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

/* O atributo hidden sempre vence: regras de classe como `.scan-step{display:grid}`
   têm a mesma especificidade que `[hidden]{display:none}` do navegador e, vindo
   depois, anulariam o hidden — deixando passos e overlays na tela ao mesmo tempo. */
[hidden] { display: none !important; }

:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #0f172a;
  --muted: #64748b;
  --accent: #0d9488;
  --accent-soft: #ccfbf1;
  --danger: #b91c1c;
  --danger-soft: #fee2e2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --accent: #2dd4bf;
    --accent-soft: #134e4a;
    --danger: #fca5a5;
    --danger-soft: #450a0a;
  }
}

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  padding-bottom: 3rem;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem .5rem;
  max-width: 60rem;
  margin: 0 auto;
}

header h1 { font-size: 1.5rem; margin: 0; letter-spacing: -.02em; }
header h1 a { color: var(--text); text-decoration: none; }
header h1 span { color: var(--accent); }

.banner-simulado {
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .8125rem;
  text-align: center;
  margin: 0;
  padding: .5rem 1rem;
}

/* Tabs inferiores fixas */
nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  justify-content: space-around;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: .35rem .25rem calc(.35rem + env(safe-area-inset-bottom));
}

nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: .7rem;
  font-weight: 500;
  padding: .3rem 0;
  border-radius: .5rem;
}

nav a .icon { font-size: 1.35rem; line-height: 1; filter: grayscale(1); opacity: .7; }
nav a.active { color: var(--accent); }
nav a.active .icon { filter: none; opacity: 1; }

main { max-width: 60rem; margin: 0 auto; padding: 0 1.25rem 5.5rem; }

h2 { font-size: 1.375rem; margin: 1rem 0 .5rem; letter-spacing: -.01em; }
h3 { font-size: 1rem; margin: 1.5rem 0 .5rem; }

.muted { color: var(--muted); font-size: .9375rem; }
.row-between { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; }
.actions { display: flex; gap: .5rem; }

label { display: block; font-size: .875rem; font-weight: 500; margin: .75rem 0 .25rem; }

input, select {
  width: 100%;
  padding: .625rem .75rem;
  border: 1px solid var(--border);
  border-radius: .5rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1rem;
}

button {
  padding: .625rem 1rem;
  border: 1px solid var(--border);
  border-radius: .5rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: .9375rem;
  cursor: pointer;
}

button:disabled { opacity: .5; cursor: not-allowed; }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
button.primary:disabled { opacity: .6; }
button.danger { color: var(--danger); }
form button.primary, #scan-import, #review-confirm { margin-top: 1rem; }

hr { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }

.error, .info {
  border-radius: .5rem;
  padding: .625rem .75rem;
  font-size: .9375rem;
  margin: 1rem 0 0;
}

.error { background: var(--danger-soft); color: var(--danger); }
.info { background: var(--accent-soft); color: var(--accent); }
.info a { color: inherit; }

/* Scanner */
.scanner { display: grid; gap: .75rem; justify-items: start; }

.btn-file {
  display: inline-block;
  padding: .625rem 1rem;
  border: 1px solid var(--border);
  border-radius: .5rem;
  background: var(--surface);
  color: var(--text);
  font-size: .9375rem;
  cursor: pointer;
  margin: 0;
}
#scan-video { width: 100%; max-width: 28rem; border-radius: .75rem; background: #000; aspect-ratio: 1; object-fit: cover; }

/* Passos do escanear */
.scan-step { display: grid; gap: .75rem; justify-items: start; }
.step-label {
  color: var(--accent);
  font-weight: 600;
  font-size: .875rem;
  margin: .5rem 0 0;
}
.scan-step .btn-file, .scan-step button, .scan-step input[type="text"], .scan-step input { width: 100%; max-width: 28rem; }
.scan-step .scanner { width: 100%; }

/* Area de recorte */
.crop-area {
  position: relative;
  display: inline-block;
  max-width: 100%;
  touch-action: none;
  user-select: none;
  line-height: 0;
  /* Confina a mascara escura (box-shadow da caixa) aos limites da imagem. */
  overflow: hidden;
  border-radius: .5rem;
}
#crop-img { display: block; max-width: 100%; max-height: 60vh; border-radius: .5rem; }
.crop-box {
  position: absolute;
  border: 2px solid var(--accent);
  box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .45);
  cursor: move;
}
.crop-handle {
  position: absolute;
  right: -11px;
  bottom: -11px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  cursor: nwse-resize;
  touch-action: none;
}

.processing {
  display: flex;
  align-items: center;
  gap: .5rem;
  color: var(--muted);
  font-size: .9375rem;
}

.spinner {
  width: 1.1rem;
  height: 1.1rem;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation: none; } }

/* Cards e tabela */
.cards { display: grid; gap: .75rem; margin-top: .75rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: .75rem;
  padding: .875rem 1rem;
}

.card .title { font-weight: 600; }
.card .meta { color: var(--muted); font-size: .875rem; }
.card .price { color: var(--accent); font-weight: 600; }
.card .row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.card.approximate { border-color: var(--accent); }

.tag {
  display: inline-block;
  font-size: .75rem;
  padding: .1rem .45rem;
  border-radius: .25rem;
  background: var(--border);
  color: var(--muted);
}

.tag.warn { background: var(--danger-soft); color: var(--danger); }
.tag.sim { background: var(--accent-soft); color: var(--accent); }

.match-compare { display: grid; gap: .25rem; margin: .5rem 0; font-size: .875rem; }
.match-compare code { background: var(--bg); padding: .1rem .35rem; border-radius: .25rem; }

.filters { display: grid; gap: .5rem; grid-template-columns: 1fr 1fr; align-items: end; }

/* Produtos: sempre tabela. No mobile fica compacta, escondendo colunas opcionais. */
.listing table { width: 100%; border-collapse: collapse; margin-top: 1rem; }

.listing th, .listing td {
  text-align: left;
  padding: .55rem .4rem;
  border-bottom: 1px solid var(--border);
  font-size: .9375rem;
}

.listing td.num, .listing th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

.listing th {
  color: var(--muted);
  font-weight: 500;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* Tela estreita: esconde a coluna de categoria e aperta o espacamento. */
@media (max-width: 34rem) {
  .listing .col-optional { display: none; }
  .listing th, .listing td { padding: .5rem .3rem; font-size: .875rem; }
}

/* Toggle */
.switch { display: inline-flex; align-items: center; gap: .5rem; cursor: pointer; }
.switch input { width: auto; }

/* Itens da revisao */
.review-item { display: flex; align-items: flex-start; gap: .75rem; }
.review-item input { width: auto; margin-top: .35rem; }
.review-item.disabled { opacity: .6; }