:root {
  --fundo: #edf1f0;
  --papel: #ffffff;
  --tinta: #17211f;
  --suave: #5d6b68;
  --linha: #cfd8d5;
  --cor: #0f6b5f;        /* verde-petróleo: ação principal */
  --cor-texto: #ffffff;
  --perigo: #b42318;
  --discord: #5865f2;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fundo: #0f1514;
    --papel: #172120;
    --tinta: #e6efed;
    --suave: #93a5a1;
    --linha: #2a3a37;
    --cor: #34b8a6;
    --cor-texto: #06201c;
    --perigo: #ff8a80;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 "Segoe UI", system-ui, sans-serif; background: var(--fundo); color: var(--tinta); }
main { max-width: 760px; margin: 0 auto; padding: 16px; }
footer { text-align: center; color: var(--suave); font-size: .8rem; padding: 24px 16px; }
h1, h2 { margin: 0 0 8px; line-height: 1.2; }
h2 { font-size: 1.1rem; }

.card { background: var(--papel); border: 1px solid var(--linha); border-radius: 8px; padding: 16px; margin-bottom: 16px; }
.topo { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.usuario { display: flex; align-items: center; gap: 8px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row input { flex: 1; min-width: 140px; }

input, select, button, .btn {
  font: inherit; padding: 8px 12px; border-radius: 6px;
  border: 1px solid var(--linha); background: var(--papel); color: var(--tinta);
}
button, .btn { background: var(--cor); color: var(--cor-texto); border-color: var(--cor); cursor: pointer; text-decoration: none; display: inline-block; }
.btn.discord { background: var(--discord); border-color: var(--discord); color: #fff; }
button.sec { background: transparent; color: var(--tinta); border-color: var(--linha); }
button.perigo { background: transparent; color: var(--perigo); border-color: var(--linha); }
:focus-visible { outline: 3px solid var(--cor); outline-offset: 2px; }

.avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; background: var(--linha); }
.tarefa { display: flex; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid var(--linha); flex-wrap: wrap; }
.tarefa .titulo { flex: 1; min-width: 120px; overflow-wrap: anywhere; }
.tarefa.feita .titulo { text-decoration: line-through; color: var(--suave); }
.tarefa input[type="checkbox"] { width: 20px; height: 20px; padding: 0; accent-color: var(--cor); }
.sub { margin-left: 28px; }
.codigo { font-family: Consolas, monospace; font-weight: 700; letter-spacing: .12em; }
.lista-item { justify-content: space-between; cursor: pointer; }
.lista-item:hover { background: var(--fundo); }
.vazio { color: var(--suave); }
code { overflow-wrap: anywhere; }

@media (max-width: 480px) { .sub { margin-left: 12px; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

.erro { color: var(--perigo); font-weight: 600; }