/* ============================================================================
   FoodMind AI — Website styles
   Apple Intelligence Halo aesthetic
   Locked 2026-06-05
   ============================================================================ */

/* Design tokens
   ------------------------------------------------------------------------- */
:root {
  /* Colors — match in-app brand */
  --bg:           #FAFAFA;
  --surface:      #FFFFFF;
  --ink:          #1A1A1A;
  --ink-mid:      #4A4A4A;
  --ink-soft:     #8A8A8A;
  --hairline:     #E5E5EA;

  /* Halo gradients (semantic, mirror in-app) */
  --halo-mint:    radial-gradient(circle, #6EE7B7 0%, rgba(110, 231, 183, 0.4) 35%, rgba(110, 231, 183, 0) 70%);
  --halo-green:   radial-gradient(circle, #34D399 0%, rgba(52, 211, 153, 0.4) 35%, rgba(52, 211, 153, 0) 70%);
  --halo-amber:   radial-gradient(circle, #F59E0B 0%, rgba(245, 158, 11, 0.4) 35%, rgba(245, 158, 11, 0) 70%);
  --halo-pink:    radial-gradient(circle, #FBCFE8 0%, rgba(251, 207, 232, 0.6) 35%, rgba(251, 207, 232, 0) 70%);
  --halo-blue:    radial-gradient(circle, #BFDBFE 0%, rgba(191, 219, 254, 0.5) 35%, rgba(191, 219, 254, 0) 70%);
  --halo-stable:  radial-gradient(circle, #FDE68A 0%, rgba(253, 230, 138, 0.5) 35%, rgba(253, 230, 138, 0) 70%);

  /* Typography */
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
               "Segoe UI", system-ui, sans-serif;
  --font-display: var(--font-body);

  /* Spacing scale */
  --gap-1: 4px;
  --gap-2: 8px;
  --gap-3: 12px;
  --gap-4: 16px;
  --gap-5: 24px;
  --gap-6: 32px;
  --gap-7: 48px;
  --gap-8: 64px;
  --gap-9: 96px;
  --gap-10: 128px;

  /* Layout */
  --max-width: 1100px;
  --max-readable: 720px;

  /* Radii */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-pill: 999px;
}

/* Reset + base
   ------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  transition: opacity 160ms ease;
}

a:hover {
  opacity: 0.75;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gap-5);
}

/* Typography
   ------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 700;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  margin-bottom: var(--gap-5);
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: var(--gap-3);
}

h4 {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  margin-bottom: var(--gap-4);
}

p {
  color: var(--ink-mid);
  line-height: 1.65;
}

em {
  font-style: italic;
  color: var(--ink);
}

.eyebrow,
.section-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin-bottom: var(--gap-4);
}

.big-text {
  font-size: 1.15rem;
  line-height: 1.6;
  max-width: var(--max-readable);
}

.small-print {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin-top: var(--gap-4);
}

.small-print a {
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

/* Brand mark (placeholder — replace with PNG when ready)
   ------------------------------------------------------------------------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--ink);
  position: relative;
  flex-shrink: 0;
}

.brand-mark::before {
  /* Viewfinder corners — abstracted */
  content: "";
  position: absolute;
  inset: 6px;
  border: 2px solid var(--bg);
  border-radius: 3px;
}

.brand-name {
  font-size: 1rem;
}

/* Top bar
   ------------------------------------------------------------------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--gap-4) var(--gap-5);
  background: rgba(250, 250, 250, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hairline);
  max-width: var(--max-width);
  margin: 0 auto;
}

/* Buttons
   ------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
  padding: 12px 22px;
  border-radius: var(--r-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, opacity 160ms ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--ink);
  color: var(--bg);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 1;
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--hairline);
  padding: 10px 18px;
  font-size: 0.875rem;
}

.btn-ghost:hover {
  background: var(--surface);
  opacity: 1;
}

.btn-link {
  background: transparent;
  color: var(--ink-mid);
  padding: 12px 0;
  font-weight: 500;
}

