/* Color variables */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-muted: #93c5fd;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --danger-light: #fef2f2;
    --warning: #d97706;
    --warning-hover: #b45309;
    --success: #16a34a;
    --success-light: #f0fdf4;
    --text: #1e293b;
    --text-secondary: #64748b;
    --bg: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --sidebar-bg: #ffffff;
    --sidebar-active: #eff6ff;
}

/* Reset */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.5;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    font-size: 14px;
    display: flex;
    flex-direction: column;
}

/* Header */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

h1 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
}

/* Header controls */
.header-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Theme toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
}

.theme-toggle:hover {
    background: var(--primary-light);
    border-color: var(--primary-muted);
    color: var(--primary);
}

/* Auth */
.auth-section { position: relative; }

.login-button {
    background: var(--primary);
    color: #fff;
    padding: 6px 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
}

.login-button:hover {
    background: var(--primary-hover);
}

/* User menu */
.user-menu { position: relative; }

.user-menu-btn {
    background: var(--surface);
    color: var(--text);
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
}

.user-menu-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-muted);
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    min-width: 140px;
    z-index: 500;
    overflow: hidden;
}

.user-dropdown button {
    display: block;
    width: 100%;
    padding: 8px 14px;
    border: none;
    border-radius: 0;
    background: none;
    color: var(--text);
    font-size: 13px;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
}

.user-dropdown button:hover {
    background: var(--primary-light);
}

/* ============ Split-Pane Layout ============ */

.app-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-new-btn {
    margin: 12px 12px 8px;
    background: var(--primary);
    color: #fff;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    text-align: center;
}

.sidebar-new-btn:hover {
    background: var(--primary-hover);
}

/* Admin section in sidebar */
.sidebar .admin-section {
    margin: 0 12px 8px;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 13px;
}

.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    font-weight: 600;
    font-size: 13px;
}

.admin-toggle {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-secondary);
    width: 20px;
    text-align: center;
    line-height: 1;
}

.inline-form {
    display: flex;
    gap: 4px;
    align-items: center;
    margin: 8px 0 6px;
}

.inline-form input[type="text"] {
    flex: 1;
    padding: 5px 8px;
    font-size: 12px;
    min-width: 0;
}

.inline-form input[type="color"] {
    width: 30px;
    height: 28px;
    padding: 1px;
    border: 1px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
}

.inline-form button {
    background: var(--primary);
    color: #fff;
    padding: 5px 10px;
    font-size: 12px;
    white-space: nowrap;
}

.inline-form button:hover { background: var(--primary-hover); }

.category-list {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 8px;
    border-radius: 4px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-size: 12px;
}

.category-item-info {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    overflow: hidden;
}

.category-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.category-item button {
    padding: 1px 6px;
    font-size: 10px;
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: 3px;
    flex-shrink: 0;
}

.category-item button:hover {
    background: var(--danger);
    color: #fff;
}

/* Sidebar sort */
.sidebar-sort {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-bottom: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

.sidebar-sort label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0;
    white-space: nowrap;
}

.sidebar-sort select {
    flex: 1;
    padding: 4px 6px;
    font-size: 12px;
    border-radius: 4px;
    min-width: 0;
}

/* Sidebar list */
.sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 0;
}

.sidebar-group {
    margin-bottom: 2px;
}

.sidebar-group-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.sidebar-group-header:hover {
    background: var(--bg);
}

.sidebar-group-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar-group-chevron {
    margin-left: auto;
    font-size: 10px;
    transition: transform 0.15s;
}

.sidebar-group.collapsed .sidebar-group-chevron {
    transform: rotate(-90deg);
}

.sidebar-group.collapsed .sidebar-group-items {
    display: none;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px 7px 24px;
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: background 0.1s, border-color 0.1s;
}

.sidebar-item:hover {
    background: var(--bg);
}

.sidebar-item.active {
    background: var(--sidebar-active);
    border-left-color: var(--primary);
}

.sidebar-item-title {
    flex: 1;
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.sidebar-item-votes {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    flex-shrink: 0;
    background: var(--bg);
    padding: 1px 6px;
    border-radius: 10px;
}

.sidebar-item-status {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sidebar-item-status.open { background: var(--success); }
.sidebar-item-status.closed { background: var(--danger); }

.sidebar-empty {
    padding: 20px 12px;
    text-align: center;
    font-size: 13px;
    color: var(--text-secondary);
}

/* ============ Main Content Panel ============ */

.main-content {
    overflow-y: auto;
    padding: 20px 28px;
    display: flex;
    flex-direction: column;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
    margin: auto;
}

