*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary:    #0D9488;
  --primary-dk: #0F766E;
  --success:    #16A34A;
  --danger:     #DC2626;
  --bg:         #F0FDFA;
  --card-bg:    #FFFFFF;
  --text:       #1E293B;
  --muted:      #64748B;
  --border:     #CBD5E1;
  --radius:     14px;
  --shadow:     0 4px 24px rgba(0,0,0,.10);
}

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.login-bg {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dk) 100%);
  padding: 1rem;
}

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 400px;
}

.login-header {
  text-align: center;
  margin-bottom: 2rem;
}

.login-icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 0.75rem;
}

.login-header h1 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.25rem;
}

.login-sub {
  color: var(--muted);
  font-size: 0.9rem;
}

.alert-erro {
  background: #FEF2F2;
  border: 1px solid #FECACA;
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color 0.15s;
  outline: none;
}

.form-group input:focus {
  border-color: var(--primary);
}

.btn-primary {
  width: 100%;
  padding: 0.75rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dk));
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  font-family: inherit;
  transition: opacity 0.15s;
}

.btn-primary:hover { opacity: 0.9; }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.hidden { display: none !important; }