:root {
  --bg: #f6f8f4;
  --panel: #ffffff;
  --ink: #1c2a21;
  --muted: #67756b;
  --accent: #2e7d4f;
  --accent-dark: #1c5535;
  --accent-deep: #123823;
  --border: #e2e9e3;
  --vegan: #2e7d4f;
  --vegetarian: #7cb342;
  --grey: #f0a513;
  --nonveg: #c62828;
  --radius: 1rem;
  --shadow: 0 0.375rem 1.5rem rgba(18, 56, 35, 0.08);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 4.5rem; }

body {
  zoom: 0.9;
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  overflow-x: hidden;
}

/* ---------- Top navigation ---------- */
/* Transparent over the hero; turns solid once the page scrolls (.scrolled
   added by app.js) or when the mobile menu is open. */
.topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 2rem;
  background: linear-gradient(180deg, rgba(8, 28, 17, 0.55), rgba(8, 28, 17, 0));
  transition: background 0.25s ease, box-shadow 0.25s ease, padding 0.25s ease;
}
.topnav.scrolled, .topnav.menu-open {
  background: rgba(12, 38, 23, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 0.125rem 1.125rem rgba(0, 0, 0, 0.25);
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.site-logo { line-height: 0; padding: 0.125rem; }

.topnav .logo {
  height: 2.5rem;
  width: auto;
  display: inline-block;
  vertical-align: middle;
}
.nav-right { display: flex; align-items: center; gap: 0.625rem; order: 3; }
.lang-select {
  width: auto;
  appearance: none;
  -webkit-appearance: none;
  background-color: rgba(255, 255, 255, 0.14);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='white' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5625rem center;
  border: 1px solid rgba(255, 255, 255, 0.4);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.375rem 1.375rem 0.375rem 0.625rem;
  border-radius: 999px;
  cursor: pointer;
  max-width: 8.75rem;
}
.lang-select:focus { border-color: #fff; box-shadow: none; }
.lang-select option { color: var(--ink); background: #fff; }
.topnav .links { display: flex; gap: clamp(0.875rem, 3vw, 2.125rem); order: 2; }
.topnav .links a {
  color: #e3eee6;
  text-decoration: none;
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.375rem 0.125rem;
  border-bottom: 2px solid transparent;
  transition: color 0.12s ease, border-color 0.12s ease;
}
.topnav .links a:hover { color: #fff; border-bottom-color: var(--vegetarian); }

#nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.45rem;
  line-height: 1;
  padding: 0.375rem 0.625rem;
  cursor: pointer;
  border-radius: 0.5rem;
}
#nav-toggle:hover { background: rgba(255, 255, 255, 0.12); transform: none; }

.ingredients { padding: 0.625rem 0.75rem; }
.nutrition { padding: 0.625rem 0.75rem; }
.nutrition-fields { padding: 0.875rem 1rem; }

@media (max-width: 720px) {
  #nav-toggle { display: block; }
  .topnav .links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 32, 19, 0.97);
    backdrop-filter: blur(10px);
    box-shadow: 0 0.875rem 1.5rem rgba(0, 0, 0, 0.3);
    padding: 0.375rem 0 0.75rem;
  }
  .topnav.menu-open .links { display: flex; }
  .topnav .links a {
    padding: 0.875rem clamp(1rem, 5vw, 3.5rem);
    border-bottom: none;
    font-size: 0.82rem;
  }
  .topnav .links a:hover { background: rgba(255, 255, 255, 0.08); }
}

/* ---------- Hero ---------- */
.hero {
  background: url("images/hero.jpg") center 60% / cover no-repeat;
  min-height: 25rem;
  display: flex;
}
.hero-overlay {
  flex: 1;
  background: linear-gradient(100deg, rgba(10, 36, 21, 0.92) 0%, rgba(16, 56, 33, 0.72) 45%, rgba(18, 56, 35, 0.25) 100%);
  display: flex;
  flex-direction: column;
  /* top padding clears the fixed transparent navbar */
  padding: 4.5rem clamp(1.25rem, 6vw, 4.5rem) 3.5rem;
}
.hero-copy { margin: 2rem; max-width: 40rem; }
.hero-copy h1 {
  white-space: pre-line;
  font-family: var(--font-display);
  color: #fff;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.08;
  margin: 0 0 1rem;
  text-shadow: 0 0.125rem 1.125rem rgba(0, 0, 0, 0.35);
}
.hero-copy p {
  color: #e4efe7;
  font-size: clamp(0.95rem, 1.6vw, 1.12rem);
  max-width: 32.5rem;
  margin: 0 0 1.625rem;
}
.cta {
  display: inline-block;
  background: #fff;
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration: none;
  padding: 0.8125rem 1.625rem;
  border-radius: 999px;
  box-shadow: 0 0.25rem 1.125rem rgba(0, 0, 0, 0.25);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.3); }

