:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --texto: #1d2330;
  --suave: #5b6475;
  --borda: #dde1e8;
  --acento: #2457d6;
  --acento-escuro: #1a43a8;
  --erro-bg: #fdecec;
  --erro: #a32121;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--texto);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header.topo {
  background: var(--card);
  border-bottom: 1px solid var(--borda);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.topo .marca { font-weight: 700; }
header.topo nav a { margin-left: 16px; color: var(--acento); text-decoration: none; }
header.topo nav a:hover { text-decoration: underline; }

header.topo nav a.btn-menu {
  background: var(--acento);
  color: #fff;
  padding: 7px 16px;
  border-radius: 8px;
}

header.topo nav a.btn-menu:hover { background: var(--acento-escuro); text-decoration: none; }

main {
  flex: 1;
  width: 100%;
  max-width: 560px;
  margin: 48px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--borda);
  border-radius: 12px;
  padding: 28px;
}

main.largo { max-width: 960px; }

h1 { margin-top: 0; font-size: 1.5rem; }
h2 { font-size: 1.2rem; margin: 36px 0 16px; }

/* Cards de dicas da página inicial */
.grade-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.card-dica { padding: 22px; }
.card-dica .icone { font-size: 1.8rem; }
.card-dica h3 { margin: 10px 0 6px; font-size: 1.05rem; }
.card-dica p { margin: 0; line-height: 1.5; }
p.suave { color: var(--suave); }

label { display: block; margin: 16px 0 6px; font-weight: 600; font-size: .9rem; }

input[type="text"], input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--borda);
  border-radius: 8px;
  font-size: 1rem;
}

input:focus { outline: 2px solid var(--acento); outline-offset: 1px; }

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 18px;
  background: var(--acento);
  color: #fff;
  border: 0;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--acento-escuro); }

.erro {
  background: var(--erro-bg);
  color: var(--erro);
  border-radius: 8px;
  padding: 10px 12px;
  margin-bottom: 8px;
}

.faixa-homolog {
  background: #b45309;
  color: #fff;
  text-align: center;
  padding: 6px 12px;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .04em;
}

footer { text-align: center; color: var(--suave); font-size: .8rem; padding: 16px; }