:root {
  --bg: #f6f5f2;
  --fg: #1d1d1f;
  --muted: #6b6b70;
  --card: #ffffff;
  --line: #e3e1dc;
  --accent: #1f6feb;
  --accent-fg: #ffffff;
  --ok: #1f8a4c;
  --alerta: #c2410c;
  --radius: 12px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141416;
    --fg: #f1f1f3;
    --muted: #9a9aa2;
    --card: #1e1e21;
    --line: #2e2e33;
    --accent: #6aa2ff;
    --accent-fg: #0b1220;
    --ok: #4cc67f;
    --alerta: #fb923c;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #141416;
  --fg: #f1f1f3;
  --muted: #9a9aa2;
  --card: #1e1e21;
  --line: #2e2e33;
  --accent: #6aa2ff;
  --accent-fg: #0b1220;
  --ok: #4cc67f;
  --alerta: #fb923c;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
  padding-bottom: 88px; /* espaço para a barra de abas */
}
h1 { font-size: 26px; margin: 0 0 16px; }
h2 { font-size: 22px; margin: 8px 0 4px; }
h3 { font-size: 17px; margin: 28px 0 10px; padding-top: 14px; border-top: 1px solid var(--line); }
.sub, .vazio { color: var(--muted); margin: 4px 0 12px; }
.principal { padding: 16px; max-width: 720px; margin: 0 auto; }

:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

.topo {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--card);
  position: sticky; top: 0; z-index: 2;
}

/* ── Botões ─────────────────────────────────────────────── */
button, .cartao-link {
  min-height: 44px; font: inherit; border-radius: 10px; cursor: pointer;
}
button { padding: 10px 16px; border: 1px solid var(--line); background: var(--card); color: var(--fg); }
button:disabled { opacity: .6; cursor: progress; }
.primario { background: var(--accent); color: var(--accent-fg); border-color: transparent; font-weight: 600; width: 100%; }
.secundario { width: 100%; font-weight: 600; }
.ghost { background: transparent; border-color: transparent; color: var(--accent); }
.pequeno { min-height: 40px; width: auto; padding: 8px 12px; }

/* ── Formulários ────────────────────────────────────────── */
.form { display: grid; gap: 12px; margin-top: 8px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
label.checar { display: flex; align-items: center; gap: 10px; color: var(--fg); min-height: 44px; }
label.checar input { width: 22px; height: 22px; }
input, select {
  font: inherit; color: var(--fg); background: var(--card);
  border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; min-height: 44px; width: 100%;
}
.linha { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.mes { max-width: 220px; margin-bottom: 12px; }
.divisor { display: flex; align-items: center; gap: 12px; color: var(--muted); margin: 18px 0; }
.divisor::before, .divisor::after { content: ""; flex: 1; height: 1px; background: var(--line); }

/* ── Cartões e listas ───────────────────────────────────── */
.cartoes { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; }
.cartao, .cartao-link {
  display: grid; gap: 4px; padding: 14px; background: var(--card);
  border: 1px solid var(--line); border-radius: var(--radius); color: var(--fg); text-decoration: none;
}
.cartao span, .cartao-link span { color: var(--muted); font-size: 14px; }
.cartao strong { font-size: 19px; font-variant-numeric: tabular-nums; }
.cartao.ok strong { color: var(--ok); }
.cartao.alerta strong { color: var(--alerta); }
.cartao-link { margin-bottom: 10px; min-height: 64px; }
.lista { list-style: none; padding: 0; margin: 8px 0 0; display: grid; gap: 8px; }
.item {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  font-variant-numeric: tabular-nums;
}
.item > div { display: grid; gap: 2px; min-width: 0; overflow-wrap: anywhere; }
.item span { color: var(--muted); font-size: 14px; }
.selo { color: var(--ok); font-weight: 600; font-size: 14px; }

/* ── Gráfico de km/L ────────────────────────────────────── */
.grafico { display: flex; align-items: flex-end; gap: 10px; height: 180px; padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); }
.grafico .vazio { margin: auto; text-align: center; }
.coluna { flex: 1; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 4px; }
.barra { width: 100%; max-width: 44px; background: var(--accent); border-radius: 6px 6px 2px 2px; }
.coluna .valor, .coluna .mes { font-size: 12px; color: var(--muted); }

/* ── Login e abas ───────────────────────────────────────── */
.entrar { max-width: 420px; margin: 24px auto 0; }
.aviso, [role="status"] { padding: 10px 12px; border-radius: 10px; margin: 8px 0; font-size: 15px; }
[role="status"]:not([hidden]) { background: color-mix(in srgb, var(--alerta) 14%, transparent); color: var(--alerta); }
[role="status"][data-tipo="ok"] { background: color-mix(in srgb, var(--ok) 14%, transparent); color: var(--ok); }

.abas {
  position: fixed; left: 0; right: 0; bottom: 0; display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--card); border-top: 1px solid var(--line);
  padding: 6px max(8px, env(safe-area-inset-left)) calc(6px + env(safe-area-inset-bottom)) max(8px, env(safe-area-inset-right));
  z-index: 3;
}
.abas button { border: 0; background: transparent; color: var(--muted); font-size: 13px; min-height: 52px; padding: 6px 2px; }
.abas button[aria-selected="true"] { color: var(--accent); font-weight: 700; }

.lista .item button { flex-shrink: 0; }

@media (min-width: 720px) {
  .principal { padding: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}