* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, sans-serif; background: #1a1a2e; color: #eee; min-height: 100vh; display: flex; align-items: center; justify-content: center; }
.login-screen { width: 100%; max-width: 420px; padding: 1rem; }
.login-card { background: #16213e; border-radius: 12px; padding: 2rem; box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.login-card h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.subtitle { color: #94a3b8; font-size: 0.9rem; margin: 0 0 1.5rem; }
.login-form label { display: block; margin-top: 1rem; margin-bottom: 0.25rem; font-size: 0.9rem; }
.login-form input { width: 100%; padding: 0.6rem 0.75rem; border: 1px solid #334155; border-radius: 6px; background: #0f172a; color: #fff; font-size: 1rem; }
.login-form input:focus { outline: none; border-color: #3b82f6; }
.login-form .error { color: #f87171; font-size: 0.85rem; margin-top: 0.5rem; }
.login-form .error.hidden { display: none; }
.login-form button { width: 100%; margin-top: 1.25rem; padding: 0.75rem; background: #2563eb; color: #fff; border: none; border-radius: 6px; font-size: 1rem; cursor: pointer; }
.login-form button:hover { background: #1d4ed8; }
.login-form button:disabled { opacity: 0.6; cursor: not-allowed; }
.hint { margin-top: 1rem; font-size: 0.85rem; color: #94a3b8; text-align: center; }
.hint a { color: #60a5fa; text-decoration: none; }
.hint a:hover { text-decoration: underline; }
.hidden { display: none !important; }