/* ============================================================
   Beatrx — website styles
   Dark Cinematic Neuro-Tech design system (matches the app),
   with a warm-paper light theme. WCAG 2.1 AA+ minded:
   18px+ body, strong contrast, no italic body text, visible
   focus, 44px+ targets, reduced-motion support.
   ============================================================ */

:root {
  --bg-0: #05070a;
  --bg-1: #0a0e14;
  --bg-2: #131923;
  --line: rgba(240, 233, 216, 0.12);
  --line-2: rgba(240, 233, 216, 0.22);
  --ink: #f0e9d8;
  --ink-dim: #b8c1ce;
  --ink-faint: #98a2b3;
  --cyan: #5eead4;
  --cyan-glow: #00f5d4;
  --amber: #fbbf24;
  --coral: #ff6b6b;
  --violet: #a78bfa;
  --on-accent: #05070a;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg-0: #f3efe6;
  --bg-1: #fbf9f3;
  --bg-2: #e9e4d7;
  --line: rgba(35, 43, 56, 0.14);
  --line-2: rgba(35, 43, 56, 0.26);
  --ink: #232b38;
  --ink-dim: #4a5568;
  --ink-faint: #5d6878;
  --cyan: #0f766e;
  --cyan-glow: #0d9488;
  --amber: #b45309;
  --coral: #c93b3b;
  --violet: #6d28d9;
  --on-accent: #ffffff;
  --shadow: 0 18px 44px rgba(35, 43, 56, 0.16);
  color-scheme: light;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --bg-0: #f3efe6;
    --bg-1: #fbf9f3;
    --bg-2: #e9e4d7;
    --line: rgba(35, 43, 56, 0.14);
    --line-2: rgba(35, 43, 56, 0.26);
    --ink: #232b38;
    --ink-dim: #4a5568;
    --ink-faint: #5d6878;
    --cyan: #0f766e;
    --cyan-glow: #0d9488;
    --amber: #b45309;
    --coral: #c93b3b;
    --violet: #6d28d9;
    --on-accent: #ffffff;
    --shadow: 0 18px 44px rgba(35, 43, 56, 0.16);
    color-scheme: light;
  }
}

/* ---------- Reset & base ---------- */

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

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg-0);
  background-image:
    radial-gradient(900px 480px at 50% -10%, color-mix(in srgb, var(--cyan) 9%, transparent), transparent 70%),
    radial-gradient(700px 420px at 95% 100%, color-mix(in srgb, var(--violet) 7%, transparent), transparent 70%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: "Manrope", "Avenir Next", system-ui, -apple-system, sans-serif;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.7;
}

img { max-width: 100%; display: block; }

h1, h2, h3 {
  font-family: "Fraunces", Georgia, serif;
  font-weight: 500;
  line-height: 1.15;
  margin: 0 0 0.4em;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(38px, 5.5vw, 60px); }
h2 { font-size: clamp(30px, 4vw, 42px); }
h3 { font-size: 22px; }

p { margin: 0 0 1em; color: var(--ink-dim); }

a { color: var(--cyan); text-underline-offset: 3px; }

em, .em { font-style: normal; color: var(--cyan); }  /* colour, never italics */

.mono-label {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

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

/* Visible, generous focus everywhere */
:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip-link {
  position: absolute;
  left: 16px; top: -60px;
  z-index: 100;
  background: var(--cyan);
  color: var(--on-accent);
  font-weight: 700;
  padding: 12px 18px;
  border-radius: 12px;
  text-decoration: none;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 12px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 22px; }

section { padding: 72px 0; }
section[id] { scroll-margin-top: 90px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg-0) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  font-family: "Fraunces", Georgia, serif;
  font-size: 24px;
  margin-right: auto;
}
.brand svg { flex: none; }

.site-nav { display: flex; align-items: center; gap: 4px; }

.site-nav a {
  color: var(--ink-dim);
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  padding: 12px 14px;
  border-radius: 12px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.site-nav a:hover { color: var(--ink); background: var(--bg-2); }

.nav-toggle {
  display: none;
  background: var(--bg-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 12px;
  min-width: 48px; min-height: 48px;
  font-size: 22px;
  cursor: pointer;
}

.theme-toggle {
  background: var(--bg-2);
  color: var(--ink-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  min-height: 48px;
  padding: 0 18px;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--line-2); }

