/* =====================================================
   ACTIVITY ARENA — Base Styles & Design System
   ===================================================== */

   @import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;600;700;900&family=Noto+Sans+KR:wght@300;400;500;700&family=JetBrains+Mono:wght@400;600&display=swap');

   /* ── CSS Variables ── */
   :root {
     /* Core Palette */
     --color-bg:         #080c14;
     --color-surface:    #0d1421;
     --color-surface-2:  #111b2e;
     --color-surface-3:  #172035;
     --color-border:     rgba(0, 200, 255, 0.15);
     --color-border-hot: rgba(0, 200, 255, 0.5);
   
     /* Accent Colors */
     --color-cyan:       #00c8ff;
     --color-cyan-dim:   rgba(0, 200, 255, 0.6);
     --color-cyan-glow:  rgba(0, 200, 255, 0.15);
     --color-orange:     #ff6b35;
     --color-orange-dim: rgba(255, 107, 53, 0.6);
     --color-green:      #00ff88;
     --color-green-dim:  rgba(0, 255, 136, 0.6);
     --color-yellow:     #ffd700;
     --color-red:        #ff3d5c;
     --color-purple:     #8b5cf6;
   
     /* Team Colors */
     --team-1: #00c8ff;
     --team-2: #ff6b35;
     --team-3: #00ff88;
     --team-4: #ffd700;
     --team-5: #ff3d5c;
     --team-6: #8b5cf6;
   
     /* Text */
     --text-primary:   #e8f4fd;
     --text-secondary: rgba(232, 244, 253, 0.65);
     --text-muted:     rgba(232, 244, 253, 0.35);
   
     /* Typography */
     --font-display: 'Orbitron', monospace;
     --font-body:    'Noto Sans KR', sans-serif;
     --font-mono:    'JetBrains Mono', monospace;
   
     /* Spacing */
     --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px;
     --sp-4: 16px; --sp-5: 20px; --sp-6: 24px;
     --sp-8: 32px; --sp-10: 40px; --sp-12: 48px;
   
     /* Radius */
     --radius-sm: 4px;  --radius-md: 8px;
     --radius-lg: 12px; --radius-xl: 20px;
   
     /* Transitions */
     --tr-fast:   150ms ease;
     --tr-normal: 250ms ease;
     --tr-slow:   400ms ease;
   
     /* Shadows */
     --shadow-cyan:   0 0 20px rgba(0, 200, 255, 0.3);
     --shadow-orange: 0 0 20px rgba(255, 107, 53, 0.3);
     --shadow-card:   0 4px 24px rgba(0, 0, 0, 0.4);
   
     /* Sidebar */
     --sidebar-width: 260px;
     --topbar-height: 60px;
   }
   
   /* ── Reset ── */
   *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
   html { font-size: 14px; scroll-behavior: smooth; }
   body {
     background: var(--color-bg);
     color: var(--text-primary);
     font-family: var(--font-body);
     line-height: 1.6;
     overflow-x: hidden;
     min-height: 100vh;
   }
   img { max-width: 100%; display: block; }
   a { color: var(--color-cyan); text-decoration: none; }
   a:hover { color: #fff; }
   button { cursor: pointer; font-family: var(--font-body); }
   input, select, textarea { font-family: var(--font-body); }
   
   /* ── Background Grid Texture ── */
   body::before {
     content: '';
     position: fixed; inset: 0;
     background-image:
       linear-gradient(rgba(0,200,255,0.03) 1px, transparent 1px),
       linear-gradient(90deg, rgba(0,200,255,0.03) 1px, transparent 1px);
     background-size: 40px 40px;
     pointer-events: none;
     z-index: 0;
   }
   
   /* ── Scrollbar ── */
   ::-webkit-scrollbar { width: 6px; height: 6px; }
   ::-webkit-scrollbar-track { background: var(--color-surface); }
   ::-webkit-scrollbar-thumb { background: rgba(0,200,255,0.3); border-radius: 3px; }
   ::-webkit-scrollbar-thumb:hover { background: var(--color-cyan); }
   
   /* ── Layout Shell ── */
   .app-shell {
     display: flex;
     min-height: 100vh;
     position: relative;
     z-index: 1;
   }
   
