* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; display: flex; min-height: 100vh; background: #f5f5f5; }
.sidebar { width: 240px; background: #1a1a2e; color: #fff; padding: 24px 0; display: flex; flex-direction: column; }
.sidebar .logo { font-size: 20px; font-weight: bold; padding: 0 24px 24px; border-bottom: 1px solid #2a2a4e; margin-bottom: 16px; }
.sidebar ul { list-style: none; flex: 1; }
.sidebar li a { display: block; padding: 12px 24px; color: #ccc; text-decoration: none; transition: 0.2s; }
.sidebar li a:hover, .sidebar li a.active { background: #2a2a4e; color: #fff; }
.sidebar .logout-btn { display: block; padding: 12px 24px; color: #e74c3c; text-decoration: none; border-top: 1px solid #2a2a4e; margin-top: auto; cursor: pointer; transition: 0.2s; }
.sidebar .logout-btn:hover { background: #2a2a4e; color: #ff6b6b; }
.content { flex: 1; padding: 32px; }
.content header { margin-bottom: 24px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; }
.card { background: #fff; padding: 24px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.card h3 { font-size: 14px; color: #666; margin-bottom: 8px; }
.card p { font-size: 32px; font-weight: bold; color: #1a1a2e; }

/* Login page */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); }
.login-container { background: #fff; padding: 40px; border-radius: 12px; box-shadow: 0 8px 32px rgba(0,0,0,0.3); width: 100%; max-width: 400px; }
.login-container .logo { text-align: center; font-size: 24px; font-weight: bold; color: #1a1a2e; margin-bottom: 8px; }
.login-container .subtitle { text-align: center; color: #888; margin-bottom: 32px; font-size: 14px; }
.login-container .error-msg { background: #fbe9e7; color: #c62828; padding: 10px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; display: none; }
.login-container label { display: block; font-size: 14px; color: #555; margin-bottom: 4px; }
.login-container input[type="email"],
.login-container input[type="password"] { width: 100%; padding: 12px 16px; margin-bottom: 20px; border: 1px solid #ddd; border-radius: 6px; font-size: 15px; transition: border-color 0.2s; }
.login-container input:focus { outline: none; border-color: #1a1a2e; }
.login-container button { width: 100%; padding: 12px; background: #1a1a2e; color: #fff; border: none; border-radius: 6px; font-size: 16px; cursor: pointer; transition: background 0.2s; }
.login-container button:hover { background: #2a2a4e; }
.login-container button:disabled { opacity: 0.6; cursor: not-allowed; }
.login-container .login-footer { text-align: center; margin-top: 24px; font-size: 13px; color: #aaa; }