* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: #f5f6fa; color: #333; min-height: 100vh; }

/* top bar */
.topbar { background: #1a237e; color: #fff; padding: 12px 24px; display: flex; justify-content: space-between; align-items: center; }
.topbar h1 { font-size: 18px; font-weight: 500; }
.topbar .user-info { font-size: 14px; opacity: 0.9; }
.topbar a { color: #fff; text-decoration: none; margin-left: 16px; padding: 4px 12px; border-radius: 4px; }
.topbar a:hover { background: rgba(255,255,255,0.15); }
.topbar .logout { background: rgba(255,255,255,0.1); }

/* main container */
.container { max-width: 1200px; margin: 0 auto; padding: 24px; }

/* filter tabs */
.tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.tab { padding: 8px 20px; border: 1px solid #ddd; border-radius: 20px; cursor: pointer; font-size: 14px; background: #fff; transition: all 0.2s; }
.tab:hover { border-color: #1a237e; }
.tab.active { background: #1a237e; color: #fff; border-color: #1a237e; }

/* table */
table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 8px; overflow: hidden; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
th { background: #f0f0f5; padding: 12px 16px; text-align: left; font-weight: 600; font-size: 13px; color: #555; }
td { padding: 12px 16px; border-top: 1px solid #eee; font-size: 14px; }
tr:hover td { background: #f8f9ff; }
.rank-num { font-weight: 700; color: #1a237e; font-size: 16px; }
.rank-1 { color: #d4a017; }
.rank-2 { color: #b0b0b0; }
.rank-3 { color: #cd7f32; }
.score { font-weight: 600; }

/* status badges */
.status-preview { color: #e67e22; font-size: 12px; background: #fef3e2; padding: 2px 8px; border-radius: 10px; }
.status-final { color: #27ae60; font-size: 12px; background: #e8f8f0; padding: 2px 8px; border-radius: 10px; }

/* buttons */
.btn { display: inline-block; padding: 6px 16px; border-radius: 6px; text-decoration: none; font-size: 13px; cursor: pointer; border: none; transition: all 0.2s; }
.btn-primary { background: #4a90d9; color: #fff; }
.btn-primary:hover { background: #3a7bc8; }
.btn-sm { padding: 4px 12px; font-size: 12px; }
.btn-success { background: #27ae60; color: #000; }
.btn-success:hover { background: #219a52; }
.btn-pending { background: #d6eaf8; color: #e74c3c; border: 1px solid #aed6f1; }
.btn-pending:hover { background: #c5e0f5; }
.btn-warning { background: #e67e22; color: #fff; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-outline { background: transparent; border: 1px solid #4a90d9; color: #4a90d9; }

/* scoring form */
.score-form { background: #fff; border-radius: 8px; padding: 24px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); max-width: 600px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 4px; font-size: 14px; }
.form-group .dim-weight { font-size: 12px; color: #888; }
.form-group input[type="number"] { width: 120px; padding: 8px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 16px; }
.form-group .role-hint { font-size: 12px; color: #e67e22; margin-top: 4px; }
.form-actions { margin-top: 20px; display: flex; gap: 12px; }
.form-actions button { padding: 10px 24px; font-size: 15px; }

/* alerts */
.alert { padding: 12px 16px; border-radius: 6px; margin-bottom: 16px; font-size: 14px; }
.alert-success { background: #e8f8f0; color: #27ae60; border: 1px solid #c3e6d0; }
.alert-error { background: #fde8e8; color: #e74c3c; border: 1px solid #f5c6c6; }
.alert-info { background: #e3f2fd; color: #1565c0; border: 1px solid #bbdefb; }

/* login page */
.login-page { display: flex; justify-content: center; align-items: center; min-height: 100vh; background: #1a237e; }
.login-box { background: #fff; padding: 40px; border-radius: 8px; width: 380px; box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
.login-box h2 { text-align: center; margin-bottom: 24px; color: #1a237e; }
.login-box .form-group input[type="text"],
.login-box .form-group input[type="password"] { width: 100%; padding: 10px 12px; border: 1px solid #ddd; border-radius: 4px; font-size: 15px; }
.login-box button { width: 100%; padding: 12px; background: #1a237e; color: #fff; border: none; border-radius: 4px; font-size: 16px; cursor: pointer; }

/* detail page */
.detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.detail-card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.detail-card h3 { font-size: 15px; color: #555; margin-bottom: 12px; }

/* admin */
.admin-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.admin-card { background: #fff; border-radius: 8px; padding: 20px; box-shadow: 0 1px 3px rgba(0,0,0,0.08); }
.admin-card h3 { font-size: 16px; margin-bottom: 16px; color: #1a237e; }

/* modal */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.4); justify-content: center; align-items: center; z-index: 1000; }
.modal.active { display: flex; }
.modal-content { background: #fff; padding: 24px; border-radius: 8px; min-width: 400px; max-width: 600px; max-height: 80vh; overflow-y: auto; }
.modal-content h3 { margin-bottom: 16px; }

/* export */
.export-bar { display: flex; justify-content: flex-end; margin-bottom: 12px; }

/* responsive */
@media (max-width: 768px) {
  .container { padding: 12px; }
  table { font-size: 13px; }
  th, td { padding: 8px 10px; }
  .detail-grid, .admin-grid { grid-template-columns: 1fr; }
}