:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --border: #334155;
  --error: #ef4444;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, system-ui, sans-serif;
  background: linear-gradient(135deg, var(--bg), #1e293b);
  color: var(--text);
  display: grid;
  place-items: center;
}

.login-shell { width: 100%; max-width: 380px; padding: 24px; }

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.35);
}

.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.brand-mark {
  background: var(--accent);
  color: #1e293b;
  font-weight: 800;
  border-radius: 10px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  font-size: 18px;
}
.brand h1 { font-size: 18px; margin: 0; font-weight: 600; letter-spacing: 0.2px; }

label { font-size: 13px; color: var(--muted); }

input[type="password"] {
  background: #0b1220;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 16px;
  outline: none;
  transition: border-color 120ms;
}
input[type="password"]:focus { border-color: var(--accent); }

button {
  margin-top: 6px;
  background: var(--accent);
  color: #1e293b;
  border: none;
  font-weight: 700;
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 15px;
  transition: background 120ms;
}
button:hover { background: var(--accent-hover); }

.error {
  color: var(--error);
  font-size: 13px;
  margin: 4px 0 0;
}