/* ---------- Steps strip ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: 1180px;
  margin: -2.375rem auto 0.5rem;
  padding: 0 1.5rem;
  position: relative;
}
.step {
  background: var(--panel);
  border: 1px solid var(--border);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem 1.375rem 1.375rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.875rem;
  position: relative;
}
.step:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1rem;
  font-weight: 700;
  opacity: 0.35;
  pointer-events: none;
  z-index: 1;
}
.step-num {
  position: absolute;
  top: 0.75rem;
  left: 1rem;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  opacity: 0.45;
}
.step-icon {
  width: 3.75rem;
  height: 3.75rem;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}
.step h3 { margin: 0 0 0.3125rem; font-size: 0.95rem; }
.step p { margin: 0; font-size: 0.84rem; color: var(--muted); line-height: 1.5; }

/* ---------- Layout ---------- */
main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 1.375rem;
  padding: 1.375rem 1.5rem;
  max-width: 1180px;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.625rem;
  box-shadow: var(--shadow);
}
.panel h2 {
  margin: 0 0 0.875rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  display: flex;
  align-items: center;
  gap: 0.625rem;
}
.num {
  background: var(--accent);
  color: #fff;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 700;
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.panel h3 { font-size: 0.95rem; margin: 1.375rem 0 0.5rem; }
.hint { color: var(--muted); font-weight: 400; font-size: 0.78rem; }

/* ---------- Upload / scan zone ---------- */
#drop-zone {
  border: 2px dashed var(--border);
  border-radius: 0.75rem;
  padding: 1.125rem 1rem;
  text-align: center;
  background: #fafcfa;
  transition: border-color 0.15s ease, background 0.15s ease;
  margin-bottom: 0.375rem;
}
#drop-zone.dragover { border-color: var(--accent); background: #eef7f0; }
.dz-icon { font-size: 1.8rem; display: block; }
#drop-zone p { margin: 0.375rem 0 0.75rem; font-size: 0.88rem; }
.dz-actions { display: flex; justify-content: center; gap: 0.625rem; flex-wrap: wrap; }
.dz-actions button { display: inline-flex; align-items: center; gap: 0.4em; }

#ocr-status {
  display: flex;
  gap: 0.875rem;
  align-items: center;
  margin: 1rem;
  padding: 1rem;
  background: #f1f7f2;
  border-radius: 0.75rem;
  flex-wrap: nowrap;
  flex-direction: column;
  width: calc(100% - 2rem);
}
.ocr-thumb-col { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
#ocr-thumb { width: 10rem; height: 10rem; object-fit: cover; border-radius: 0.5rem; border: 1px solid var(--border); }
#ocr-reupload-btn {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.08);
  border: none;
  cursor: pointer;
  font-size: 1rem; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  color: var(--ink);
  opacity: 0.65;
  transition: background 0.15s, opacity 0.15s, transform 0.15s;
  box-shadow: none;
}
#ocr-reupload-btn:hover { background: rgba(0, 0, 0, 0.15); opacity: 1; transform: none; }
.ocr-progress { flex: 1; width: 100%; min-width: 0; }
.ocr-stage-row { display: flex; align-items: center; gap: 0.4375rem; margin-bottom: 0.5rem; }
.ocr-sparkle {
  display: inline-block;
  color: var(--accent);
  font-size: 0.95rem;
  line-height: 1;
  flex-shrink: 0;
  animation: sparkle-breathe 2s ease-in-out infinite;
}
.ocr-sparkle.done { animation: none; opacity: 0.55; }
@keyframes sparkle-breathe {
  0%, 100% { transform: scale(1) rotate(0deg); opacity: 0.55; }
  50%       { transform: scale(1.45) rotate(20deg); opacity: 1; }
}
#ocr-stage { font-size: 0.84rem; font-weight: 600; transition: opacity 0.22s ease; }
#ocr-stage.fading { opacity: 0; }
#ocr-bar { width: 100%; height: 0.625rem; accent-color: var(--accent); }

