* {
  box-sizing: border-box;
}

:root {
  --bg1: #f8fbff;
  --bg2: #eef4ff;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #dbe5f1;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-soft: #eff6ff;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.10);
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: 'Prompt', sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.06), transparent 30%),
    linear-gradient(180deg, var(--bg1) 0%, var(--bg2) 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 430px;
  background: var(--card);
  border: 1px solid rgba(219, 229, 241, 0.95);
  border-radius: 22px;
  padding: 34px;
  box-shadow: var(--shadow);
}

.login-brand {
  text-align: center;
  margin-bottom: 24px;
}

.brand-logo {
  margin-bottom: 12px;
}

.brand-logo img {
  width: 280px;
  height: auto;
  display: block;
  margin: 0 auto;
  object-fit: contain;
}

.login-brand h1 {
  margin: 10px 0 6px;
  font-size: 26px;
  font-weight: 700;
  color: #0b1b44;
}

.login-brand p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.form-label {
  font-weight: 600;
  color: #334155;
  margin-bottom: 8px;
}

.form-hint {
  margin-top: 6px;
  font-size: 12px;
  color: #64748b;
}

.input-group-text {
  background: #f8fbff;
  border-color: var(--border);
  color: #64748b;
}

.form-control {
  height: 48px;
  border-color: var(--border);
}

.form-control:focus {
  box-shadow: 0 0 0 .2rem rgba(37, 99, 235, 0.10);
  border-color: #93c5fd;
}

.btn-outline-secondary {
  border-color: var(--border);
}

.btn-primary {
  height: 48px;
  font-weight: 600;
  border-radius: 12px;
  background: var(--primary);
  border: none;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.20);
}

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

#alertBox {
  border-radius: 12px;
}

.login-footer {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: #94a3b8;
}

.spinner-border {
  vertical-align: middle;
}

@media (max-width: 576px) {
  .login-page {
    padding: 16px;
  }

  .login-card {
    padding: 24px;
    border-radius: 18px;
  }

  .brand-logo img {
    width: 76px;
  }

  .login-brand h1 {
    font-size: 22px;
  }
}