:root {
  --bg: #f4f6fb;
  --bg-grad1: rgba(37, 99, 235, 0.08);
  --bg-grad2: rgba(29, 78, 216, 0.08);
  --surface: #ffffff;
  --card: #ffffff;
  --primary: #2563eb;
  --primary-strong: #1d4ed8;
  --text: #0f172a;
  --muted: #64748b;
  --border: rgba(0, 0, 0, 0.08);
  --danger: #ef4444;
  --success: #22c55e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at 20% 20%, var(--bg-grad1), transparent 25%),
    radial-gradient(circle at 80% 0%, var(--bg-grad2), transparent 20%),
    var(--bg);
  color: var(--text);
  font-family: "Manrope", system-ui, -apple-system, sans-serif;
  min-height: 100vh;
}

.alt-login-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: linear-gradient(145deg, #eef2ff, #f8fafc);
  padding: 24px 16px;
}

.alt-login-card {
  width: min(520px, 94vw);
  padding: 26px 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  display: grid;
  gap: 12px;
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
}

.alt-login-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  padding: 10px 12px;
  border-radius: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  font-family: "Playfair Display", serif;
}

.brand-mark.large {
  padding: 14px 16px;
  font-size: 20px;
}

.brand-name {
  font-weight: 700;
  font-family: "Playfair Display", serif;
  letter-spacing: 0.6px;
}

.brand-sub {
  color: var(--muted);
  font-size: 12px;
}

h1 {
  margin: 6px 0;
  letter-spacing: -0.3px;
}

.lede {
  margin: 0 0 6px;
  color: var(--muted);
}

.form-grid {
  display: grid;
  gap: 12px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
}

input {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
  font-family: "Manrope", system-ui, -apple-system, sans-serif;
}

input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.25);
}

.btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 12px 14px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  border: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.helper {
  color: var(--muted);
  font-size: 12px;
  margin: 0;
}

.flash {
  display: grid;
  gap: 10px;
  margin-top: 4px;
}

.flash-item {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
}

.flash-item.success {
  border-color: var(--success);
  color: var(--success);
}

.flash-item.error {
  border-color: var(--danger);
  color: var(--danger);
}

@media (max-width: 540px) {
  .alt-login-card {
    padding: 20px 18px;
    border-radius: 14px;
  }
}