#ocr-error {
  margin: 0.75rem 0 0.25rem;
  padding: 0.75rem 1rem;
  background: #fdf2f2;
  border: 1px solid #f1c5c5;
  border-left: 4px solid var(--nonveg);
  border-radius: 0.625rem;
  font-size: 0.88rem;
  color: #7a1f1f;
}

/* ---------- Form ---------- */
label { display: block; font-size: 0.86rem; font-weight: 600; margin: 1.25rem 0 0.4375rem; }
textarea, input[type="number"], select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.625rem;
  font: inherit;
  font-size: 0.9rem;
  background: #fafcfa;
  transition: border-color 0.12s ease, box-shadow 0.12s ease;
}
textarea { resize: vertical; }
textarea:focus, input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 0.1875rem rgba(46, 125, 79, 0.18);
}

fieldset { border: 1px solid var(--border); border-radius: 0.75rem; margin-top: 1.625rem; padding: 0.875rem 1rem 1.25rem; }
legend { font-size: 0.84rem; font-weight: 600; padding: 0 0.5rem; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.125rem 1rem; }
.grid label { margin: 0.75rem 0 0.25rem; font-weight: 500; font-size: 0.82rem; }
.grid input, .grid select { margin-top: 0.25rem; }
.unit-row { display: flex; gap: 0.375rem; }
.unit-row select { width: auto; font-size: 0.78rem; flex-shrink: 0; }

.actions { margin-top: 1.25rem; }
button {
  font: inherit;
  font-weight: 600;
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
  transition: background 0.12s ease, transform 0.12s ease;
}
#analyze-btn {
  width: 100%;
  font-size: 1rem;
  box-shadow: 0 0.25rem 0.875rem rgba(46, 125, 79, 0.35);
  padding: 0.875rem 1.5rem;
  border: none;
}
#analyze-btn:hover { background: var(--accent-dark); transform: translateY(-1px); color: white; }

button.secondary {
  background: #eef4ef;
  color: var(--accent-dark);
  border: 1px solid var(--border);
  font-weight: 500;
  padding: 0.5rem 1rem;
  font-size: 0.84rem;
  box-shadow: none;
}
button.secondary:hover { background: #e0ebe2; transform: none; }
button.small { padding: 0.125rem 0.75rem; font-size: 0.72rem; }
#parse-nutrition { margin: 1rem 0; }
.demos { margin-top: 0.875rem; display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; }

/* ---------- Nutrition details toggle ---------- */
#nutrition-details { margin-top: 0.5rem; }
#nutrition-details > summary {
  cursor: pointer;
  list-style: none;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-dark);
  padding: 0.5rem 0;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 0.4em;
}
#nutrition-details > summary::-webkit-details-marker { display: none; }
#nutrition-details > summary::before { content: "▶ "; font-size: 0.7em; transition: transform 0.15s; }
#nutrition-details[open] > summary::before { content: "▼ "; }

/* ---------- Results ---------- */
#empty-state { text-align: center; padding: 0.75rem 0.5rem 0.25rem; }
#empty-state img {
  width: 100%;
  max-height: 17.5rem;
  object-fit: cover;
  border-radius: 0.75rem;
}
#empty-state p { color: var(--muted); font-size: 0.92rem; }
.hidden { display: none !important; }

/* OCR degradation flag: shown when scan confidence < 85% or segments were unreadable */
.ocr-warning {
  margin: 0 0 1rem;
  padding: 0.75rem 1rem;
  background: #fff6e8;
  border: 1px solid #f2d39b;
  border-left: 4px solid #e65100;
  border-radius: 0.625rem;
  font-size: 0.88rem;
  color: #6b3c00;
}
.ocr-warning strong { display: block; margin-bottom: 0.25rem; }

.result-top { display: flex; align-items: center; justify-content: space-between; gap: 2rem; flex-wrap: wrap; margin-bottom: 0.875rem; }

.badge {
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.625rem 1.375rem;
  border-radius: 999px;
  color: #fff;
  background: var(--muted);
  box-shadow: 0 0.1875rem 0.75rem rgba(0, 0, 0, 0.15);
}
.badge.vegan { background: var(--vegan); }
.badge.vegetarian { background: var(--vegetarian); }
.badge.grey { background: var(--grey); color: #3c2c00; }
.badge.nonveg { background: var(--nonveg); }

