:root {
  --dark: #0a2f33;
  --primary: #028090;
  --second: #00a896;
  --accent: #02c39a;
  --panel: #eaf6f5;
  --text: #1b2b2e;
  --muted: #5c7679;
  --amber: #e0a458;
  --danger: #c0392b;
  --border: #d8e9e8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Calibri, Arial, sans-serif;
  color: var(--text);
  background: #f7fafa;
}

a { color: var(--primary); }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ---------- Barra superior ---------- */
.topbar {
  background: var(--dark);
  color: #fff;
}
.topbar-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  height: 58px;
}
.brand {
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  font-size: 16px;
  white-space: nowrap;
}
.mainnav { display: flex; gap: 4px; flex: 1; flex-wrap: wrap; }
.mainnav a {
  color: #cfeeea;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 14px;
}
.mainnav a:hover { background: rgba(255,255,255,.1); color: #fff; }
.usermenu { display: flex; align-items: center; gap: 12px; font-size: 14px; color: #cfeeea; white-space: nowrap; }
.btn-link { color: #fff; text-decoration: underline; }

/* ---------- Cabeçalhos de página ---------- */
h1 { font-size: 26px; margin: 0 0 4px; }
h2 { font-size: 19px; margin: 28px 0 12px; }
.subtitle { color: var(--muted); margin: 0 0 20px; }
.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}

/* ---------- Cartões / caixas ---------- */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 18px;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}
.stat {
  background: var(--panel);
  border-radius: 10px;
  padding: 16px 18px;
}
.stat .n { font-size: 28px; font-weight: 700; color: var(--primary); display: block; }
.stat .l { font-size: 13px; color: var(--muted); }

/* ---------- Tabelas ---------- */
table { width: 100%; border-collapse: collapse; background: #fff; }
table.list { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { background: var(--primary); color: #fff; font-weight: 600; }
tr:last-child td { border-bottom: none; }
tr:nth-child(even) td { background: #fafdfd; }
td.actions { white-space: nowrap; text-align: right; }
td.actions a { margin-left: 10px; font-size: 13px; }

/* ---------- Formulários ---------- */
label { display: block; font-weight: 600; font-size: 13px; margin: 14px 0 5px; }
input[type=text], input[type=email], input[type=password], input[type=date],
select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid #c7d6d5;
  border-radius: 7px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
textarea { min-height: 140px; font-family: "Courier New", monospace; font-size: 13.5px; }
textarea.rich { font-family: inherit; min-height: 110px; }
.form-help { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.form-row { display: flex; gap: 16px; flex-wrap: wrap; }
.form-row > div { flex: 1; min-width: 200px; }
fieldset { border: 1px solid var(--border); border-radius: 8px; margin: 14px 0; padding: 10px 14px; }
legend { font-weight: 600; font-size: 13px; padding: 0 6px; }
.checkbox-row { display: flex; align-items: center; gap: 8px; margin: 10px 0; }
.checkbox-row input { width: auto; }
.checkbox-row label { margin: 0; font-weight: 400; }

/* ---------- Botões ---------- */
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 10px 18px;
  border-radius: 7px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: #026e7b; }
.btn.secondary { background: #fff; color: var(--primary); border: 1px solid var(--primary); }
.btn.danger { background: var(--danger); }
.btn.small { padding: 6px 12px; font-size: 13px; }
.btn-bar { display: flex; gap: 10px; margin-top: 18px; flex-wrap: wrap; }

/* ---------- Etiquetas / badges ---------- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11.5px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}
.badge-exercicio { background: var(--accent); color: var(--dark); }
.badge-questao { background: var(--accent); color: var(--dark); }
.badge-ficha { background: var(--amber); color: var(--dark); }
.badge-grupo { background: var(--second); }
.badge-avaliacao { background: var(--dark); }
.badge-resolucao { background: var(--second); }
.badge-muted { background: #e4eceb; color: var(--muted); }

/* ---------- Mensagens ---------- */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 18px; font-size: 14px; }
.flash-ok { background: #e2f6ee; color: #0d6b45; border: 1px solid #b9e6d1; }
.flash-erro { background: #fdecea; color: var(--danger); border: 1px solid #f5c6c0; }

/* ---------- Login ---------- */
.login-wrap {
  max-width: 380px;
  margin: 10vh auto;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}
.login-wrap h1 { text-align: center; color: var(--dark); }
.login-wrap .subtitle { text-align: center; }

/* ---------- Conteúdo de exercícios (enunciado/resolução) ---------- */
.exercicio-corpo pre {
  background: var(--dark);
  color: #e7f7f3;
  padding: 14px 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.5;
}
.exercicio-corpo code { font-family: "Courier New", monospace; }
.exercicio-corpo :not(pre) > code {
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 4px;
}
.bloco-resolucao {
  border-left: 4px solid var(--second);
  background: #f3fbf9;
  padding: 4px 18px;
  margin-top: 16px;
  border-radius: 0 8px 8px 0;
}
.bloco-resolucao h3 { color: var(--second); margin-top: 14px; }

/* ---------- Impressão ---------- */
@media print {
  .no-print { display: none !important; }
  body { background: #fff; }
  .container { max-width: none; padding: 0; }
  .print-page { page-break-after: always; }
  .print-page:last-child { page-break-after: auto; }
}
.print-toolbar {
  position: sticky;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  z-index: 10;
}
.print-doc { max-width: 800px; margin: 0 auto; padding: 30px 20px; }
.print-doc .cabecalho { border-bottom: 2px solid var(--dark); padding-bottom: 10px; margin-bottom: 20px; }
.print-doc .cabecalho .escola { font-size: 12px; color: var(--muted); }
.print-doc .cabecalho h1 { font-size: 20px; margin: 4px 0; }
.print-doc .campos-aluno { display: flex; gap: 30px; margin: 16px 0 24px; font-size: 13px; }
.print-doc .campos-aluno span { border-bottom: 1px solid #999; display: inline-block; min-width: 160px; }

.empty-state { text-align: center; padding: 50px 20px; color: var(--muted); }