.btn-large {
  padding: 18px 36px;
  font-size: 1.05rem;
}

/* Halo system — radial blurred gradients used as accent
   ------------------------------------------------------------------------- */
.halo {
  position: absolute;
  width: 600px;
  height: 600px;
  filter: blur(60px);
  opacity: 0.65;
  pointer-events: none;
  border-radius: 50%;
}

.halo-mint  { background: var(--halo-mint);  }
.halo-green { background: var(--halo-green); }
.halo-amber { background: var(--halo-amber); }
.halo-pink  { background: var(--halo-pink);  }
.halo-blue  { background: var(--halo-blue);  }
.halo-stable{ background: var(--halo-stable);}

/* Sections — generic
   ------------------------------------------------------------------------- */
main > section {
  padding: var(--gap-9) 0;
  position: relative;
  overflow: hidden;
}

/* Hero
   ------------------------------------------------------------------------- */
.hero {
  padding-top: var(--gap-8);
  padding-bottom: var(--gap-10);
  text-align: center;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero .halo-mint {
  top: 60px;
  left: -150px;
  width: 700px;
  height: 700px;
  opacity: 0.7;
}

.hero .halo-amber {
  bottom: -150px;
  right: -200px;
  width: 600px;
  height: 600px;
  opacity: 0.45;
}

.hero h1 {
  margin-bottom: var(--gap-5);
}

.hero .sub {
  font-size: 1.25rem;
  max-width: 580px;
  margin: 0 auto var(--gap-7);
  color: var(--ink-mid);
  line-height: 1.55;
}

.cta-row {
  display: flex;
  gap: var(--gap-4);
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
}

.trust-line {
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: var(--gap-6);
}

/* Features — 3-column grid
   ------------------------------------------------------------------------- */
.features {
  background: var(--surface);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--gap-7);
  margin-top: var(--gap-7);
}

.feature {
  text-align: left;
}

.feature-icon.halo-icon {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin-bottom: var(--gap-4);
  position: relative;
  isolation: isolate;
}

.feature-icon.halo-icon::before {
  content: "";
  position: absolute;
  inset: -25%;
  border-radius: 50%;
  z-index: -1;
  filter: blur(20px);
  opacity: 0.7;
}

.halo-icon-mint::before  { background: var(--halo-mint);  }
.halo-icon-green::before { background: var(--halo-green); }
.halo-icon-amber::before { background: var(--halo-amber); }
.halo-icon-pink::before  { background: var(--halo-pink);  }
.halo-icon-blue::before  { background: var(--halo-blue);  }

/* Food taxonomy — 4 cards
   ------------------------------------------------------------------------- */
.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--gap-5);
  margin-top: var(--gap-7);
}

.tax-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--gap-7) var(--gap-5);
  text-align: center;
  overflow: hidden;
  transition: transform 200ms ease;
}

.tax-card:hover {
  transform: translateY(-4px);
}

.tax-halo {
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
  pointer-events: none;
}

.tax-alive  .tax-halo { background: var(--halo-green);  }
.tax-stable .tax-halo { background: var(--halo-stable); }
.tax-heavy  .tax-halo { background: var(--halo-amber);  }
.tax-empty  .tax-halo { background: var(--halo-pink);   }

.tax-card h3 {
  position: relative;
  font-size: 1.1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: var(--gap-3);
}

.tax-card p {
  position: relative;
  font-size: 0.95rem;
  color: var(--ink-mid);
}

/* Why — comparison
   ------------------------------------------------------------------------- */
.why {
  background: var(--surface);
}

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-5);
  margin-top: var(--gap-7);
}

.compare-col {
  padding: var(--gap-6);
  border-radius: var(--r-lg);
  background: var(--bg);
  border: 1px solid var(--hairline);
}

.compare-us {
  background: var(--ink);
  color: var(--bg);
  border-color: var(--ink);
}

