:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --text: #132238;
  --muted: #5d6b80;
  --line: #d7e0ea;
  --primary: #0f5bd8;
  --primary-deep: #0b3f94;
  --danger: #c33939;
  --radius: 22px;
  --shadow: 0 20px 45px rgba(15, 40, 74, 0.08);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Segoe UI, Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(15,91,216,0.12), transparent 30%),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 100%);
}

.login-body { min-height: 100vh; }
.login-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.1fr 460px;
  gap: 26px;
  align-items: stretch;
  padding: 32px;
}

.login-hero, .login-card {
  background: rgba(255,255,255,0.86);
  border: 1px solid rgba(255,255,255,0.75);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.login-hero {
  padding: 56px;
  display: grid;
  align-content: end;
  background: linear-gradient(160deg, #102746, #0f5bd8);
  color: #fff;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.72rem;
  color: rgba(255,255,255,0.78);
}

.hero-copy { color: rgba(255,255,255,0.78); }
.login-hero h1 {
  font-size: 3rem;
  line-height: 1.05;
  margin: 12px 0;
}

.login-card {
  padding: 42px;
  display: grid;
  align-content: center;
}

.login-logo { width: 90px; margin-bottom: 20px; }
.login-card h2 { margin: 0; }
.login-subtitle { color: var(--muted); }

.btn {
  border: 0;
  border-radius: 14px;
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #2c79f5);
  color: #fff;
}

.btn-block {
  width: 100%;
  text-align: center;
  display: inline-block;
}

.flash-stack { display: grid; gap: 10px; margin: 0 0 14px; }
.flash {
  padding: 14px 16px;
  border-radius: 14px;
}
.flash-error { background: #fdeaea; color: var(--danger); }

code {
  font-family: Consolas, monospace;
  font-size: 0.92em;
}

@media (max-width: 1100px) {
  .login-shell { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .login-shell { padding: 16px; }
  .login-hero { min-height: 260px; padding: 28px; }
  .login-card { padding: 28px; }
  .login-hero h1 { font-size: 2.2rem; }
}