/* =========================================================================
   Vialed marketing site — single stylesheet.
   Design system mirrors the iOS app's dark mode: pure black background,
   elevated surfaces, AccentColor purple, SF Pro, generous radii.
   ========================================================================= */

:root {
  /* Surfaces */
  --bg-primary: #000000;
  --bg-elevated: #1C1C1E;
  --bg-elevated-2: #2C2C2E;

  /* Brand */
  --accent: #534AB7;
  --accent-bright: #8B6BFF;

  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);

  /* Lines */
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);

  /* Radii — match iOS app */
  --radius-card: 14px;
  --radius-chip: 8px;
  --radius-modal: 12px;

  /* Spacing scale (4, 8, 16, 24, 32, 48, 64, 96) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 16px;
  --s-4: 24px;
  --s-5: 32px;
  --s-6: 48px;
  --s-7: 64px;
  --s-8: 96px;

  /* Layout */
  --max-w: 1200px;
  --gutter: 24px;
}

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

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

html {
  background: var(--bg-primary);
  color-scheme: dark;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", system-ui, sans-serif;
  font-weight: 400;
  font-size: 17px;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; height: auto; }

a {
  color: var(--accent-bright);
  text-decoration: none;
  transition: color 120ms ease;
}
a:hover { color: var(--text-primary); }

h1, h2, h3, h4 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", system-ui, sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 var(--s-3) 0;
  color: var(--text-primary);
}
h1 { font-size: clamp(36px, 5.5vw, 64px); line-height: 1.05; letter-spacing: -0.03em; }
h2 { font-size: clamp(28px, 3.6vw, 42px); line-height: 1.1; }
h3 { font-size: clamp(20px, 2vw, 24px); line-height: 1.25; font-weight: 600; }

p { margin: 0 0 var(--s-3) 0; color: var(--text-secondary); }
p:last-child { margin-bottom: 0; }

/* -------------------------------------------------------------------------
   Layout primitives
   ------------------------------------------------------------------------- */

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

section {
  padding-top: var(--s-8);
  padding-bottom: var(--s-8);
  position: relative;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: var(--s-3);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--s-3);
  padding-bottom: var(--s-3);
}

.site-header .brand {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.site-header .brand img { width: 28px; height: 28px; border-radius: 6px; }
.site-header nav a {
  color: var(--text-secondary);
  margin-left: var(--s-4);
  font-size: 15px;
  font-weight: 500;
}
.site-header nav a:hover { color: var(--text-primary); }

/* -------------------------------------------------------------------------
   Buttons / App Store badge
   ------------------------------------------------------------------------- */

.app-store-badge {
  display: inline-block;
  /* The badge SVG already has its own black background per Apple guidelines.
     We just give it a stable height; width auto-scales. */
  height: 56px;
  transition: transform 150ms ease, filter 150ms ease;
}
.app-store-badge:hover {
  transform: translateY(-1px);
  filter: drop-shadow(0 0 12px rgba(139, 107, 255, 0.35));
}
.app-store-badge img, .app-store-badge svg { height: 100%; width: auto; display: block; }

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

.hero {
  padding-top: var(--s-8);
  padding-bottom: var(--s-8);
  overflow: hidden; /* contain the glow */
}

/* Soft purple glow behind hero — echoes the app icon's neon V */
.hero::before {
  content: "";
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1100px, 110%);
  height: 700px;
  background: radial-gradient(ellipse at center,
              rgba(139, 107, 255, 0.28) 0%,
              rgba(83, 74, 183, 0.12) 30%,
              transparent 65%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-7);
  align-items: center;
}

.hero-copy h1 { margin-bottom: var(--s-4); }
.hero-copy .subhead {
  font-size: clamp(17px, 1.6vw, 20px);
  color: var(--text-secondary);
  max-width: 56ch;
  margin-bottom: var(--s-6);
}

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

/* -------------------------------------------------------------------------
   Phone-shaped screenshot placeholder
   Aspect ratio 9:19.5 (iPhone). Dimensions hold steady so swapping a real
   PNG in later doesn't shift layout.
   ------------------------------------------------------------------------- */

.phone-shot {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 9 / 19.5;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 36px; /* iPhone-ish radius for the mockup */
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
  padding: var(--s-4);
  position: relative;
  overflow: hidden;
}

