/* ===== CSS Variables ===== */
:root {
    /* Colors */
    --color-primary: #3498db;
    --color-primary-hover: #2980b9;
    --color-success: #27ae60;
    --color-success-hover: #229954;
    --color-danger: #e74c3c;
    --color-warning: #f39c12;
    --color-secondary: #95a5a6;
    --color-secondary-hover: #7f8c8d;
    --color-text: #333;
    --color-text-muted: #666;
    --color-text-light: #888;
    --color-bg: #f5f5f5;
    --color-card: #fff;
    --color-navbar: #2c3e50;
    --color-border: #ddd;
    --color-border-light: #eee;

    /* Message background colors (Phase 3.3) */
    --color-success-bg: #d4edda;
    --color-success-text: #155724;
    --color-error-bg: #f8d7da;
    --color-error-text: #721c24;
    --color-warning-bg: #fff3cd;
    --color-warning-text: #856404;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Animation timing (Phase 3.2) */
    --animation-fade-duration: 0.5s;
    --animation-fade-delay: 4.5s;

    /* Layout (Phase 3.2) */
    --touch-target-min: 44px;
    --logo-height: 52px;
    --logo-height-tablet: 44px;
    --logo-height-mobile: 36px;
    --logo-height-xs: 32px;
    --table-min-width: 500px;
    --icon-size-sm: 14px;
    --icon-size-md: 18px;
    --input-icon-padding: 44px;
    --card-max-width-form: 600px;
}

/* ===== Base Styles ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== Utility Classes ===== */
.page-title {
    margin-bottom: var(--spacing-lg);
}

.form-section-title {
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.card-narrow {
    max-width: var(--card-max-width-form);
}

.icon-sm {
    width: var(--icon-size-sm);
    height: var(--icon-size-sm);
}

.success-inline {
    color: var(--color-success);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.question-quote {
    background-color: #f8f9fa;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-primary);
}

.question-quote-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    font-weight: bold;
}

/* Spacing utilities */
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-md { margin-top: var(--spacing-md); }

/* ===== Navigation ===== */
.navbar {
    background-color: var(--color-navbar);
    color: white;
    position: relative;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar .brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    white-space: nowrap;
}

.navbar .brand-logo {
    height: var(--logo-height);
    display: block;
}

/* Burger Menu Button */
.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: var(--touch-target-min);
    height: var(--touch-target-min);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: 1001;
}

.burger-menu span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: white;
    margin: 3px 0;
    transition: var(--transition-normal);
    border-radius: 2px;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    padding: var(--spacing-md) 0;
}

.nav-links a {
    color: #ecf0f1;
    text-decoration: none;
    transition: color var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: var(--touch-target-min);
    padding: var(--spacing-sm) var(--spacing-sm);
}

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

.nav-links a svg {
    width: 18px;
    height: 18px;
}

.user-info {
    color: #bdc3c7;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.user-info svg {
    width: 16px;
    height: 16px;
}

/* ===== Main Content ===== */
main {
    flex: 1;
    padding: var(--spacing-xl) 0;
}

/* ===== Messages / Toast (Phase 2.3) ===== */
.messages {
    margin-bottom: var(--spacing-md);
    position: fixed;
    top: 80px;
    right: var(--spacing-lg);
    z-index: 1000;
    max-width: 400px;
}

.message {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    animation: slideIn var(--transition-slow) ease, fadeOut 0.5s ease 4.5s forwards;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

.message.success {
    background-color: var(--color-success-bg);
    color: var(--color-success-text);
    border-left: 4px solid var(--color-success);
}

.message.error {
    background-color: var(--color-error-bg);
    color: var(--color-error-text);
    border-left: 4px solid var(--color-danger);
}

.message.warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning-text);
    border-left: 4px solid var(--color-warning);
}

/* ===== Cards (Phase 3.4) ===== */
.card {
    background: var(--color-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: box-shadow var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card h2 {
    margin-bottom: var(--spacing-md);
    color: var(--color-navbar);
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: var(--spacing-sm);
}

.card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-navbar);
}

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--color-navbar);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
    min-height: var(--touch-target-min);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.form-group .helptext {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.form-group .errorlist {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-xs);
}

.form-group .errorlist li {
    color: var(--color-danger);
    font-size: 0.85rem;
}

