:root {
  --fundo: #f4f6f5;
  --cartao: #ffffff;
  --texto: #1c2321;
  --sutil: #6b7672;
  --borda: #e3e8e6;
  --primaria: #0f766e;
  --primaria-clara: #ccfbf1;
  --perigo: #c0392b;
  --verde: #2e9d5b;
  --sombra: 0 1px 2px rgba(0,0,0,.05), 0 4px 14px rgba(0,0,0,.05);
  --raio: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fundo: #0f1413;
    --cartao: #1a2120;
    --texto: #e7eeec;
    --sutil: #94a3a0;
    --borda: #2a3432;
    --primaria: #2dd4bf;
    --primaria-clara: #123a36;
    --sombra: none;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html, body { margin: 0; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--fundo); color: var(--texto);
  font-size: 16px; line-height: 1.4;
}
[hidden] { display: none !important; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--primaria); }
.sutil { color: var(--sutil); font-size: .9rem; }
.erro { color: var(--perigo); font-size: .9rem; min-height: 1.2em; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

/* ---------- Topo ---------- */
.topo {
  position: sticky; top: 0; z-index: 5;
  display: flex; align-items: center; gap: 8px;
  padding: calc(env(safe-area-inset-top) + 10px) 16px 10px;
  background: var(--fundo);
  border-bottom: 1px solid var(--borda);
}
.topo h1 { font-size: 1.15rem; margin: 0; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mes-nav { display: flex; align-items: center; gap: 2px; }
.mes-nav span { font-weight: 600; font-size: .95rem; min-width: 92px; text-align: center; text-transform: capitalize; }
.icone-btn {
  border: 0; background: transparent; width: 36px; height: 36px; border-radius: 50%;
  font-size: 1.5rem; line-height: 1; cursor: pointer; color: var(--texto);
}
.icone-btn:active { background: var(--borda); }

main { max-width: 600px; margin: 0 auto; padding: 16px 16px calc(96px + env(safe-area-inset-bottom)); }

/* ---------- Abas ---------- */
.abas {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 5;
  display: flex; justify-content: space-around; align-items: flex-end;
  background: var(--cartao); border-top: 1px solid var(--borda);
  padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
}
.abas a {
  flex: 1; display: flex; flex-direction: column; align-items: center; gap: 2px;
  text-decoration: none; color: var(--sutil); font-size: .72rem; padding: 4px 0;
}
.abas a span { font-size: 1.3rem; filter: grayscale(1); opacity: .7; }
.abas a.ativa { color: var(--primaria); font-weight: 600; }
.abas a.ativa span { filter: none; opacity: 1; }
.abas a.central span {
  filter: none; opacity: 1;
  width: 52px; height: 52px; margin-top: -24px; border-radius: 50%;
  display: grid; place-items: center; background: var(--primaria); color: #fff;
  box-shadow: 0 4px 12px rgba(15,118,110,.35); font-size: 1.45rem;
}

/* ---------- Cartões ---------- */
.cartao { background: var(--cartao); border-radius: var(--raio); padding: 16px; box-shadow: var(--sombra); margin-bottom: 14px; border: 1px solid var(--borda); }
.cartao h2 { font-size: 1rem; margin: 0 0 12px; }
.total-grande { font-size: 2.1rem; font-weight: 700; letter-spacing: -.5px; margin: 2px 0; }
.variacao { font-size: .85rem; font-weight: 600; }
.variacao.sobe { color: var(--perigo); }
.variacao.desce { color: var(--verde); }

/* barras por categoria */
.barra-empilhada { display: flex; height: 12px; border-radius: 6px; overflow: hidden; margin: 14px 0 4px; background: var(--borda); }
.barra-empilhada div { height: 100%; }
.cat-linha {
  display: grid; grid-template-columns: 34px 1fr auto; gap: 4px 10px; align-items: center;
  padding: 10px 0; border-top: 1px solid var(--borda); cursor: pointer;
}
.cat-linha:first-child { border-top: 0; }
.cat-icone { width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center; font-size: 1.1rem; grid-row: span 2; }
.cat-nome { font-weight: 600; font-size: .95rem; }
.cat-valor { font-weight: 600; text-align: right; }
.cat-barra { grid-column: 2 / 4; height: 6px; background: var(--borda); border-radius: 3px; overflow: hidden; }
.cat-barra div { height: 100%; border-radius: 3px; }
.cat-pct { font-size: .78rem; color: var(--sutil); }

