/* ==========================================================================
   Ingrado design system
   --------------------------------------------------------------------------
   Token-first: every color, space, radius, shadow, and duration used by the
   app is defined here. Components reference tokens only — no arbitrary
   values scattered through views.

   Personality: clean, calm, fresh, trustworthy. Deep teal = trust/primary.
   Green is an ACTION/positive accent — it never by itself means "healthy",
   and red never by itself means "dangerous": every colored signal is always
   paired with a text label.
   ========================================================================== */

:root {
  /* ——— Color tokens ——— */
  --color-primary: #0e7568;        /* deep teal — trust, primary actions */
  --color-primary-deep: #0a5a50;
  --color-primary-soft: #e3f2ef;
  --color-action: #1e9e58;         /* fresh green — positive actions */
  --color-info: #2f6fb2;           /* soft blue — information */
  --color-info-deep: #24568a;
  --color-info-soft: #e9f1f9;
  --color-attention: #b45309;      /* warm amber — attention */
  --color-attention-soft: #fdf1e0;
  --color-critical: #b3403a;       /* muted red — meaningful warnings only */
  --color-critical-soft: #fdeae8;
  --color-success-soft: #e3f4ea;
  --color-premium: #6d5bb8;
  --color-premium-soft: #efecfa;

  --bg: #faf9f6;                   /* warm off-white */
  --surface: #ffffff;
  --surface-2: #f1f0ea;
  --ink: #26302c;                  /* dark charcoal, not pure black */
  --ink-soft: #57635d;
  --ink-faint: #7f8b85;
  --border: #e4e3da;
  --focus: #2563eb;
  --disabled: #c9cec9;

  /* Back-compat aliases (older components reference these) */
  --green: var(--color-action);
  --green-deep: #157347;
  --green-soft: var(--color-success-soft);
  --blue: var(--color-info);
  --blue-deep: var(--color-info-deep);
  --blue-soft: var(--color-info-soft);
  --amber: var(--color-attention);
  --amber-soft: var(--color-attention-soft);
  --red: var(--color-critical);
  --red-soft: var(--color-critical-soft);

  /* ——— Spacing tokens ——— */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 28px;
  --space-7: 40px;

  /* ——— Shape & elevation ——— */
  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 4px rgba(38, 48, 44, 0.06);
  --shadow: 0 2px 14px rgba(38, 48, 44, 0.07);
  --shadow-lg: 0 10px 30px rgba(38, 48, 44, 0.14);

  /* ——— Motion ——— */
  --dur-fast: 140ms;
  --dur: 220ms;
  --ease: cubic-bezier(0.2, 0.8, 0.3, 1);

  /* ——— Typography scale ——— */
  --font: "Avenir Next", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --text-display: 1.9rem;
  --text-title: 1.55rem;
  --text-section: 1.2rem;
  --text-card: 1.02rem;
  --text-body: 1rem;
  --text-support: 0.9rem;
  --text-label: 0.84rem;
  --text-caption: 0.76rem;
  --text-score: 1.7rem;

  --nav-height: 70px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

#app-shell {
  max-width: 520px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
}

main#app {
  padding: var(--space-5) var(--space-4) calc(var(--nav-height) + var(--space-6));
  outline: none;
  animation: fade-in var(--dur) var(--ease);
}

@keyframes fade-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

h1, h2, h3 { line-height: 1.22; margin: 0 0 var(--space-2); letter-spacing: -0.015em; }
h1 { font-size: var(--text-title); }
h2 { font-size: var(--text-section); }
h3 { font-size: var(--text-card); }
p { margin: 0 0 var(--space-3); }
a { color: var(--color-info-deep); }

.muted { color: var(--ink-soft); }
.small { font-size: var(--text-support); }
.center { text-align: center; }