@media (max-width: 480px) {
  .brand { font-size: 19px; gap: 8px; white-space: nowrap; }
  .brand svg { width: 27px; height: 27px; }
  .theme-toggle { padding: 0 13px; font-size: 13px; white-space: nowrap; }
}

@media (max-width: 880px) {
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }
  .site-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-1);
    border-bottom: 1px solid var(--line);
    padding: 10px 16px 16px;
    gap: 2px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { font-size: 18px; padding: 14px; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 56px;
  padding: 0 28px;
  border-radius: 16px;
  font: inherit;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--cyan);
  color: var(--on-accent);
  box-shadow: 0 10px 30px color-mix(in srgb, var(--cyan) 35%, transparent);
}

.btn-secondary {
  background: var(--bg-2);
  color: var(--ink);
  border-color: var(--line-2);
}

/* ---------- Hero ---------- */

.hero { padding: 64px 0 28px; text-align: center; }

.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink-dim);
  border-radius: 999px;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 26px;
}
.hero .eyebrow .dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--cyan-glow);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.hero p.lede {
  max-width: 640px;
  margin: 0 auto 30px;
  font-size: 20px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
  margin-bottom: 14px;
}

.hero-note { font-size: 14px; color: var(--ink-faint); }

/* ---------- Feature slider (carousel) ---------- */

.slider-section { padding: 26px 0 70px; }

.slider {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(720px 380px at 18% 0%, color-mix(in srgb, var(--cyan) 8%, transparent), transparent 70%),
    var(--bg-1);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.slides-viewport { overflow: hidden; }

.slides-track {
  display: flex;
  transition: transform 0.55s var(--ease);
}
@media (prefers-reduced-motion: reduce) {
  .slides-track { transition: none; }
}

.slide {
  flex: 0 0 100%;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 30px;
  align-items: center;
  padding: 48px 56px;
  min-height: 480px;
}

.slide-text .slide-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.slide-text h3 {
  font-size: clamp(26px, 3vw, 36px);
  margin-bottom: 12px;
}
.slide-text p { font-size: 18px; max-width: 46ch; }

.slide-points {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.slide-points li {
  display: flex;
  gap: 10px;
  align-items: baseline;
  color: var(--ink-dim);
  font-size: 16px;
}
.slide-points li::before {
  content: "";
  flex: none;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--accent, var(--cyan));
  transform: translateY(-1px);
}

.slide-visual { display: flex; justify-content: center; }

/* Phone frame around real screenshots */
.phone {
  width: min(290px, 72vw);
  border-radius: 44px;
  border: 1px solid var(--line-2);
  background: #05070a;
  padding: 10px;
  box-shadow: var(--shadow);
  position: relative;
}
.phone::after {            /* dynamic island */
  content: "";
  position: absolute;
  top: 20px; left: 50%;
  transform: translateX(-50%);
  width: 86px; height: 24px;
  border-radius: 999px;
  background: #05070a;
}
.phone img { border-radius: 34px; width: 100%; height: auto; }

/* Coach-card visual for the Apple Intelligence slide */
.coach-visual {
  max-width: 420px;
  width: 100%;
  display: grid;
  gap: 14px;
}
.coach-card {
  background: color-mix(in srgb, var(--violet) 9%, var(--bg-1));
  border: 1px solid color-mix(in srgb, var(--violet) 30%, transparent);
  border-radius: 20px;
  padding: 22px;
}
.coach-card .coach-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}
.coach-card .coach-head .mono-label { color: var(--violet); }
.coach-card blockquote {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--ink);
  line-height: 1.6;
}
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink-dim);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
}

/* Slider controls */
.slider-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 18px 22px 26px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.slider-btn {
  background: var(--bg-2);
  border: 1px solid var(--line);
  color: var(--ink);
  border-radius: 999px;
  min-width: 52px;
  min-height: 52px;
  font-size: 20px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.slider-btn:hover { border-color: var(--line-2); background: var(--bg-1); }

.slider-dots {
  display: flex;
  gap: 6px;
  align-items: center;
}
.slider-dots button {
  appearance: none;
  border: 0;
  background: transparent;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 999px;
}
.slider-dots button span {
  display: block;
  width: 10px; height: 10px;
  border-radius: 999px;
  background: var(--line-2);
  transition: width 0.25s var(--ease), background 0.25s var(--ease);
}
.slider-dots button[aria-current="true"] span {
  width: 30px;
  background: var(--cyan);
}