.phone-shot::after {
  /* subtle inner highlight, gives the placeholder a hint of glass */
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, transparent 30%);
  pointer-events: none;
}

.hero .phone-shot { max-width: 300px; }

/* -------------------------------------------------------------------------
   Problem / Solution section
   ------------------------------------------------------------------------- */

.prose-section .container { max-width: 760px; }
.prose-section h2 { margin-bottom: var(--s-5); }
.prose-section p {
  font-size: 18px;
  margin-bottom: var(--s-4);
}

/* -------------------------------------------------------------------------
   Features — alternating image/text rows
   ------------------------------------------------------------------------- */

.features { padding-bottom: var(--s-7); }

.feature {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-6);
  align-items: center;
  padding: var(--s-7) 0;
  border-top: 1px solid var(--border);
}
.feature:first-child { border-top: none; padding-top: var(--s-5); }

.feature-copy .feature-number {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent-bright);
  text-transform: uppercase;
  margin-bottom: var(--s-2);
}
.feature-copy h3 {
  font-size: clamp(24px, 2.6vw, 30px);
  margin-bottom: var(--s-3);
  letter-spacing: -0.02em;
}
.feature-copy p {
  font-size: 17px;
  max-width: 52ch;
}

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

/* -------------------------------------------------------------------------
   Pricing
   ------------------------------------------------------------------------- */

.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
  max-width: 880px;
  margin: var(--s-6) auto 0;
}

.price-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--s-6);
  position: relative;
  display: flex;
  flex-direction: column;
}

.price-card.featured {
  border-color: rgba(139, 107, 255, 0.5);
  background: linear-gradient(180deg, rgba(139, 107, 255, 0.06) 0%, var(--bg-elevated) 100%);
  box-shadow: 0 0 0 1px rgba(139, 107, 255, 0.15), 0 20px 60px -20px rgba(139, 107, 255, 0.25);
}

.price-card .recommended-pill {
  position: absolute;
  top: -12px;
  left: var(--s-6);
  background: var(--accent);
  color: white;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 12px;
  border-radius: 999px;
}

.price-card h3 {
  font-size: 22px;
  margin-bottom: var(--s-2);
}

.price-card .price {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: var(--s-2) 0 var(--s-1);
  color: var(--text-primary);
}
.price-card .price small {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
}

.price-card .price-sub {
  color: var(--text-tertiary);
  font-size: 14px;
  margin-bottom: var(--s-5);
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.price-card li {
  display: flex;
  align-items: flex-start;
  gap: var(--s-2);
  color: var(--text-secondary);
  font-size: 16px;
}
.price-card li::before {
  content: "";
  flex: 0 0 18px;
  height: 18px;
  margin-top: 4px;
  background: var(--accent-bright);
  -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M3 8.5 L6.5 12 L13 4.5' stroke='black' stroke-width='2.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>") center / contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path d='M3 8.5 L6.5 12 L13 4.5' stroke='black' stroke-width='2.2' fill='none' stroke-linecap='round' stroke-linejoin='round'/></svg>") center / contain no-repeat;
}

/* -------------------------------------------------------------------------
   FAQ
   ------------------------------------------------------------------------- */

.faq-list {
  max-width: 800px;
  margin: var(--s-6) auto 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}
.faq-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: var(--s-5);
}
.faq-item h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--s-2);
}
.faq-item p {
  font-size: 16px;
  margin: 0;
}

/* -------------------------------------------------------------------------
   Final CTA
   ------------------------------------------------------------------------- */

.final-cta {
  text-align: center;
  padding-top: var(--s-8);
  padding-bottom: var(--s-8);
  position: relative;
  overflow: hidden;
}
.final-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center, rgba(139, 107, 255, 0.18) 0%, transparent 60%);
  filter: blur(30px);
  pointer-events: none;
  z-index: 0;
}
.final-cta .container { position: relative; z-index: 1; }
.final-cta h2 { margin-bottom: var(--s-5); }

/* -------------------------------------------------------------------------
   Section headings (centered variants)
   ------------------------------------------------------------------------- */

.section-heading {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.section-heading + .pricing-grid,
.section-heading + .faq-list { margin-top: var(--s-6); }

/* -------------------------------------------------------------------------
   Footer + disclaimer
   ------------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--s-6) 0 var(--s-5);
  margin-top: var(--s-7);
}
.site-footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
  align-items: flex-start;
  justify-content: space-between;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-brand img { width: 24px; height: 24px; border-radius: 5px; }

