn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}
.form-status {
  font-size: var(--text-sm);
  text-align: center;
  min-height: 24px;
}
.form-status.success {
  color: #2a7a3a;
}
.form-status.error {
  color: #b33a3a;
}
.beta-form-note {
  font-size: var(--text-xs);
  color: var(--ink-faint);
  position: relative;
  text-align: center;
}
.beta-form-note a {
  color: var(--accent);
  text-decoration: none;
}
.beta-form-note a:hover {
  text-decoration: underline;
}

@media (max-width: 600px) {
  .beta-form-grid {
    grid-template-columns: 1fr;
  }
  .beta-cta-card {
    padding: var(--space-8) var(--space-4);
  }
  .plan-select {
    flex-direction: column;
  }
}

/* === FOOTER === */
.footer {
  border-top: 1px solid var(--divider);
  background: var(--bg);
}
.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-12) var(--space-6) var(--space-8);
}
.footer-brand {
  margin-bottom: var(--space-8);
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--ink);
  margin-bottom: var(--space-3);
}
.footer-logo .logo-icon {
  width: 32px;
  height: 26px;
  color: var(--accent);
  display: inline-block;
}
.footer-tagline {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--ink-faint);
  letter-spacing: 0.02em;
}
.footer-links {
  display: flex;
  gap: var(--space-16);
  margin-bottom: var(--space-8);
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--ink);
  margin-bottom: var(--space-2);
  font-weight: 600;
}
.footer-col a {
  text-decoration: none;
  color: var(--ink-muted);
  font-size: var(--text-sm);
  transition: color var(--transition-interactive);
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--divider);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--ink-faint);
}
.footer-contact {
  font-family: var(--font-mono);
}

@media (max-width: 600px) {
  .footer-links { gap: var(--space-8); }
}

/* === SCROLL ANIMATIONS === */
.fade-in {
  opacity: 1;
}

@supports (animation-timeline: scroll()) {
  .fade-in {
    opacity: 0;
    animation: reveal-fade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 100%;
  }
}

@keyframes reveal-fade {
  to { opacity: 1; }
}