   /* ── Sidebar ── */
   .sidebar {
     width: var(--sidebar-width);
     background: var(--color-surface);
     border-right: 1px solid var(--color-border);
     display: flex;
     flex-direction: column;
     position: fixed;
     top: 0; left: 0; bottom: 0;
     z-index: 100;
     transition: transform var(--tr-normal);
   }
   .sidebar-logo {
     padding: var(--sp-6) var(--sp-5);
     border-bottom: 1px solid var(--color-border);
     display: flex; align-items: center; gap: var(--sp-3);
   }
   .sidebar-logo .logo-icon {
     width: 36px; height: 36px;
     background: linear-gradient(135deg, var(--color-cyan), var(--color-orange));
     border-radius: var(--radius-md);
     display: flex; align-items: center; justify-content: center;
     font-size: 18px;
   }
   .sidebar-logo .logo-text {
     font-family: var(--font-display);
     font-size: 11px; font-weight: 700;
     letter-spacing: 2px;
     color: var(--color-cyan);
     line-height: 1.2;
   }
   .sidebar-logo .logo-sub {
     font-size: 9px; color: var(--text-muted);
     letter-spacing: 1px;
   }
   .sidebar-game-info {
     padding: var(--sp-4) var(--sp-5);
     border-bottom: 1px solid var(--color-border);
     background: var(--color-surface-2);
   }
   .sidebar-game-info .game-badge {
     display: inline-flex; align-items: center; gap: var(--sp-2);
     background: var(--color-cyan-glow);
     border: 1px solid var(--color-border-hot);
     border-radius: 20px;
     padding: 3px 10px;
     font-size: 11px; color: var(--color-cyan);
     font-family: var(--font-display);
     font-weight: 600; letter-spacing: 1px;
     margin-bottom: var(--sp-2);
   }
   .sidebar-game-info .game-badge .dot {
     width: 6px; height: 6px;
     border-radius: 50%;
     background: var(--color-green);
     box-shadow: 0 0 6px var(--color-green);
     animation: pulse 2s infinite;
   }
   .sidebar-game-info .game-name {
     font-size: 13px; font-weight: 700; color: var(--text-primary);
     white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
   }
   .sidebar-nav { flex: 1; overflow-y: auto; padding: var(--sp-4) 0; }
   .nav-section-label {
     padding: var(--sp-3) var(--sp-5) var(--sp-2);
     font-size: 10px; font-weight: 600;
     color: var(--text-muted);
     letter-spacing: 2px; text-transform: uppercase;
     font-family: var(--font-display);
   }
   .nav-item,
   .sidebar-link {
     display: flex; align-items: center; gap: var(--sp-3);
     padding: 10px var(--sp-5);
     color: var(--text-secondary);
     font-size: 13px; font-weight: 500;
     transition: all var(--tr-fast);
     position: relative; cursor: pointer;
     border: none; background: none; width: 100%; text-align: left;
     text-decoration: none;
   }
   .nav-item .nav-icon,
   .sidebar-link .sidebar-link-icon { font-size: 16px; width: 20px; flex-shrink: 0; }
   .nav-item .nav-badge {
     margin-left: auto;
     background: var(--color-orange);
     color: #fff;
     font-size: 10px; font-weight: 700;
     padding: 1px 6px; border-radius: 10px;
   }
   .nav-item:hover,
   .sidebar-link:hover { color: var(--text-primary); background: var(--color-surface-2); }
   .nav-item.active,
   .sidebar-link.active {
     color: var(--color-cyan);
     background: var(--color-cyan-glow);
   }
   .nav-item.active::before,
   .sidebar-link.active::before {
     content: '';
     position: absolute; left: 0; top: 0; bottom: 0;
     width: 3px;
     background: var(--color-cyan);
     box-shadow: var(--shadow-cyan);
   }
   .sidebar-footer {
     padding: var(--sp-4) var(--sp-5);
     border-top: 1px solid var(--color-border);
   }
   