/* listas */
.lista { list-style: none; margin: 0; padding: 0; }
.lista li { display: flex; align-items: center; gap: 12px; padding: 12px 0; border-top: 1px solid var(--borda); }
.lista li:first-child { border-top: 0; }
.lista .grow { flex: 1; min-width: 0; }
.lista .titulo { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lista .sub { font-size: .82rem; color: var(--sutil); }
.lista a { color: inherit; text-decoration: none; display: contents; }
.dia { font-size: .8rem; font-weight: 700; color: var(--sutil); text-transform: uppercase; letter-spacing: .4px; margin: 18px 4px 6px; }

/* itens da nota */
.item { padding: 12px 0; border-top: 1px solid var(--borda); }
.item:first-child { border-top: 0; }
.item-topo { display: flex; justify-content: space-between; gap: 10px; }
.item-desc { font-weight: 600; font-size: .93rem; }
.item-det { font-size: .8rem; color: var(--sutil); margin: 2px 0 6px; }
.chip-select {
  appearance: none; -webkit-appearance: none;
  border: 1px solid var(--borda); border-radius: 999px; padding: 5px 30px 5px 12px; font-size: .85rem;
  background: var(--fundo) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E") no-repeat right 12px center;
  max-width: 100%;
}

/* formulários */
label.campo { display: block; margin-bottom: 12px; }
label.campo > span { display: block; font-size: .85rem; color: var(--sutil); margin-bottom: 4px; }
input[type=text], input[type=password], input[type=date], input[type=url], input[type=number], input:not([type]), select, textarea {
  width: 100%; padding: 12px 14px; border: 1px solid var(--borda); border-radius: 10px;
  background: var(--cartao); font-size: 16px;
}
textarea { min-height: 140px; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primaria); outline-offset: -1px; }
.linha-form { display: flex; gap: 8px; }
.linha-form > * { flex: 1; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: 1px solid var(--borda); background: var(--cartao); border-radius: 12px;
  padding: 12px 16px; font-weight: 600; cursor: pointer; text-decoration: none; color: var(--texto);
}
.btn.primario { background: var(--primaria); border-color: var(--primaria); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primario { color: #062925; } }
.btn.perigo { color: var(--perigo); }
.btn.largo { width: 100%; }
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .5; }
.botoes { display: grid; gap: 10px; }
.botoes.dois { grid-template-columns: 1fr 1fr; }

/* scanner */
.scanner {
  position: relative; aspect-ratio: 3 / 4; max-height: 60vh; width: 100%;
  background: #000; border-radius: var(--raio); overflow: hidden; margin-bottom: 14px;
}
.scanner video { width: 100%; height: 100%; object-fit: cover; }
.scanner .mira {
  position: absolute; inset: 0; margin: auto; width: 62%; aspect-ratio: 1;
  border-radius: 18px; box-shadow: 0 0 0 9999px rgba(0,0,0,.45);
  border: 3px solid rgba(255,255,255,.9);
}
.scanner .dica { position: absolute; left: 0; right: 0; bottom: 14px; text-align: center; color: #fff; font-size: .9rem; text-shadow: 0 1px 3px #000; }
.scanner .parado { position: absolute; inset: 0; display: grid; place-items: center; color: #fff; text-align: center; padding: 20px; }

/* palavras-chave */
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { display: inline-flex; align-items: center; gap: 4px; background: var(--fundo); border: 1px solid var(--borda); border-radius: 999px; padding: 4px 6px 4px 10px; font-size: .82rem; }
.chip.aprendida { border-style: dashed; }
.chip button { border: 0; background: transparent; cursor: pointer; color: var(--sutil); font-size: 1rem; padding: 0 4px; }

.vazio { text-align: center; padding: 30px 10px; color: var(--sutil); }
.vazio .grande { font-size: 2.6rem; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-caixa { width: 100%; max-width: 340px; text-align: center; }
.login-caixa .logo { font-size: 3.4rem; }
.login-caixa h1 { margin: 6px 0 2px; }
.login-caixa input { margin: 16px 0 10px; text-align: center; }

/* toast e carregando */
.toast {
  position: fixed; left: 16px; right: 16px; bottom: calc(86px + env(safe-area-inset-bottom)); z-index: 20;
  max-width: 520px; margin: 0 auto; background: #1c2321; color: #fff; padding: 12px 16px; border-radius: 12px;
  font-size: .92rem; box-shadow: 0 6px 20px rgba(0,0,0,.25);
}
.carregando { position: fixed; inset: 0; z-index: 30; background: rgba(0,0,0,.45); display: grid; place-content: center; justify-items: center; color: #fff; }
.spinner { width: 42px; height: 42px; border-radius: 50%; border: 4px solid rgba(255,255,255,.3); border-top-color: #fff; animation: gira 0.8s linear infinite; }
@keyframes gira { to { transform: rotate(360deg); } }

details.ajuda summary { cursor: pointer; font-weight: 600; }
details.ajuda p, details.ajuda ol { font-size: .9rem; color: var(--sutil); }