/* ===== Buttons (Phase 1.3, 2.4) ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-normal);
    min-height: var(--touch-target-min);
    white-space: nowrap;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn:disabled,
.btn.loading {
    opacity: 0.6;
    cursor: not-allowed;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    width: 14px;
    height: 14px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin-left: var(--spacing-sm);
}

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

.btn-primary {
    background-color: var(--color-primary);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-secondary-hover);
}

.btn-success {
    background-color: var(--color-success);
    color: white;
}

.btn-success:hover:not(:disabled) {
    background-color: var(--color-success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    min-height: 36px;
}

/* ===== Tables (Phase 1.1) ===== */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-md);
    position: relative;
}

.table-responsive::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 30px;
    height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.8));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.table-responsive.has-scroll::after {
    opacity: 1;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: var(--table-min-width);
}

table th,
table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: var(--color-navbar);
    position: sticky;
    top: 0;
    white-space: nowrap;
}

table tr {
    transition: background-color var(--transition-fast);
}

table tr:hover {
    background-color: #f8f9fa;
}

/* ===== Responsive visibility ===== */
.mobile-only {
    display: none !important;
}

.desktop-only {
    display: block;
}

/* ===== Mobile Game Cards ===== */
.game-cards {
    flex-direction: column;
    gap: var(--spacing-md);
}

.game-card {
    background: #f8f9fa;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    border-left: 4px solid var(--color-primary);
}

.game-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-light);
}

.game-date {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.game-result {
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
}

.game-card-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.game-player {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--spacing-xs);
}

.game-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    min-width: 60px;
}

.game-value {
    font-weight: 600;
    color: var(--color-text);
}

.game-leader {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ===== Mobile Stat Cards ===== */
.stat-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.stat-card {
    background: #f8f9fa;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.stat-card-header {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border-light);
    flex-wrap: wrap;
}

.stat-leader {
    font-weight: 600;
    color: var(--color-navbar);
    text-align: center;
}

.stat-vs {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.stat-card-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xs) var(--spacing-md);
}

.stat-row {
    display: contents;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.stat-value {
    font-weight: 600;
    text-align: right;
}

.stat-highlight .stat-label,
.stat-highlight .stat-value {
    color: var(--color-primary);
}

/* ===== Stats ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--color-primary);
}

/* ===== Question List (Phase 3.1) ===== */
.question-item {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.question-item:last-child {
    border-bottom: none;
}

.question-body {
    font-size: 1.05rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.question-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

.badge svg {
    width: 14px;
    height: 14px;
}

.badge-success {
    background-color: #d4edda;
    color: #155724;
}

.badge-votes {
    background-color: #e9ecef;
    color: #495057;
}

.badge-voted {
    background-color: #d4edda;
    color: #155724;
}

/* ===== Vote Button (Phase 1.3, 2.3) ===== */
.btn-vote {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    min-width: 44px;
    min-height: 44px;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-vote svg {
    width: 16px;
    height: 16px;
}

.btn-vote:hover {
    background-color: var(--color-primary-hover);
    transform: scale(1.05);
}

.btn-vote:active {
    transform: scale(0.95);
}

.btn-vote.voted {
    background-color: var(--color-success);
}

/* Vote animation */
@keyframes votePopup {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

.btn-vote.animating {
    animation: votePopup 0.3s ease;
}

/* ===== Auth Pages ===== */
.auth-container {
    max-width: 400px;
    margin: var(--spacing-xl) auto;
}

.auth-container .card {
    text-align: center;
}

.auth-container h1 {
    margin-bottom: var(--spacing-lg);
    color: var(--color-navbar);
}

.auth-container .form-group {
    text-align: left;
}

.auth-container .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

.auth-links {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
}

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

/* ===== Answer Block ===== */
.answer-block {
    background-color: #f8f9fa;
    border-left: 4px solid var(--color-success);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    line-height: 1.7;
}

.answer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.answer-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.answer-title {
    color: var(--color-success);
}

.answer-author {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.question-author {
    font-weight: 500;
    color: var(--color-navbar);
}

.answer-block h3 {
    color: var(--color-success);
    margin-bottom: var(--spacing-sm);
}

.answer-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-sm);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-navbar);
    color: #bdc3c7;
    padding: var(--spacing-lg) 0;
    text-align: center;
    margin-top: auto;
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