   /* ── Top Bar ── */
   .topbar {
     height: var(--topbar-height);
     background: rgba(8, 12, 20, 0.9);
     border-bottom: 1px solid var(--color-border);
     backdrop-filter: blur(12px);
     display: flex; align-items: center;
     padding: 0 var(--sp-6);
     gap: var(--sp-4);
     position: sticky; top: 0; z-index: 50;
   }
   .topbar-title {
     font-family: var(--font-display);
     font-size: 14px; font-weight: 600;
     color: var(--text-primary);
     letter-spacing: 1px;
   }
   .topbar-spacer { flex: 1; }
   
   /* ── Main Content ── */
   .main-content {
     margin-left: var(--sidebar-width);
     flex: 1;
     display: flex; flex-direction: column;
     min-height: 100vh;
   }
   .page-body {
     flex: 1;
     padding: var(--sp-6);
     max-width: 1400px;
     margin: 0 auto;
     width: 100%;
   }
   
   /* ── Cards ── */
   .card {
     background: var(--color-surface);
     border: 1px solid var(--color-border);
     border-radius: var(--radius-lg);
     padding: var(--sp-6);
     box-shadow: var(--shadow-card);
   }
   .card-header {
     display: flex; align-items: center; justify-content: space-between;
     margin-bottom: var(--sp-5);
     padding-bottom: var(--sp-4);
     border-bottom: 1px solid var(--color-border);
   }
   .card-title {
     font-family: var(--font-display);
     font-size: 13px; font-weight: 600;
     color: var(--text-primary);
     letter-spacing: 1px;
   }
   .card-glow {
     box-shadow: var(--shadow-card), 0 0 0 1px var(--color-border-hot),
                 inset 0 0 40px rgba(0,200,255,0.03);
   }
   
   /* ── Buttons ── */
   .btn {
     display: inline-flex; align-items: center; justify-content: center;
     gap: var(--sp-2);
     padding: 8px 18px;
     border-radius: var(--radius-md);
     font-size: 13px; font-weight: 600;
     transition: all var(--tr-fast);
     border: none; cursor: pointer;
     font-family: var(--font-body);
     letter-spacing: 0.5px;
     white-space: nowrap;
   }
   .btn-primary {
     background: var(--color-cyan);
     color: var(--color-bg);
   }
   .btn-primary:hover {
     background: #fff;
     box-shadow: var(--shadow-cyan);
   }
   .btn-ghost {
     background: transparent;
     border: 1px solid var(--color-border-hot);
     color: var(--color-cyan);
   }
   .btn-ghost:hover { background: var(--color-cyan-glow); }
   .btn-danger {
     background: var(--color-red);
     color: #fff;
   }
   .btn-danger:hover { filter: brightness(1.15); }
   .btn-success {
     background: var(--color-green);
     color: var(--color-bg);
   }
   .btn-warning {
     background: var(--color-orange);
     color: #fff;
   }
   .btn-sm { padding: 5px 12px; font-size: 12px; }
   .btn-lg { padding: 12px 28px; font-size: 15px; }
   .btn-icon { padding: 8px; width: 36px; height: 36px; }
   .btn:disabled { opacity: 0.4; cursor: not-allowed; }
   
   /* ── Form Controls ── */
   .form-group { margin-bottom: var(--sp-5); }
   .form-label {
     display: block;
     font-size: 12px; font-weight: 600;
     color: var(--text-secondary);
     margin-bottom: var(--sp-2);
     letter-spacing: 0.5px;
     text-transform: uppercase;
   }
   .form-control,
   .form-input,
   .form-select,
   .form-textarea {
     width: 100%;
     background: var(--color-surface-2);
     border: 1px solid var(--color-border);
     border-radius: var(--radius-md);
     padding: 10px 14px;
     color: var(--text-primary);
     font-size: 14px;
     font-family: inherit;
     transition: border-color var(--tr-fast), box-shadow var(--tr-fast);
     outline: none;
   }
   .form-control:focus,
   .form-input:focus,
   .form-select:focus,
   .form-textarea:focus {
     border-color: var(--color-cyan);
     box-shadow: 0 0 0 3px rgba(0,200,255,0.1);
   }
   .form-control::placeholder,
   .form-input::placeholder,
   .form-textarea::placeholder { color: var(--text-muted); }
   select.form-control,
   .form-select { cursor: pointer; }
   textarea.form-control,
   .form-textarea { resize: vertical; min-height: 80px; }
   .form-hint {
     font-size: 12px; color: var(--text-muted);
     margin-top: var(--sp-1);
   }
   .input-group {
     display: flex; gap: var(--sp-2);
   }
   .input-group .form-control,
   .input-group .form-input { flex: 1; }
   
