/* SmartFridge Vision MVP — styles
   Modern, responsive, mobile-first. Freshness is conveyed by colour AND text so it
   remains legible to colour-blind users. */

:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #f0f3f6;
  --text: #1c2733;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-contrast: #ffffff;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08), 0 8px 24px rgba(15, 23, 42, 0.06);

  /* Freshness palette */
  --fresh: #16a34a;
  --fresh-bg: #dcfce7;
  --ripe: #0d9488;
  --ripe-bg: #ccfbf1;
  --use-soon: #b45309;
  --use-soon-bg: #fef3c7;
  --spoiled: #dc2626;
  --spoiled-bg: #fee2e2;
  --unknown: #64748b;
  --unknown-bg: #e2e8f0;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface-2: #273449;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --border: #334155;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);

    --fresh-bg: #14351f;
    --ripe-bg: #0f3b34;
    --use-soon-bg: #3d2f0c;
    --spoiled-bg: #3d1414;
    --unknown-bg: #2b3648;
  }
}

* { box-sizing: border-box; }

/* The `hidden` attribute must win even over elements that set an explicit
   `display` via a class (e.g. .loading / .results below) or `display: contents`. */
[hidden] { display: none !important; }

/* A layout-neutral wrapper: its children participate in the parent's flex/grid as if
   the wrapper weren't there, yet the whole group can be hidden with one `hidden`. */
.contents { display: contents; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.site-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}
.site-header h1 {
  margin: 0;
  font-size: 1.9rem;
}
.tagline {
  margin: 0.4rem auto 0;
  max-width: 34rem;
  color: var(--text-muted);
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}

.section-title {
  margin: 0 0 0.75rem;
  font-size: 1.15rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--surface-2);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1rem;
}
.tab {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.6rem 1rem;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.tab.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.12);
}

/* --- Dropzone --- */
.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius-sm);
  padding: 2.5rem 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone:hover,
.dropzone:focus-visible {
  border-color: var(--primary);
  background: var(--surface-2);
  outline: none;
}
.dropzone.dragover {
  border-color: var(--primary);
  background: var(--surface-2);
}
.dropzone-inner p { margin: 0.2rem 0; }
.dropzone-icon { font-size: 2.5rem; }

/* --- Webcam --- */
.webcam-wrap {
  background: #000;
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
}
#video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.webcam-controls {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

/* --- Preview --- */
.preview-row {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  flex-wrap: wrap;
}
.preview-img {
  max-width: 260px;
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.preview-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 160px;
}

/* --- Buttons --- */
.btn {
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.65rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.15s, opacity 0.15s, border-color 0.15s;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary {
  background: var(--primary);
  color: var(--primary-contrast);
}
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border-color: var(--border);
}
.btn-secondary:hover:not(:disabled) { border-color: var(--primary); }
.btn-ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn-ghost:hover:not(:disabled) { color: var(--text); }

/* --- Loading --- */
.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.25rem;
  color: var(--text-muted);
}
.spinner {
  width: 1.15rem;
  height: 1.15rem;
  border: 2.5px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* --- Error --- */
.error-banner {
  background: var(--spoiled-bg);
  color: var(--spoiled);
  border: 1px solid var(--spoiled);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1.1rem;
  font-weight: 500;
}

/* --- Results --- */
.results { display: flex; flex-direction: column; gap: 1.5rem; }
.count-pill {
  font-size: 0.8rem;
  font-weight: 600;
  background: var(--surface-2);
  color: var(--text-muted);
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 0.9rem;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.5rem;
}
.card-name {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: capitalize;
}
.card-count {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
}
.card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}
.chip {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-muted);
  text-transform: capitalize;
}
.card-notes {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Freshness badges */
.badge {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  text-transform: capitalize;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}
.badge::before {
  content: "";
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: currentColor;
}
.badge-fresh    { color: var(--fresh);    background: var(--fresh-bg); }
.badge-ripe     { color: var(--ripe);     background: var(--ripe-bg); }
.badge-use_soon { color: var(--use-soon); background: var(--use-soon-bg); }
.badge-spoiled  { color: var(--spoiled);  background: var(--spoiled-bg); }
.badge-unknown  { color: var(--unknown);  background: var(--unknown-bg); }

.conf-low { opacity: 0.85; }

/* --- Fridge (current inventory) --- */
.fridge-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}
.fridge-head p { margin: 0; }

.fridge-empty {
  text-align: center;
  padding: 1.5rem 1rem 0.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}
.fridge-empty p { max-width: 34rem; margin: 0; }

.fridge-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
}
.fridge-total {
  font-size: 1.25rem;
  font-weight: 800;
}
.fridge-freshness {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

/* Prominent "use these first" nudge for spoiled / use-soon items. */
.fridge-callout {
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0.7rem 1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}
.fridge-callout-soon {
  background: var(--use-soon-bg);
  color: var(--use-soon);
  border-color: var(--use-soon);
}
.fridge-callout-spoiled {
  background: var(--spoiled-bg);
  color: var(--spoiled);
  border-color: var(--spoiled);
}

/* Collapse toggle for the item list — sits between the callout and the groups. */
.fridge-toggle { display: block; margin: 0.35rem 0 1rem; }
.fridge-groups {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.fridge-group-title {
  text-transform: capitalize;
  font-size: 1.05rem;
}
#fridge-unidentified { margin: 1.25rem 0 0; }

/* --- History --- */
.history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}
.history-head p { margin: 0; }
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.scan-entry {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.scan-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.scan-when {
  font-weight: 700;
  font-size: 0.95rem;
}
.scan-items {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}
/* In history, badges label individual items — keep them compact and readable. */
.scan-items .badge {
  text-transform: none;
  font-weight: 600;
}
.scan-unidentified { margin: 0; }

/* Expandable "everything in this image" detail, grouped by category. */
.scan-toggle {
  align-self: flex-start;
  background: none;
  border: none;
  padding: 0.15rem 0;
  margin: 0;
  color: var(--primary);
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}
.scan-toggle:hover { text-decoration: underline; }
.scan-detail {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  margin-top: 0.2rem;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--border);
}
.scan-detail-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.scan-detail-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: capitalize;
}
/* Detail cards sit on the entry's tinted surface — lighten them to keep contrast. */
.scan-detail .card { background: var(--surface); }
.scan-detail .count-pill { border: 1px solid var(--border); }

/* --- Footer / misc --- */
.site-footer {
  text-align: center;
  padding: 1.5rem 1rem 2.5rem;
}
.muted { color: var(--text-muted); }
.small { font-size: 0.85rem; }

@media (max-width: 520px) {
  .site-header h1 { font-size: 1.5rem; }
  .preview-img { max-width: 100%; }
  .preview-actions { min-width: 100%; }
}