:root {
  --eq-blue: #29ABE2;
  --eq-blue-dark: #1a8ab8;
  --eq-blue-light: #e8f7fd;
  --eq-teal: #0db8a0;
  --eq-navy: #1a3a5c;
  --eq-bg: #f4faff;
  --eq-border: #d0e8f5;
  --eq-muted: #6b7fa3;
  --eq-red: #ef4444;
  --eq-red-bg: #fee2e2;
  --eq-green-bg: #d1fae5;
  --eq-green-text: #065f46;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--eq-bg);
  color: var(--eq-navy);
}

a { color: var(--eq-blue); }

/* ---------- tela de login ---------- */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--eq-blue) 0%, var(--eq-teal) 100%);
  padding: 24px;
}

.auth-card {
  background: white;
  border-radius: 20px;
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.auth-card h1 {
  text-align: center;
  font-size: 22px;
  margin: 0 0 4px;
}

.auth-card .subtitle {
  text-align: center;
  color: var(--eq-muted);
  font-size: 14px;
  margin: 0 0 24px;
}

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--eq-muted);
  margin-bottom: 4px;
}

input[type=text], input[type=email], input[type=password], select {
  width: 100%;
  border: 1.5px solid var(--eq-border);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--eq-navy);
  background: white;
  outline: none;
}
input:focus, select:focus { border-color: var(--eq-blue); }

.btn-primary {
  width: 100%;
  background: var(--eq-blue);
  color: white;
  border: none;
  border-radius: 8px;
  padding: 12px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
}
.btn-primary:hover { background: var(--eq-blue-dark); }

.alert {
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert-error   { background: var(--eq-red-bg); color: var(--eq-red); }
.alert-success { background: var(--eq-green-bg); color: var(--eq-green-text); }

.auth-links { text-align: center; font-size: 13px; margin-top: 16px; color: var(--eq-muted); }

/* ---------- área logada (admin/professor/aluno) ---------- */
.shell { display: flex; min-height: 100vh; }

.sidebar {
  width: 230px;
  flex-shrink: 0;
  background: white;
  border-right: 1px solid var(--eq-border);
  padding: 24px 16px;
}

.sidebar .role-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--eq-blue);
  text-align: center;
  margin-bottom: 20px;
}

.sidebar .user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--eq-navy);
  margin-bottom: 16px;
}

.sidebar a.logout {
  display: inline-block;
  color: var(--eq-red);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

main.content {
  flex: 1;
  padding: 32px;
}

.card {
  background: white;
  border-radius: 12px;
  border: 1px solid var(--eq-border);
  box-shadow: 0 1px 4px rgba(26,58,92,0.08);
  padding: 24px;
}