.history { margin-bottom: 1rem; }
.history-chips { display: flex; flex-wrap: wrap; gap: 0.375rem; margin-top: 0.375rem; }
.history-item {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  color: #fff;
  background: var(--muted);
}
.history-item:hover { opacity: 0.85; }
.history-item.vegan { background: var(--vegan); }
.history-item.vegetarian { background: var(--vegetarian); }
.history-item.grey { background: var(--grey); color: #3c2c00; }
.history-item.nonveg { background: var(--nonveg); }
.history-chip {
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border: none;
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.history-remove {
  font-size: 0.7rem;
  line-height: 1;
  border: none;
  padding: 0.5rem;
  background: transparent;
  color: inherit;
  cursor: pointer;
}
.history-remove:hover { background-color: #7a1f1f;}

.confidence-bar {
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  letter-spacing: 0.01em;
  margin-bottom: 1.5rem;
}
.conf-high   { background: #e8f5e9; color: #2e7d4f; }
.conf-medium { background: #fff8e1; color: #7a5a00; }
.conf-low    { background: #fce4ec; color: #b71c1c; }

.assessment-note {
  font-size: 0.8rem;
  color: #555;
  background: #f0f4ff;
  border: 1px solid #c5d0f0;
  border-radius: 0.375rem;
  padding: 0.5rem 0.75rem;
  margin-top: 1rem;
}
.assessment-note::before {
  content: "ℹ️  ";
}

.nutri-block { text-align: center; }
.nutri { display: flex; gap: 0.1875rem; }
.nutri span {
  width: 2.375rem;
  height: 2.625rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: #fff;
  opacity: 0.32;
  border-radius: 0.5rem;
  font-size: 1.05rem;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nutri span[data-g="A"] { background: #038141; }
.nutri span[data-g="B"] { background: #85bb2f; }
.nutri span[data-g="C"] { background: #fecb02; color: #4a3a00; }
.nutri span[data-g="D"] { background: #ee8100; }
.nutri span[data-g="E"] { background: #e63e11; }
.nutri span.active { opacity: 1; transform: scale(1.3); box-shadow: 0 0.1875rem 0.625rem rgba(0, 0, 0, 0.3); z-index: 99; }

.points { font-size: 0.8rem; color: var(--muted); margin-top: 0.5rem; }

.summary {
  background: #f1f7f2;
  border-left: 4px solid var(--accent);
  padding: 0.75rem 1rem;
  border-radius: 0 0.625rem 0.625rem 0;
  font-size: 0.93rem;
}

.flags { list-style: none; padding: 0; margin: 0; }
.flags li {
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 0.625rem;
  padding: 0.625rem 0.875rem;
  margin-bottom: 0.5rem;
  font-size: 0.87rem;
}
.flags li strong { text-transform: capitalize; }
.flags li .tag {
  float: right;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.65;
  margin-left: 0.5rem;
}
.flags li.dietary_warning { border-left-color: var(--nonveg); background: #fdf4f4; }
.flags li.health_alert { border-left-color: #e65100; background: #fff8f0; }
.flags li.nuance_note { border-left-color: var(--grey); background: #fffbf1; padding: 0.625rem 0.875rem; }
.flags li.none { border-left-color: var(--vegan); background: #f2f9f3; }

.chips { display: flex; flex-wrap: wrap; gap: 0.375rem; }
.chips span {
  background: #eef4ef;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  font-size: 0.78rem;
}
.muted { color: var(--muted); font-weight: 400; font-size: 0.8rem; }

.json-details { margin-top: 1.375rem; }
.json-details summary { font-size: 0.95rem; font-weight: 600; cursor: pointer; }
pre {
  background: #112519;
  color: #c9e8d4;
  border-radius: 0.75rem;
  padding: 1rem;
  font-size: 0.74rem;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin-top: 0.625rem;
}

/* ---------- Methodology ---------- */
.methodology {
  max-width: 1180px;
  margin: 0.375rem auto 1rem;
  padding: 0 1.5rem;
}
.methodology > h2 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin: 1.125rem 0 0.25rem;
  text-align: center;
}
.method-intro { text-align: center; color: var(--muted); font-size: 0.92rem; margin: 0 0 1.125rem; }
.method-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.375rem; }
.method-grid > * { min-width: 0; }
.method-grid h3 { margin-top: 0; font-size: 1.05rem; }
.method-grid h4 { margin: 1.125rem 0 0.5rem; font-size: 0.88rem; }
.method-grid p { font-size: 0.87rem; }
.ladder { padding-left: 1.125rem; font-size: 0.86rem; }
.ladder li { margin-bottom: 0.625rem; }
.ladder .badge { font-size: 0.72rem; padding: 0.1875rem 0.625rem; box-shadow: none; margin-right: 0.375rem; }