   /* ── Toggle Switch ── */
   .toggle-wrap { display: flex; align-items: center; gap: var(--sp-3); }
   .toggle {
     position: relative; width: 44px; height: 24px;
     flex-shrink: 0;
   }
   .toggle input { opacity: 0; width: 0; height: 0; }
   .toggle-slider {
     position: absolute; inset: 0;
     background: var(--color-surface-3);
     border: 1px solid var(--color-border);
     border-radius: 12px;
     cursor: pointer;
     transition: all var(--tr-normal);
   }
   .toggle-slider::before {
     content: '';
     position: absolute;
     width: 16px; height: 16px;
     left: 3px; top: 3px;
     background: var(--text-muted);
     border-radius: 50%;
     transition: all var(--tr-normal);
   }
   .toggle input:checked + .toggle-slider {
     background: rgba(0,200,255,0.2);
     border-color: var(--color-cyan);
   }
   .toggle input:checked + .toggle-slider::before {
     transform: translateX(20px);
     background: var(--color-cyan);
     box-shadow: 0 0 8px var(--color-cyan);
   }
   
   /* ── Stats / Metric Cards ── */
   .stat-grid {
     display: grid;
     grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
     gap: var(--sp-4);
   }
   .stat-card {
     background: var(--color-surface);
     border: 1px solid var(--color-border);
     border-radius: var(--radius-lg);
     padding: var(--sp-5);
     position: relative; overflow: hidden;
   }
   .stat-card::before {
     content: '';
     position: absolute; top: 0; left: 0; right: 0;
     height: 2px;
     background: var(--accent, var(--color-cyan));
   }
   .stat-label {
     font-size: 11px; color: var(--text-muted);
     letter-spacing: 1px; text-transform: uppercase;
     margin-bottom: var(--sp-2);
     font-family: var(--font-display);
   }
   .stat-value {
     font-family: var(--font-display);
     font-size: 28px; font-weight: 700;
     color: var(--text-primary);
     line-height: 1;
   }
   .stat-sub {
     font-size: 12px; color: var(--text-muted);
     margin-top: var(--sp-1);
   }
   
   /* ── Table ── */
   .data-table {
     width: 100%; border-collapse: collapse;
   }
   .data-table th {
     padding: 10px 14px;
     background: var(--color-surface-2);
     color: var(--text-muted);
     font-size: 11px; font-weight: 600;
     text-transform: uppercase; letter-spacing: 1px;
     text-align: left;
     border-bottom: 1px solid var(--color-border);
     font-family: var(--font-display);
   }
   .data-table td {
     padding: 12px 14px;
     border-bottom: 1px solid rgba(0,200,255,0.06);
     font-size: 13px; color: var(--text-secondary);
     vertical-align: middle;
   }
   .data-table tr:hover td { background: var(--color-surface-2); }
   .data-table tr:last-child td { border-bottom: none; }
   
   /* ── Badges ── */
   .badge {
     display: inline-flex; align-items: center;
     padding: 3px 10px;
     border-radius: 20px;
     font-size: 11px; font-weight: 700;
     letter-spacing: 0.5px;
   }
   .badge-cyan { background: rgba(0,200,255,0.15); color: var(--color-cyan); }
   .badge-orange { background: rgba(255,107,53,0.15); color: var(--color-orange); }
   .badge-green { background: rgba(0,255,136,0.15); color: var(--color-green); }
   .badge-red { background: rgba(255,61,92,0.15); color: var(--color-red); }
   .badge-yellow { background: rgba(255,215,0,0.15); color: var(--color-yellow); }
   .badge-purple { background: rgba(139,92,246,0.15); color: var(--color-purple); }
   