.compare-us h4,
.compare-us ul li {
  color: var(--bg);
}

.compare-us h4 {
  color: rgba(255, 255, 255, 0.6);
}

.compare ul {
  list-style: none;
}

.compare ul li {
  padding: var(--gap-3) 0;
  border-top: 1px solid var(--hairline);
  font-size: 0.95rem;
}

.compare-us ul li {
  border-top-color: rgba(255, 255, 255, 0.15);
}

.compare ul li:first-child {
  border-top: none;
}

/* Safety section
   ------------------------------------------------------------------------- */
.safety {
  text-align: center;
}

.safety .big-text {
  margin: 0 auto;
}

/* Waitlist
   ------------------------------------------------------------------------- */
.waitlist {
  background: var(--surface);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.waitlist .halo-pink {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  opacity: 0.5;
  z-index: 0;
}

.waitlist > .container {
  position: relative;
  z-index: 1;
}

.waitlist .big-text {
  margin: var(--gap-4) auto var(--gap-6);
}

/* Footer
   ------------------------------------------------------------------------- */
.footer {
  background: var(--ink);
  color: var(--bg);
  padding: var(--gap-8) 0 var(--gap-7);
}

.footer .brand-name { color: var(--bg); }

.footer .brand-mark {
  background: var(--bg);
}

.footer .brand-mark::before {
  border-color: var(--ink);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--gap-5);
  align-items: center;
  text-align: center;
}

.footer-nav {
  display: flex;
  gap: var(--gap-6);
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav a {
  color: var(--bg);
  opacity: 0.7;
  font-size: 0.9rem;
}

.footer-nav a:hover {
  opacity: 1;
}

.footer-legal {
  color: rgba(250, 250, 250, 0.4);
  font-size: 0.8rem;
  line-height: 1.6;
  max-width: 580px;
}

/* Legal document pages (privacy, terms, support)
   ------------------------------------------------------------------------- */
.legal-page {
  padding: var(--gap-7) 0 var(--gap-9);
  background: var(--bg);
}

.legal-page .container {
  max-width: var(--max-readable);
}

.legal-page h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--gap-3);
}

.legal-page .updated {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-bottom: var(--gap-7);
}

.legal-page h2 {
  font-size: 1.4rem;
  margin: var(--gap-7) 0 var(--gap-4);
  letter-spacing: -0.01em;
}

.legal-page h3 {
  font-size: 1.05rem;
  margin: var(--gap-5) 0 var(--gap-3);
  font-weight: 600;
}

.legal-page p,
.legal-page li {
  font-size: 1rem;
  margin-bottom: var(--gap-4);
  color: var(--ink-mid);
  line-height: 1.65;
}

.legal-page ul,
.legal-page ol {
  margin-left: var(--gap-5);
  margin-bottom: var(--gap-4);
}

.legal-page li {
  margin-bottom: var(--gap-2);
}

.legal-page strong {
  color: var(--ink);
  font-weight: 600;
}

.legal-page a {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.legal-page table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--gap-4) 0;
  font-size: 0.95rem;
}

.legal-page th,
.legal-page td {
  text-align: left;
  padding: var(--gap-3);
  border-bottom: 1px solid var(--hairline);
  vertical-align: top;
}

.legal-page th {
  color: var(--ink-soft);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.legal-page hr {
  border: none;
  border-top: 1px solid var(--hairline);
  margin: var(--gap-7) 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
  color: var(--ink-mid);
  font-size: 0.95rem;
  margin-bottom: var(--gap-5);
}

.back-link:hover {
  color: var(--ink);
}

/* Responsive
   ------------------------------------------------------------------------- */
@media (max-width: 720px) {
  .compare {
    grid-template-columns: 1fr;
  }

  main > section {
    padding: var(--gap-8) 0;
  }

  .topbar {
    padding: var(--gap-3) var(--gap-4);
  }

  .hero .sub {
    font-size: 1.1rem;
  }

  .feature-grid {
    gap: var(--gap-6);
  }

  .footer-nav {
    gap: var(--gap-4);
  }
}