.table-wrap { overflow-x: auto; }
.methodology table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.78rem;
}
.methodology th, .methodology td {
  border: 1px solid var(--border);
  padding: 0.3125rem 0.5rem;
  text-align: center;
  white-space: nowrap;
}
.methodology th { background: #eef4ef; font-weight: 600; }
.methodology td:first-child, .methodology th:first-child { text-align: left; font-weight: 600; }

/* ---------- Banner ---------- */
.banner {
  display: grid;
  grid-template-columns: clamp(10rem, 25%, 17.5rem) 1fr;
  gap: 0;
  align-items: stretch;
  max-width: 70.75rem;
  width: calc(100% - 3rem);
  margin: 1.5rem auto;
  background: var(--accent-deep);
  border-radius: var(--radius);
  overflow: hidden;
  color: #e8f2ea;
}
.banner img { width: 100%; height: 100%; min-height: 11.875rem; object-fit: cover; display: block; }
.banner-copy { padding: 1.5rem 1.875rem 1.5rem 1.5rem; display: flex; flex-direction: column; justify-content: center; }
.banner-copy h2 { font-family: var(--font-display); margin: 0 0 0.5rem; color: #fff; }
.banner-copy p { margin: 0; font-size: 0.92rem; opacity: 0.9; }
.banner-ai-note {
  margin-top: 0.75rem !important;
  font-size: 0.78rem !important;
  opacity: 1 !important;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 0.375rem;
  padding: 0.4375rem 0.625rem;
}
.banner-ai-note::before { content: "ℹ️  "; }

/* ---------- Footer ---------- */
footer {
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
  padding: 1.625rem 1.5rem 2.125rem;
  max-width: 53.75rem;
  margin: 0 auto;
}
footer .credits { opacity: 0.8; }
footer a { color: var(--accent-dark); }

/* ---------- Responsive ---------- */
@media (max-width: 920px) {
  main { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; margin-top: -1.25rem; }
  .step:not(:last-child)::after { display: none; }
  .method-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .topnav { padding: 1rem 1.25rem; }
  .topnav.scrolled, .topnav.menu-open { padding-top: 1rem; padding-bottom: 1rem; }
  .hero { min-height: 20.625rem; }
  .hero-overlay { padding-top: 4.5rem; padding-bottom: 2rem; }
  .hero-copy { margin: 0.5rem 1rem; }
  .steps { margin-top: -0.75rem; }
  .lang-select { max-width: 6.25rem; padding: 0.3125rem 1.25rem 0.3125rem 0.5rem; font-size: 0.72rem; background-position: right 0.4375rem center; }
  .banner { grid-template-columns: 1fr; width: calc(100% - 2rem); margin: 0.625rem auto 0; }
  .banner img { max-height: 12.5rem; }
  .banner-copy { padding: 1.25rem 1.375rem 1.375rem; }
}

@media (max-width: 560px) {
  main { padding: 1rem 0.75rem; gap: 1rem; }
  .steps, .methodology { padding-left: 0.75rem; padding-right: 0.75rem; }
  .panel { padding: 1.25rem 1rem 1.125rem; }
  .grid { grid-template-columns: 1fr; }
  .result-top { flex-direction: column; align-items: center; gap: 2rem; }
  .nutri span { width: 1.875rem; height: 2.125rem; font-size: 0.9rem; }
  .dz-actions button { flex: 1; }
  .demos { gap: 0.375rem; }
  .demos .secondary { font-size: 0.78rem; padding: 0.4375rem 0.75rem; }
  #empty-state img { max-height: 11.25rem; }
  .hero-overlay { padding-top: 4rem; padding-bottom: 1.25rem; }
  .flags li .tag { float: none; display: inline-block; margin: 0.25rem; }
  #parse-nutrition { margin: 0.5rem 0; }
  .method-intro { text-align: left; }
}