/* ——— Buttons ——— */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font: inherit;
  font-weight: 600;
  font-size: var(--text-body);
  border: none;
  border-radius: 999px;
  padding: 14px 22px;
  min-height: 48px;
  cursor: pointer;
  text-decoration: none;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease),
              background var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
  -webkit-tap-highlight-color: transparent;
}
.btn:active { transform: scale(0.97); }
.btn:focus-visible, a:focus-visible, .card-toggle:focus-visible, .chip:focus-visible,
input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--color-primary-deep); }
.btn-secondary { background: var(--color-primary-soft); color: var(--color-primary-deep); }
.btn-secondary:hover { background: #d3e8e3; }
.btn-ghost { background: transparent; color: var(--ink-soft); border: 1.5px solid var(--border); }
.btn-ghost:hover { background: var(--surface-2); }
.btn-danger { background: var(--color-critical-soft); color: var(--color-critical); }
.btn-block { width: 100%; }
.btn-big { padding: 18px 26px; font-size: 1.08rem; min-height: 58px; }
.btn svg { width: 22px; height: 22px; flex: none; }
.btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* ——— Cards ——— */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: var(--space-4);
  margin-bottom: var(--space-3);
}
.card h2 { margin-bottom: var(--space-3); }

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.row { display: flex; align-items: center; gap: var(--space-3); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); }

/* ——— Hero scan card (home) ——— */
.scan-hero {
  background: linear-gradient(150deg, var(--color-primary) 0%, #14877a 55%, #1f7f9b 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
}
.scan-hero h2 { color: #fff; margin-bottom: var(--space-1); }
.scan-hero p { color: rgba(255, 255, 255, 0.85); }
.scan-hero .btn-hero {
  background: #fff;
  color: var(--color-primary-deep);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
}
.scan-hero .btn-hero:hover { background: #f2faf8; }
.scan-hero .btn-hero-ghost {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

/* Quick actions */
.quick-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-2); margin-bottom: var(--space-4); }
.quick-action {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3) var(--space-2);
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  font-size: var(--text-label);
  font-weight: 600;
  min-height: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  transition: box-shadow var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.quick-action:hover { box-shadow: var(--shadow); transform: translateY(-1px); }
.quick-action .qa-emoji { font-size: 1.35rem; }

/* ——— Badges ——— */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 11px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
}
.badge-green { background: var(--color-success-soft); color: var(--green-deep); }
.badge-blue { background: var(--color-info-soft); color: var(--color-info-deep); }
.badge-amber { background: var(--color-attention-soft); color: var(--color-attention); }
.badge-red { background: var(--color-critical-soft); color: var(--color-critical); }
.badge-gray { background: var(--surface-2); color: var(--ink-soft); }
.badge-premium { background: var(--color-premium-soft); color: var(--color-premium); }

/* ——— Filter chips ——— */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: inherit;
  font-size: var(--text-label);
  font-weight: 600;
  padding: 7px 14px;
  min-height: 36px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.chip[aria-pressed="true"], .chip.chip-on {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ——— Score ring ——— */
.score-ring {
  width: 92px; height: 92px;
  border-radius: 50%;
  display: grid; place-items: center;
  flex: none;
}
.score-ring .score-num { font-size: var(--text-score); font-weight: 700; line-height: 1; }
.score-ring .score-max { font-size: 0.7rem; color: var(--ink-soft); }
.score-inner {
  width: 74px; height: 74px; border-radius: 50%;
  background: var(--surface);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}

/* ——— Headline summary ——— */
.headline-card {
  border-left: 5px solid var(--color-primary);
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0;
}
.headline-card .headline { font-weight: 700; font-size: var(--text-card); margin: 0; }

/* Segmented control (Quick / Full report views) */
.seg {
  display: flex;
  background: var(--surface-2);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
  margin: var(--space-3) 0;
}
.seg button {
  flex: 1;
  font: inherit;
  font-weight: 600;
  font-size: var(--text-label);
  border: none;
  background: transparent;
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 9px 10px;
  min-height: 40px;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.seg button[aria-pressed="true"] {
  background: var(--surface);
  color: var(--ink);
  box-shadow: var(--shadow-sm);
}