   /* ── Tabs ── */
   .tab-bar {
     display: flex; gap: 2px;
     background: var(--color-surface-2);
     border-radius: var(--radius-md);
     padding: 3px;
     margin-bottom: var(--sp-5);
     border: 1px solid var(--color-border);
   }
   .tab-btn {
     flex: 1;
     padding: 8px 16px;
     background: none; border: none;
     color: var(--text-muted);
     font-size: 13px; font-weight: 500;
     border-radius: 6px;
     cursor: pointer;
     transition: all var(--tr-fast);
     font-family: var(--font-body);
   }
   .tab-btn.active {
     background: var(--color-surface-3);
     color: var(--color-cyan);
     box-shadow: 0 1px 4px rgba(0,0,0,0.3);
   }
   .tab-panel { display: none; }
   .tab-panel.active { display: block; }
   
   /* ── Modal ── */
   .modal-overlay {
     position: fixed; inset: 0;
     background: rgba(0,0,0,0.7);
     backdrop-filter: blur(4px);
     z-index: 1000;
     display: flex; align-items: center; justify-content: center;
     padding: var(--sp-4);
     opacity: 0; pointer-events: none;
     transition: opacity var(--tr-normal);
   }
   .modal-overlay.open { opacity: 1; pointer-events: all; }
   .modal {
     background: var(--color-surface);
     border: 1px solid var(--color-border-hot);
     border-radius: var(--radius-xl);
     padding: var(--sp-8);
     width: 100%; max-width: 540px;
     box-shadow: 0 20px 60px rgba(0,0,0,0.6), var(--shadow-cyan);
     transform: translateY(20px) scale(0.97);
     transition: transform var(--tr-normal);
     max-height: 90vh; overflow-y: auto;
   }
   .modal-overlay.open .modal { transform: translateY(0) scale(1); }
   .modal-header {
     display: flex; align-items: center; justify-content: space-between;
     margin-bottom: var(--sp-6);
   }
   .modal-title {
     font-family: var(--font-display);
     font-size: 16px; font-weight: 700;
     color: var(--text-primary);
     letter-spacing: 1px;
   }
   .modal-close {
     background: none; border: none;
     color: var(--text-muted); font-size: 20px;
     cursor: pointer; padding: 4px;
     transition: color var(--tr-fast);
   }
   .modal-close:hover { color: var(--color-red); }
   .modal-footer {
     display: flex; gap: var(--sp-3);
     margin-top: var(--sp-6); padding-top: var(--sp-5);
     border-top: 1px solid var(--color-border);
     justify-content: flex-end;
   }
   
   /* ── Toast ── */
   #toast-container {
     position: fixed; bottom: 24px; right: 24px;
     z-index: 9999;
     display: flex; flex-direction: column; gap: var(--sp-3);
   }
   .toast {
     background: var(--color-surface-2);
     border: 1px solid var(--color-border-hot);
     border-radius: var(--radius-md);
     padding: 12px 18px;
     font-size: 13px; color: var(--text-primary);
     box-shadow: var(--shadow-card);
     display: flex; align-items: center; gap: var(--sp-3);
     animation: slideInRight 0.3s ease;
     max-width: 320px;
   }
   .toast.success { border-color: rgba(0,255,136,0.4); }
   .toast.error   { border-color: rgba(255,61,92,0.4); }
   .toast.warning { border-color: rgba(255,215,0,0.4); }
   .toast-icon { font-size: 16px; }
   
   /* ── Upload Zone ── */
   .upload-zone {
     border: 2px dashed var(--color-border-hot);
     border-radius: var(--radius-lg);
     padding: var(--sp-8) var(--sp-6);
     text-align: center;
     cursor: pointer;
     transition: all var(--tr-normal);
     background: rgba(0,200,255,0.02);
   }
   .upload-zone:hover, .upload-zone.drag-over {
     border-color: var(--color-cyan);
     background: var(--color-cyan-glow);
   }
   .upload-zone .upload-icon { font-size: 36px; margin-bottom: var(--sp-3); }
   .upload-zone .upload-text {
     font-size: 14px; color: var(--text-secondary);
   }
   .upload-zone .upload-hint {
     font-size: 12px; color: var(--text-muted); margin-top: var(--sp-1);
   }
   