@media (max-width: 400px) {
  .topnav { padding: 0.75rem 1rem; }
  .topnav.scrolled, .topnav.menu-open { padding-top: 0.75rem; padding-bottom: 0.75rem; }
  .topnav .logo { height: 2rem; }
  .lang-select { max-width: 4.75rem; font-size: 0.68rem; padding: 0.25rem 1.125rem 0.25rem 0.375rem; background-position: right 0.375rem center; }
  .nutri span { width: 1.5rem; height: 1.75rem; font-size: 0.78rem; }
  .banner-copy { padding: 0 1rem 1rem; }
  .steps { gap: 0.75rem; }
  .step { padding: 1.125rem 0.875rem 1rem; }
  .step-icon { width: 3rem; height: 3rem; }
  .step-icon svg { width: 1.25rem; height: 1.25rem; }
  .methodology > h2 { font-size: 1.35rem; }
}

/* ---------- Tooltips ---------- */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 0.5rem);
  left: 50%;
  transform: translateX(-50%);
  background: #1c2a21;
  color: #fff;
  font-size: 0.72rem;
  line-height: 1.45;
  padding: 0.3125rem 0.625rem;
  border-radius: 0.3125rem;
  white-space: normal;
  text-align: center;
  max-width: 12.5rem;
  width: max-content;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 200;
}
[data-tooltip]::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 0.125rem);
  left: 50%;
  transform: translateX(-50%);
  /* CSS triangle — intentional fixed-px geometry */
  border: 5px solid transparent;
  border-top-color: #1c2a21;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease;
  z-index: 200;
}
[data-tooltip]:hover::after { opacity: 1; }
[data-tooltip]:hover::before { opacity: 1; }

@media (hover: none) {
  /* touch devices: bigger tap targets; hide hover-only tooltips */
  button { padding: 0.8125rem 1.5rem; }
  button.secondary { padding: 0.6875rem 1rem; }
  [data-tooltip]::after,
  [data-tooltip]::before { display: none; }
}

/* ---------- RTL (ar, ur, fa) ---------- */
[dir="rtl"] .summary {
  border-left: none;
  border-right: 4px solid var(--accent);
  border-radius: 0.625rem 0 0 0.625rem;
}
[dir="rtl"] .flags li { border-left-width: 1px; border-right-width: 4px; }
[dir="rtl"] .flags li.dietary_warning { border-right-color: var(--nonveg); }
[dir="rtl"] .flags li.health_alert { border-right-color: #e65100; }
[dir="rtl"] .flags li.nuance_note { border-right-color: var(--grey); }
[dir="rtl"] .flags li.none { border-right-color: var(--vegan); }
[dir="rtl"] .flags li .tag { float: left; margin-left: 0.25rem; margin-right: 0.5rem; }
[dir="rtl"] .ocr-warning {
  border-left-width: 1px;
  border-right: 4px solid #e65100;
}
[dir="rtl"] .hero-overlay {
  background: linear-gradient(260deg, rgba(10, 36, 21, 0.92) 0%, rgba(16, 56, 33, 0.72) 45%, rgba(18, 56, 35, 0.25) 100%);
}

/* ---------- AI Vision OCR settings ---------- */
#ai-settings { margin: 0.625rem 0 0.125rem; font-size: 0.85rem; }
#ai-settings > summary {
  cursor: pointer; list-style: none;
  font-weight: 600; color: var(--muted);
  padding: 0.3125rem 0; user-select: none;
}
#ai-settings > summary::-webkit-details-marker { display: none; }
#ai-settings > summary::before { content: "▶ "; font-size: 0.7em; transition: transform 0.15s; }
#ai-settings[open] > summary::before { content: "▼ "; }
.ai-settings-body {
  padding: 0.625rem 0 0.25rem;
  display: flex; flex-direction: column; gap: 0.375rem;
}
.ai-engines { display: flex; gap: 1.125rem; flex-wrap: wrap; margin-bottom: 0.125rem; }
.ai-radio { display: flex; align-items: center; gap: 0.375rem; font-weight: 500; cursor: pointer; }
.ai-radio input[type="radio"] { accent-color: var(--accent); cursor: pointer; }

/* ---------- PWA standalone (iOS black-translucent status bar) ---------- */
/* viewport-fit=cover lets content bleed under the translucent status bar.
   The topnav absorbs the safe-area-inset-top so content is never obscured.
   The bottom inset guards against the iPhone home-indicator overlap.        */
@media (display-mode: standalone) {
  .topnav {
    padding-top: calc(0.875rem + env(safe-area-inset-top, 0px));
  }
  .topnav.scrolled,
  .topnav.menu-open {
    padding-top: calc(0.625rem + env(safe-area-inset-top, 0px));
  }
  body {
    padding-bottom: env(safe-area-inset-bottom, 0px);
  }
}