.empty-state p { font-size: 14px; margin-bottom: 4px; }
.empty-state p:first-child { font-size: 15px; font-weight: 600; }

/* Detail view */
.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
}

.detail-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    flex: 1;
    min-width: 0;
}

.detail-actions {
    display: flex;
    gap: 6px;
    flex-shrink: 0;
}

.detail-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    font-size: 13px;
}

/* Category reassignment (supervisor) */
.detail-category-reassign {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}

.detail-category-reassign label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0;
    white-space: nowrap;
}

.detail-category-reassign select {
    width: auto;
    padding: 5px 10px;
    font-size: 13px;
    border-radius: 6px;
    min-width: 160px;
}

.detail-description {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text);
    margin-bottom: 20px;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.detail-vote-section {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding: 12px 16px;
    background: var(--bg);
    border-radius: 8px;
    border: 1px solid var(--border);
}

.detail-vote-count {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.detail-vote-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Buttons base reset */
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    font-size: 13px;
    font-weight: 600;
    border-radius: 6px;
    padding: 8px 14px;
    transition: all 0.15s;
}

/* Status badges */
.feature-status {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
}

.feature-status.open {
    background: var(--success-light);
    color: var(--success);
}

.feature-status.closed {
    background: var(--danger-light);
    color: var(--danger);
}

.feature-date {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Category badge */
.category-badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    margin-right: 4px;
}

/* Vote button */
.vote-button {
    background: var(--primary);
    color: #fff;
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

.vote-button:hover:not([disabled]) {
    background: var(--primary-hover);
}

.vote-button.voted,
.vote-button[disabled] {
    background: var(--primary-muted);
    cursor: not-allowed;
}

/* Supervisor controls */
.close-feature-btn,
.reopen-feature-btn {
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.close-feature-btn:hover { background: var(--warning); color: #fff; border-color: var(--warning); }
.reopen-feature-btn:hover { background: var(--success); color: #fff; border-color: var(--success); }

.delete-feature-btn {
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    background: var(--surface);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.delete-feature-btn:hover {
    background: var(--danger);
    color: #fff;
}

/* ============ Comments in Detail View ============ */

.detail-comments-section {
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

.detail-comments-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 12px;
}

.comment {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 8px;
}

.comment-body {
    font-size: 13px;
    line-height: 1.5;
    color: var(--text);
    margin-bottom: 4px;
}

.comment-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-secondary);
}

.comment-delete {
    padding: 1px 6px;
    font-size: 11px;
    background: transparent;
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: 3px;
    cursor: pointer;
}

.comment-delete:hover { background: var(--danger); color: #fff; }

.no-comments {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 0;
}

.add-comment {
    margin-top: 12px;
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.add-comment textarea {
    flex: 1;
    min-height: 40px;
    padding: 8px 10px;
    font-size: 13px;
}

.add-comment button {
    padding: 8px 16px;
    font-size: 13px;
    background: var(--primary);
    color: #fff;
}

.add-comment button:hover { background: var(--primary-hover); }

/* ============ Form / Modal ============ */

.form-group {
    margin-bottom: 12px;
    width: 100%;
}

label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 13px;
    color: var(--text);
}

input, textarea, select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    font-family: inherit;
    color: var(--text);
    background: var(--surface);
    transition: border-color 0.15s;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

textarea {
    min-height: 72px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 8px;
    align-items: center;
    margin-top: 8px;
}

.submit-button {
    background: var(--primary);
    color: #fff;
    padding: 8px 18px;
}

.submit-button:hover { background: var(--primary-hover); }
.submit-button:disabled { background: var(--primary-muted); cursor: not-allowed; }

.cancel-button {
    background: var(--surface);
    color: var(--text);
    padding: 8px 18px;
    border: 1px solid var(--border);
}

.cancel-button:hover { background: var(--bg); }

/* Char counter */
.char-counter {
    font-size: 11px;
    color: var(--text-secondary);
    text-align: right;
    margin-top: 2px;
}

.char-counter-warning { color: var(--danger); font-weight: 600; }

/* Inline error (non-toast) */
.error-message-inline {
    font-size: 12px;
    color: var(--danger);
    margin-top: 2px;
}

/* ============ Modal ============ */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
}

.modal-content {
    background: var(--surface);
    margin: 10% auto;
    padding: 24px;
    border-radius: 8px;
    width: 90%;
    max-width: 480px;
    position: relative;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.close {
    position: absolute;
    right: 16px;
    top: 12px;
    font-size: 22px;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-secondary);
    line-height: 1;
}