   /* ── Progress Bar ── */
   .progress-bar {
     height: 6px;
     background: var(--color-surface-3);
     border-radius: 3px; overflow: hidden;
   }
   .progress-fill {
     height: 100%;
     background: linear-gradient(90deg, var(--color-cyan), var(--color-green));
     border-radius: 3px;
     transition: width var(--tr-slow);
     position: relative;
   }
   .progress-fill::after {
     content: '';
     position: absolute; inset: 0;
     background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
     animation: shimmer 1.5s infinite;
   }
   
   /* ── Animations ── */
   @keyframes pulse {
     0%, 100% { opacity: 1; transform: scale(1); }
     50%       { opacity: 0.5; transform: scale(0.8); }
   }
   @keyframes slideInRight {
     from { transform: translateX(100%); opacity: 0; }
     to   { transform: translateX(0);    opacity: 1; }
   }
   @keyframes slideInUp {
     from { transform: translateY(20px); opacity: 0; }
     to   { transform: translateY(0);    opacity: 1; }
   }
   @keyframes shimmer {
     from { transform: translateX(-100%); }
     to   { transform: translateX(200%); }
   }
   @keyframes glowPulse {
     0%, 100% { box-shadow: 0 0 10px rgba(0,200,255,0.3); }
     50%       { box-shadow: 0 0 30px rgba(0,200,255,0.6); }
   }
   @keyframes scanline {
     from { transform: translateY(-100%); }
     to   { transform: translateY(100vh); }
   }
   @keyframes rotateGlow {
     from { transform: rotate(0deg); }
     to   { transform: rotate(360deg); }
   }
   
   /* ── Utility ── */
   .flex { display: flex; }
   .flex-1 { flex: 1; }
   .items-center { align-items: center; }
   .justify-between { justify-content: space-between; }
   .gap-2 { gap: var(--sp-2); }
   .gap-3 { gap: var(--sp-3); }
   .gap-4 { gap: var(--sp-4); }
   .gap-6 { gap: var(--sp-6); }
   .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
   .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-4); }
   .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-4); }
   .mt-2 { margin-top: var(--sp-2); }
   .mt-4 { margin-top: var(--sp-4); }
   .mt-6 { margin-top: var(--sp-6); }
   .mb-4 { margin-bottom: var(--sp-4); }
   .mb-6 { margin-bottom: var(--sp-6); }
   .text-cyan    { color: var(--color-cyan); }
   .text-orange  { color: var(--color-orange); }
   .text-green   { color: var(--color-green); }
   .text-muted   { color: var(--text-muted); }
   .text-sm      { font-size: 12px; }
   .text-xs      { font-size: 11px; }
   .font-mono    { font-family: var(--font-mono); }
   .font-display { font-family: var(--font-display); }
   .text-center  { text-align: center; }
   .truncate { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
   .hidden { display: none !important; }
   .relative { position: relative; }
   .divider { border: none; border-top: 1px solid var(--color-border); margin: var(--sp-5) 0; }
   
   /* ── Page Header ── */
   .page-header {
     display: flex; align-items: flex-start; justify-content: space-between;
     margin-bottom: var(--sp-8);
     flex-wrap: wrap; gap: var(--sp-4);
   }
   .page-title {
     font-family: var(--font-display);
     font-size: 22px; font-weight: 900;
     color: var(--text-primary);
     letter-spacing: 2px;
     line-height: 1.1;
   }
   .page-title span { color: var(--color-cyan); }
   .page-subtitle { font-size: 13px; color: var(--text-muted); margin-top: var(--sp-1); }
   
   /* ── Section Header ── */
   .section-header {
     display: flex; align-items: center; gap: var(--sp-3);
     margin-bottom: var(--sp-5);
   }
   .section-title {
     font-family: var(--font-display);
     font-size: 13px; font-weight: 600;
     color: var(--text-primary);
     letter-spacing: 1px;
   }
   .section-line {
     flex: 1; height: 1px;
     background: linear-gradient(to right, var(--color-border-hot), transparent);
   }
   
   /* ── Responsive ── */
   @media (max-width: 768px) {
     :root { --sidebar-width: 0px; }
     .sidebar {
       transform: translateX(-260px);
       width: 260px;
     }
     .sidebar.open { transform: translateX(0); }
     .main-content { margin-left: 0; }
     .stat-grid { grid-template-columns: 1fr 1fr; }
     .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
     .page-body { padding: var(--sp-4); }
   }