/* ——— Bottom navigation ——— */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 520px;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  align-items: stretch;
  z-index: 50;
  padding-bottom: env(safe-area-inset-bottom);
}
.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  text-decoration: none;
  color: var(--ink-faint);
  font-size: 0.68rem;
  font-weight: 600;
  min-width: 48px;
}
.nav-item svg { width: 24px; height: 24px; }
.nav-item.active { color: var(--color-primary-deep); }
.nav-scan { position: relative; color: var(--ink-faint); }
.nav-scan-circle {
  width: 54px; height: 54px;
  margin-top: -28px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--color-primary), #1f7f9b);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-lg);
  border: 3px solid var(--bg);
  transition: transform var(--dur-fast) var(--ease);
}
.nav-scan:active .nav-scan-circle { transform: scale(0.94); }
.nav-scan-circle svg { width: 24px; height: 24px; }
.nav-scan.active span:last-child { color: var(--color-primary-deep); }

/* ——— Forms ——— */
label.field-label { display: block; font-weight: 600; font-size: var(--text-support); margin: 0 0 6px; }
input[type="text"], input[type="email"], input[type="password"], input[type="search"], textarea, select {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  min-height: 48px;
}
textarea { min-height: 110px; resize: vertical; }

.check-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-1);
  border-bottom: 1px solid var(--surface-2);
  cursor: pointer;
  min-height: 48px;
}
.check-row:last-child { border-bottom: none; }
.check-row input[type="checkbox"] {
  width: 22px; height: 22px;
  accent-color: var(--color-primary);
  flex: none;
}

/* ——— Expandable ingredient cards ——— */
.ing-card {
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  background: var(--surface);
}
.card-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font: inherit;
  font-weight: 600;
  background: none;
  border: none;
  padding: 14px;
  cursor: pointer;
  text-align: left;
  min-height: 48px;
}
.card-toggle .chev { transition: transform var(--dur) var(--ease); flex: none; width: 18px; height: 18px; color: var(--ink-faint); }
.ing-card[data-open="true"] .chev { transform: rotate(180deg); }
.ing-body { padding: 0 14px 14px; display: none; }
.ing-card[data-open="true"] .ing-body { display: block; animation: fade-in var(--dur) var(--ease); }
.ing-body dt { font-weight: 600; font-size: 0.82rem; color: var(--ink-soft); margin-top: 10px; }
.ing-body dd { margin: 2px 0 0; font-size: 0.92rem; }

/* ——— Nutrition grid ——— */
.nutri-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.nutri-cell { background: var(--surface-2); border-radius: var(--radius-sm); padding: var(--space-3); }
.nutri-cell .nutri-name { font-size: 0.78rem; font-weight: 600; color: var(--ink-soft); }
.nutri-cell .nutri-value { font-size: 1.15rem; font-weight: 700; margin: 2px 0 6px; }

/* ——— Landing / hero ——— */
.hero { text-align: center; padding: 34px 8px 26px; }
.logo-mark {
  width: 64px; height: 64px;
  border-radius: 20px;
  background: linear-gradient(140deg, var(--color-primary), #1f7f9b);
  display: inline-grid;
  place-items: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
  margin-bottom: var(--space-3);
}
.logo-mark svg { width: 34px; height: 34px; }
.hero h1 { font-size: var(--text-display); }
.tagline { color: var(--color-primary-deep); font-weight: 600; }
.step-num {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary-deep);
  font-weight: 700;
  display: grid;
  place-items: center;
  flex: none;
}

/* ——— Scan page ——— */
.scan-option {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  font: inherit;
  text-align: left;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-4);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
  min-height: 72px;
}
.scan-option:hover { border-color: var(--color-primary); box-shadow: var(--shadow); }
.scan-option .opt-icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  flex: none;
}
.scan-option .opt-icon svg { width: 24px; height: 24px; }

.preview-wrap { position: relative; border-radius: var(--radius); overflow: hidden; background: #101b17; }
.preview-wrap canvas, .preview-wrap img { display: block; width: 100%; height: auto; touch-action: none; }
.crop-hint {
  position: absolute; inset: auto 0 0 0;
  background: rgba(16, 27, 23, 0.72);
  color: #fff;
  font-size: 0.8rem;
  padding: 8px 12px;
  text-align: center;
}