.close:hover { color: var(--text); }

/* ============ Toast Messages ============ */

.error-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--danger);
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    animation: slideIn 0.3s ease-out;
    z-index: 1100;
    max-width: 280px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.success-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success);
    color: #fff;
    padding: 10px 16px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    animation: slideIn 0.3s ease-out;
    z-index: 1100;
    max-width: 280px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.fade-out { opacity: 0; transition: opacity 0.3s; }

/* ============ Loading ============ */

.loading { opacity: 0.6; pointer-events: none; }

.loading-indicator {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1000;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ============ Footer ============ */

.main-footer {
    text-align: center;
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--surface);
    flex-shrink: 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 4px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-copy { margin: 0; }

.footer-copy a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.footer-copy a:hover { text-decoration: underline; }

/* ============ Mobile sidebar toggle / back ============ */

.mobile-sidebar-toggle {
    display: none;
    position: fixed;
    bottom: 16px;
    left: 16px;
    z-index: 800;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    font-size: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    cursor: pointer;
}

.mobile-sidebar-toggle:hover {
    background: var(--primary-hover);
}

.mobile-back-btn {
    display: none;
    position: fixed;
    top: 56px;
    left: 8px;
    z-index: 800;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.mobile-back-btn:hover {
    background: var(--bg);
}

/* ============ Animations ============ */

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ============ Dark Mode ============ */

[data-theme="dark"] {
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --primary-light: #1e293b;
    --primary-muted: #1e3a5f;
    --danger: #f87171;
    --danger-hover: #ef4444;
    --danger-light: #2d1b1b;
    --warning: #fbbf24;
    --warning-hover: #f59e0b;
    --success: #4ade80;
    --success-light: #1b2d1b;
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --bg: #0f172a;
    --surface: #1e293b;
    --border: #334155;
    --border-hover: #475569;
    --sidebar-bg: #1e293b;
    --sidebar-active: #293548;
}

[data-theme="dark"] input,
[data-theme="dark"] textarea,
[data-theme="dark"] select {
    background: #0f172a;
    color: #e2e8f0;
    border-color: #334155;
}

[data-theme="dark"] .modal-content {
    background: #1e293b;
}

/* ============ Responsive (<=768px) ============ */

@media (max-width: 768px) {
    .main-header {
        padding: 8px 12px;
    }

    h1 { font-size: 1.1rem; }

    .app-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: fixed;
        top: 0;
        left: -300px;
        width: 280px;
        height: 100vh;
        z-index: 900;
        transition: left 0.25s ease;
        box-shadow: none;
    }

    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.2);
    }

    .mobile-sidebar-toggle {
        display: block;
    }

    /* When sidebar is open, show overlay */
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.3);
        z-index: 899;
    }

    .sidebar-overlay.visible {
        display: block;
    }

    .main-content {
        padding: 16px;
    }

    /* Show back button when detail is shown on mobile */
    body.mobile-detail-view .mobile-back-btn {
        display: block;
    }

    body.mobile-detail-view .mobile-sidebar-toggle {
        display: none;
    }

    .modal-content {
        margin: 5% auto;
        width: 95%;
        padding: 16px;
    }

    .form-actions { flex-direction: column; }
    .form-actions button { width: 100%; }

    .add-comment { flex-direction: column; }

    .detail-header { flex-direction: column; gap: 8px; }
    .detail-actions { width: 100%; justify-content: flex-start; }

    .user-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
    }

    .footer-links { gap: 12px; }
}

/* ============ Help Page ============ */

.help-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.header-home-link {
    color: inherit;
    text-decoration: none;
}

.header-home-link:hover {
    color: var(--primary);
}

.help-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.help-link:hover {
    color: var(--primary);
    background: var(--primary-light);
    border-color: var(--primary-muted);
}

.help-back-link {
    color: #fff;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    background: var(--primary);
    padding: 6px 14px;
    border-radius: 6px;
}

.help-back-link:hover {
    background: var(--primary-hover);
}

.help-container {
    flex: 1;
    max-width: 720px;
    margin: 0 auto;
    padding: 24px 20px 40px;
    width: 100%;
}

.help-page-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text);
}

.help-section {
    margin-bottom: 24px;
}

.help-section h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--border);
}

.help-section p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 8px;
}

.help-section ul {
    margin: 8px 0;
    padding-left: 24px;
}

.help-section li {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
    margin-bottom: 4px;
}

/* ============ Accessibility ============ */

@media (prefers-reduced-motion: reduce) {
    * { animation: none !important; transition: none !important; }
}

/* ============ Print ============ */

@media print {
    .sidebar, .vote-button, .detail-actions, .header-controls, .main-footer { display: none; }
    .app-layout { grid-template-columns: 1fr; }
    .main-content { padding: 0; }
}