:root {
  --navy: #0B2545;
  --navy-700: #123159;
  --gold: #C79A3F;
  --gold-600: #b1863099;
  --ink: #1a1a1a;
  --muted: #5b6673;
  --line: #e3e7ec;
  --bg: #f4f6f9;
  --white: #ffffff;
  --danger: #b3261e;
  --radius: 12px;
  --shadow: 0 10px 40px rgba(11, 37, 69, 0.12);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 90% -10%, rgba(199, 154, 63, 0.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(11, 37, 69, 0.10), transparent 55%),
    var(--bg);
  color: var(--ink);
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 36px 32px;
}

.brand {
  text-align: center;
  margin-bottom: 28px;
}
.brand img {
  width: 190px;
  height: auto;
  margin: 0 auto 6px;
  display: block;
}
.brand .tagline {
  font-size: 12px;
  letter-spacing: 0.5px;
  color: var(--muted);
  text-transform: uppercase;
  font-weight: 600;
}

.app-name {
  text-align: center;
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin: 4px 0 2px;
}
.app-sub {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 24px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--navy);
  margin: 0 0 6px;
}
.field { margin-bottom: 18px; }

input[type="email"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 15px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(199, 154, 63, 0.18);
}

button.primary {
  width: 100%;
  padding: 13px;
  background: var(--navy);
  color: var(--white);
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.05s;
}
button.primary:hover { background: var(--navy-700); }
button.primary:active { transform: translateY(1px); }
button.primary:disabled { opacity: 0.6; cursor: not-allowed; }

.error {
  background: #fdecea;
  border: 1px solid #f5c6c2;
  color: var(--danger);
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 18px;
  display: none;
}
.error.show { display: block; }

.footer {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 12px;
  color: var(--muted);
}
.gold-rule {
  height: 3px;
  width: 54px;
  background: var(--gold);
  border-radius: 2px;
  margin: 0 auto 18px;
}