:root {
  color-scheme: light dark;
  --bg: #f6f6f4;
  --surface: #ffffff;
  --surface-2: #f0f0ee;
  --border: #e2e2df;
  --text: #1a1a1a;
  --text-muted: #666660;
  --primary: #1f7a3f;
  --primary-hover: #175f31;
  --primary-soft: #eaf5ee;
  --whats: #25D366;
  --whats-hover: #1ea952;
  --danger-bg: #fdeaea;
  --danger-border: #f5b5b5;
  --danger-text: #8a1f1f;
  --warn-bg: #fff8e1;
  --warn-border: #ffe0a3;
  --warn-text: #7a5b00;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(0,0,0,0.04), 0 1px 8px rgba(0,0,0,0.03);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171a;
    --surface: #1d2024;
    --surface-2: #23262b;
    --border: #2e3238;
    --text: #eceeef;
    --text-muted: #9aa0a6;
    --primary: #34a35f;
    --primary-hover: #3fbb6d;
    --primary-soft: #163823;
    --whats: #25D366;
    --whats-hover: #2fe07a;
    --danger-bg: #3a2020;
    --danger-border: #6b2b2b;
    --danger-text: #ffb3b3;
    --warn-bg: #3a3216;
    --warn-border: #6b5b26;
    --warn-text: #ffd97a;
    --shadow: 0 1px 2px rgba(0,0,0,0.3), 0 1px 8px rgba(0,0,0,0.25);
  }
}
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  line-height: 1.45;
}
a { color: var(--primary); }

/* Cabeçalho compartilhado por todos os módulos */
.cabecalho {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.cabecalho-conteudo {
  max-width: none; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
}
.marca { font-weight: 700; font-size: 1rem; text-decoration: none; color: var(--text); }
.cabecalho nav { display: flex; gap: 18px; flex-wrap: wrap; }
.cabecalho nav a {
  text-decoration: none; color: var(--text-muted); font-size: 0.88rem; font-weight: 500;
}
.cabecalho nav a:hover, .cabecalho nav a.ativo { color: var(--primary); }
.usuario-info {
  margin-left: auto; display: flex; align-items: center; gap: 14px;
  font-size: 0.85rem; color: var(--text-muted);
}
.usuario-info a { text-decoration: none; color: var(--text-muted); }
.usuario-info a:hover { color: var(--primary); }
.usuario-info form { margin: 0; }
.botao-link {
  background: none; border: none; padding: 0; margin: 0; font: inherit;
  color: var(--text-muted); cursor: pointer; font-weight: 500;
}
.botao-link:hover { background: none; color: var(--primary); text-decoration: underline; }

main.container { max-width: none; margin: 0 auto; padding: 28px 24px 64px; }

.topo { margin-bottom: 22px; }
.topo h1 { font-size: 1.5rem; margin: 0 0 4px; letter-spacing: -0.01em; }
.topo p.sub { margin: 0; color: var(--text-muted); font-size: 0.88rem; }

.cartao {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
}
.erro {
  background: var(--danger-bg); border: 1px solid var(--danger-border); color: var(--danger-text);
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 20px; white-space: pre-wrap;
  font-size: 0.88rem;
}
.aviso {
  background: var(--warn-bg); border: 1px solid var(--warn-border); color: var(--warn-text);
  padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 20px; font-size: 0.85rem;
}
button {
  background: var(--primary); color: #fff; border: none; padding: 11px 20px;
  border-radius: var(--radius-sm); font-size: 0.92rem; font-weight: 600; cursor: pointer;
  transition: background 0.15s ease;
}
button:hover { background: var(--primary-hover); }

/* Painel inicial (lista de módulos) */
.grade-modulos {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px;
}
.cartao-modulo {
  display: block; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; text-decoration: none; color: var(--text); box-shadow: var(--shadow);
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.cartao-modulo:hover { border-color: var(--primary); transform: translateY(-1px); }
.cartao-modulo h2 { font-size: 1rem; margin: 0 0 6px; }
.cartao-modulo p { margin: 0; font-size: 0.85rem; color: var(--text-muted); }