:root {
  --bg-main: #0c1c28;
  --card-bg: #122b3d;
  --card-border: rgba(255, 255, 255, 0.08);
  --gold: #d4af37;
  --gold-hover: #e5c358;
  --gold-glow: rgba(212, 175, 55, 0.25);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --input-bg: #091620;
  --input-border: #1e3d54;
  --input-focus: #38bdf8;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --danger-border: rgba(239, 68, 68, 0.35);
  --danger-text: #fca5a5;
}

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

body {
  min-height: 100vh;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(circle at 50% 20%, #17384f 0%, var(--bg-main) 70%);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 24px 16px;
}

.login-wrapper {
  width: 100%;
  max-width: 440px;
  margin: auto 0;
}

.brand-header {
  text-align: center;
  margin-bottom: 28px;
}

.brand-diamond {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(212, 175, 55, 0.05));
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: var(--gold);
  font-size: 28px;
  margin-bottom: 14px;
  box-shadow: 0 8px 24px var(--gold-glow);
}

.brand-header h1 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  text-transform: uppercase;
}

.brand-header h1 b {
  color: var(--gold);
}

.brand-header p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.login-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(12px);
}

.login-card-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #fff;
}

.login-card-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.3px;
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.form-control {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  color: #fff;
  font-size: 15px;
  transition: all 0.2s ease;
  outline: none;
}

.form-control:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px var(--gold-glow);
}

.form-control::placeholder {
  color: var(--text-muted);
}

.btn-submit {
  width: 100%;
  height: 48px;
  margin-top: 10px;
  background: linear-gradient(135deg, var(--gold) 0%, #b89326 100%);
  color: #0b151d;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit:hover {
  background: linear-gradient(135deg, var(--gold-hover) 0%, var(--gold) 100%);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px var(--gold-glow);
}

.btn-submit:active {
  transform: translateY(0);
}

.alert-erro {
  margin-top: 20px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--danger-bg);
  border: 1px solid var(--danger-border);
  color: var(--danger-text);
  font-size: 13px;
  line-height: 1.45;
}

.footer-bar {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  margin-top: 24px;
}

.footer-bar span {
  color: var(--text-secondary);
}