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4);
  font-size: 14px;
}
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--text-primary); }
.footer-links .sep { color: var(--text-tertiary); }

.footer-copyright {
  border-top: 1px solid var(--border);
  padding: var(--s-3) 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-tertiary);
}

.medical-disclaimer {
  padding: var(--s-4) 0 var(--s-6);
  text-align: center;
}
.medical-disclaimer p {
  max-width: 920px;
  margin: 0 auto;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-tertiary);
}

/* -------------------------------------------------------------------------
   Stub pages (privacy / terms / support)
   ------------------------------------------------------------------------- */

.stub-page {
  min-height: 50vh;
  padding-top: var(--s-8);
  padding-bottom: var(--s-8);
}
.stub-page h1 { margin-bottom: var(--s-4); }
.stub-page .stub-body {
  color: var(--text-secondary);
  font-size: 17px;
  max-width: 640px;
}
.stub-page .contact-list {
  list-style: none;
  padding: 0;
  margin: var(--s-4) 0 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  font-size: 17px;
}

/* -------------------------------------------------------------------------
   Legal documents (disclaimer / privacy / terms long-form pages)
   ------------------------------------------------------------------------- */

.legal-doc {
  padding-top: var(--s-7);
  padding-bottom: var(--s-8);
}
.legal-doc .container { max-width: 760px; }

.legal-doc h1 {
  font-size: clamp(32px, 4vw, 44px);
  margin-top: var(--s-3);
  margin-bottom: var(--s-3);
}
.legal-doc h2 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-bright);
  margin-top: var(--s-6);
  margin-bottom: var(--s-3);
}
.legal-doc h3 {
  font-size: 18px;
  font-weight: 600;
  margin-top: var(--s-5);
  margin-bottom: var(--s-2);
}
.legal-doc p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-secondary);
  margin-bottom: var(--s-3);
}
.legal-doc .lede {
  font-size: 18px;
  color: var(--text-primary);
  margin-top: var(--s-3);
  margin-bottom: var(--s-5);
}
.legal-doc ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--s-3) 0;
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
}
.legal-doc li {
  position: relative;
  padding-left: var(--s-3);
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.6;
}
.legal-doc li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--text-tertiary);
}
.legal-doc hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--s-6) 0 var(--s-4);
}
.legal-doc .legal-meta {
  font-size: 13px;
  color: var(--text-tertiary);
  margin: 0 0 var(--s-1) 0;
}
.legal-doc .legal-meta + .legal-meta { margin-bottom: var(--s-5); }

.legal-doc .draft-banner {
  background: rgba(139, 107, 255, 0.08);
  border: 1px solid rgba(139, 107, 255, 0.3);
  border-radius: var(--radius-card);
  padding: var(--s-3) var(--s-4);
  font-size: 14px;
  color: var(--text-secondary);
  margin: var(--s-3) 0 var(--s-5);
}
.legal-doc .draft-banner strong { color: var(--accent-bright); }

.back-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 0 0 var(--s-4) 0;
}
.back-link:hover { color: var(--text-primary); }
.legal-doc .back-link + h1 { margin-top: 0; }
.legal-doc .back-link.bottom { margin-top: var(--s-5); margin-bottom: 0; }

/* -------------------------------------------------------------------------
   Responsive — tablet (640+) and desktop (1024+)
   ------------------------------------------------------------------------- */

@media (min-width: 640px) {
  body { font-size: 18px; }

  .hero .container { gap: var(--s-8); }
  .hero-copy .subhead { font-size: 20px; }

  .pricing-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-5);
  }

  .site-footer .container {
    flex-direction: row;
    align-items: center;
  }
}

@media (min-width: 1024px) {
  :root { --gutter: 32px; }

  .hero .container {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--s-8);
  }
  .hero .phone-shot { max-width: 340px; }

  .feature {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-8);
    padding: var(--s-8) 0;
  }
  /* Alternate image side on every other feature */
  .feature.reverse .feature-visual { order: -1; }

  .feature .phone-shot { max-width: 300px; }
}

/* -------------------------------------------------------------------------
   Reduced motion respect
   ------------------------------------------------------------------------- */

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

/* -------------------------------------------------------------------------
   Focus states — visible for keyboard nav
   ------------------------------------------------------------------------- */

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
  border-radius: 4px;
}