.footer p:first-child {
    color: white;
    font-weight: 500;
}

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

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

.footer-copyright {
    font-size: 0.85rem;
    margin-top: var(--spacing-sm);
}

/* ===== Result Colors ===== */
.result-win {
    color: var(--color-success);
    font-weight: 600;
}

.result-loss {
    color: var(--color-danger);
    font-weight: 600;
}

.result-draw {
    color: var(--color-warning);
    font-weight: 600;
}

/* ===== Relative Time (Phase 2.2) ===== */
.relative-time {
    cursor: help;
    border-bottom: 1px dotted var(--color-text-muted);
}

/* ===== Filter Controls ===== */
.filter-controls {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.filter-controls .search-box {
    flex: 1;
    margin-bottom: 0;
}

.checkbox-filter {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    white-space: nowrap;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
    user-select: none;
}

.checkbox-filter:hover {
    background-color: #f8f9fa;
}

.checkbox-filter input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--color-primary);
}

.checkbox-filter span {
    font-size: 0.9rem;
    color: var(--color-text);
}

/* ===== Search Box ===== */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.search-box input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) var(--input-icon-padding);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.search-box .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
    pointer-events: none;
}

.search-box .search-clear {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.search-box .search-clear:hover {
    color: var(--color-danger);
    background-color: rgba(231, 76, 60, 0.1);
}

.search-box .search-clear svg {
    width: 16px;
    height: 16px;
}

.filter-status {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: #f8f9fa;
    border-radius: var(--radius-sm);
}

.question-item.hidden {
    display: none !important;
}

/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ===== Header Actions ===== */
.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.card-header h2 {
    margin-bottom: 0;
    border-bottom: none;
    padding-bottom: 0;
}

.total-count {
    font-size: 1.1rem;
    color: var(--color-text-muted);
}

.total-count strong {
    color: var(--color-primary);
    font-size: 1.3rem;
}

/* ===== Responsive (Phase 1) ===== */
@media (max-width: 1024px) {
    .navbar .brand {
        font-size: 1.2rem;
    }

    .navbar .brand-logo {
        height: 44px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .navbar .brand {
        font-size: 1rem;
    }

    .navbar .brand-logo {
        height: 36px;
    }

    /* Show mobile cards, hide desktop tables */
    .mobile-only {
        display: block !important;
    }

    .mobile-only.game-cards,
    .mobile-only.stat-cards {
        display: flex !important;
    }

    .desktop-only {
        display: none !important;
    }

    /* Burger menu visible */
    .burger-menu {
        display: flex;
    }

    /* Nav links hidden by default */
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background-color: var(--color-navbar);
        flex-direction: column;
        align-items: stretch;
        padding: 80px var(--spacing-lg) var(--spacing-lg);
        gap: 0;
        transition: right var(--transition-slow);
        z-index: 1000;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        min-height: var(--touch-target-min);
    }

    .nav-links .user-info {
        padding: var(--spacing-md);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    /* Overlay */
    .nav-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .nav-overlay.active {
        display: block;
    }

    table {
        font-size: 0.9rem;
    }

    table th,
    table td {
        padding: var(--spacing-sm);
    }

    /* Stats grid */
    .stats-grid {
        grid-template-columns: 1fr;
    }

    /* Question meta stack */
    .question-meta {
        gap: var(--spacing-sm);
    }

    /* Filter controls stack */
    .filter-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .checkbox-filter {
        justify-content: flex-start;
    }

    /* Card header stack */
    .card-header {
        flex-direction: column;
        align-items: flex-start;
    }

    /* Messages position */
    .messages {
        left: var(--spacing-md);
        right: var(--spacing-md);
        max-width: none;
    }

    /* Main padding */
    main {
        padding: var(--spacing-md) 0;
    }
}

/* ===== Extra small screens ===== */
@media (max-width: 480px) {
    .navbar .brand {
        font-size: 0.85rem;
        gap: var(--spacing-xs);
    }

    .navbar .brand-logo {
        height: 32px;
    }

    .btn {
        width: 100%;
    }

    .btn-sm {
        width: auto;
    }

    .question-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .pagination {
        flex-direction: column;
    }
}

/* ===== Print styles ===== */
@media print {
    .navbar,
    .footer,
    .btn-vote,
    .burger-menu {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}