@media (max-width: 880px) {
  .slide {
    grid-template-columns: 1fr;
    text-align: center;
    padding: 36px 24px;
    gap: 26px;
  }
  .slide-text p, .slide-points { margin-left: auto; margin-right: auto; }
  .slide-points li { justify-content: center; }
  .slide-text .slide-kicker { justify-content: center; }
  .slide-visual { order: -1; }
  .phone { width: min(230px, 62vw); }
}

/* ---------- Cards & grids ---------- */

.section-head { max-width: 720px; margin-bottom: 40px; }
.section-head .mono-label { display: block; margin-bottom: 12px; }

.grid {
  display: grid;
  gap: 18px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 26px;
}

.card.accent-left { border-left: 4px solid var(--accent, var(--cyan)); }

.card h3 { color: var(--accent, var(--ink)); font-family: "Manrope", system-ui, sans-serif; font-weight: 800; font-size: 19px; }
.card p { font-size: 16px; margin-bottom: 0; }

.icon-chip {
  width: 52px; height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent, var(--cyan)) 14%, transparent);
  color: var(--accent, var(--cyan));
  margin-bottom: 16px;
  font-size: 24px;
}

/* Steps */
.step-num {
  font-family: "Fraunces", Georgia, serif;
  font-size: 26px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--cyan);
  color: var(--on-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

/* Quality legend chips */
.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}
.legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-dim);
}
.legend i {
  width: 10px; height: 10px;
  border-radius: 50%;
  font-style: normal;
}

/* Trust strip */
.trust-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.trust-strip ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 34px;
  justify-content: center;
}
.trust-strip li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink-dim);
  font-size: 15px;
  font-weight: 600;
}
.trust-strip li::before {
  content: "✓";
  color: var(--cyan);
  font-weight: 800;
}

/* Apple Intelligence + Privacy split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  align-items: stretch;
}
@media (max-width: 880px) { .split { grid-template-columns: 1fr; } }

.panel {
  border-radius: 26px;
  padding: 34px;
  border: 1px solid var(--line);
  background: var(--bg-1);
}
.panel.violet {
  background: color-mix(in srgb, var(--violet) 8%, var(--bg-1));
  border-color: color-mix(in srgb, var(--violet) 28%, transparent);
}
.panel.cyan {
  background: color-mix(in srgb, var(--cyan) 7%, var(--bg-1));
  border-color: color-mix(in srgb, var(--cyan) 26%, transparent);
}
.panel ul {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}
.panel li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  color: var(--ink-dim);
  font-size: 16px;
}
.panel li::before {
  content: "•";
  color: var(--accent, var(--cyan));
  font-weight: 800;
}
.panel.violet { --accent: var(--violet); }
.panel.cyan { --accent: var(--cyan); }

/* Disclaimer + final CTA */
.disclaimer {
  border: 1px dashed var(--line-2);
  border-radius: 18px;
  padding: 22px 26px;
  font-size: 15px;
  color: var(--ink-faint);
}

.cta-final {
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(560px 280px at 50% 0%, color-mix(in srgb, var(--cyan) 10%, transparent), transparent 70%),
    var(--bg-1);
  padding: 64px 28px;
}

/* ---------- FAQ (support page) ---------- */

details.faq {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-1);
  margin-bottom: 12px;
}
details.faq summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 17px;
  padding: 18px 22px;
  border-radius: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
}
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; color: var(--cyan); font-size: 22px; font-weight: 800; }
details.faq[open] summary::after { content: "–"; }
details.faq .faq-body { padding: 0 22px 20px; font-size: 16px; color: var(--ink-dim); }

/* Long-form pages (privacy) */
.prose { max-width: 760px; }
.prose h2 { font-size: 26px; margin-top: 1.6em; }
.prose ul { color: var(--ink-dim); }
.prose li { margin-bottom: 8px; }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 60px;
  font-size: 15px;
  color: var(--ink-faint);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 34px;
  align-items: center;
  justify-content: space-between;
}
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.footer-links a {
  color: var(--ink-dim);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}
.footer-links a:hover { color: var(--ink); text-decoration: underline; }

/* ---------- Motion ---------- */

@media (prefers-reduced-motion: no-preference) {
  .pulse-dot { animation: pulse 2.6s ease-in-out infinite; }
  @keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.18); opacity: 0.85; }
  }
}