/* ——— Analysis stages (progressive loading) ——— */
.stage-list { list-style: none; margin: var(--space-3) 0 0; padding: 0; text-align: left; }
.stage-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  color: var(--ink-faint);
  font-size: var(--text-support);
  transition: color var(--dur) var(--ease);
}
.stage-list li .stage-dot {
  width: 20px; height: 20px; flex: none;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: grid; place-items: center;
  font-size: 0.7rem;
  background: var(--surface);
}
.stage-list li[data-state="active"] { color: var(--ink); font-weight: 600; }
.stage-list li[data-state="active"] .stage-dot { border-color: var(--color-primary); }
.stage-list li[data-state="done"] { color: var(--ink-soft); }
.stage-list li[data-state="done"] .stage-dot { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* Skeletons */
.skeleton {
  border-radius: var(--radius-sm);
  background: linear-gradient(90deg, var(--surface-2) 25%, #e8e7e0 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ——— History list ——— */
.scan-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: var(--space-3);
  margin-bottom: 10px;
  text-decoration: none;
  color: inherit;
}
.scan-thumb {
  width: 52px; height: 52px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  flex: none;
  overflow: hidden;
}
.scan-thumb img { width: 100%; height: 100%; object-fit: cover; }
.scan-item .scan-meta { flex: 1; min-width: 0; }
.scan-item .scan-title { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
  min-width: 44px; min-height: 44px;
  display: grid;
  place-items: center;
  color: var(--ink-faint);
  border-radius: 50%;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn svg { width: 22px; height: 22px; }
.icon-btn.fav-on { color: #d3455b; }

/* ——— Compare table ——— */
.compare-table { width: 100%; border-collapse: collapse; font-size: var(--text-support); }
.compare-table th, .compare-table td { padding: 10px 8px; text-align: left; border-bottom: 1px solid var(--surface-2); vertical-align: top; }
.compare-table th { font-size: 0.78rem; color: var(--ink-soft); }
.compare-better { font-weight: 700; color: var(--green-deep); }

/* ——— Toast ——— */
#toast-region {
  position: fixed;
  bottom: calc(var(--nav-height) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  width: min(92vw, 440px);
  pointer-events: none;
}
.toast {
  background: var(--ink);
  color: #fff;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: 8px;
  box-shadow: var(--shadow-lg);
  animation: fade-in var(--dur) var(--ease);
  font-size: 0.92rem;
}
.toast-error { background: var(--color-critical); }

/* ——— Progress / spinner ——— */
.progress-bar { height: 8px; background: var(--surface-2); border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--color-primary), var(--color-info)); border-radius: 999px; transition: width var(--dur) var(--ease); }
.spinner {
  width: 26px; height: 26px;
  border: 3px solid var(--color-primary-soft);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ——— Pricing ——— */
.plan-card { border: 2px solid var(--border); border-radius: var(--radius); padding: var(--space-4); background: var(--surface); }
.plan-card.plan-plus { border-color: var(--color-primary); position: relative; }
.plan-price { font-size: 1.9rem; font-weight: 700; }
.plan-card ul { padding-left: 20px; margin: 10px 0; }
.plan-card li { margin-bottom: 6px; }

.disclaimer {
  font-size: var(--text-caption);
  color: var(--ink-soft);
  background: var(--surface-2);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
}

.empty-state { text-align: center; padding: var(--space-7) var(--space-4); color: var(--ink-soft); }
.empty-state .empty-emoji { font-size: 2.6rem; display: block; margin-bottom: 10px; }

.demo-tag { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-info-deep); background: var(--color-info-soft); border-radius: 6px; padding: 2px 7px; }

@media (min-width: 700px) {
  body { background: #efeee8; }
  #app-shell { background: var(--bg); box-shadow: 0 0 40px rgba(38, 48, 44, 0.08); min-height: 100vh; }
}