/**
 * 어린이방 공부방 꾸미기 - 메인 스타일시트
 * 반응형 디자인 (모바일 우선)
 *
 * 컬러 스킴:
 * - 메인: #51C4D3 (밝은 하늘색)
 * - 포인트: #FFDE59 (밝은 노랑), #3F72AF (딥 블루)
 * - 서브: #F7F7F7 (라이트 그레이), #FC5185 (코랄 핑크)
 * - 텍스트: #222222 (딥 그레이/블랙)
 */

:root {
    --color-primary: #51C4D3;
    --color-primary-dark: #3BA8B6;
    --color-accent-yellow: #FFDE59;
    --color-accent-blue: #3F72AF;
    --color-accent-pink: #FC5185;
    --color-bg-light: #F7F7F7;
    --color-bg-white: #FFFFFF;
    --color-text: #222222;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-border: #E0E0E0;
    --color-success: #4CAF50;
    --color-error: #F44336;
    --color-warning: #FF9800;

    --font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);

    --transition: all 0.3s ease;
    --container-max: 1200px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg-white);
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   HEADER
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-bg-white);
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 700;
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

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

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */
.main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-white);
    transform: translateX(-100%);
    transition: var(--transition);
    overflow-y: auto;
}

.main-nav.active {
    transform: translateX(0);
}

.nav-menu {
    padding: var(--spacing-xl);
}

.nav-menu li {
    border-bottom: 1px solid var(--color-border);
}

.nav-menu a {
    display: block;
    padding: var(--spacing-md) 0;
    font-weight: 500;
    color: var(--color-text);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-primary);
}

/* User Menu */
.user-menu {
    display: none;
}

/* ========================================
   MAIN CONTENT
   ======================================== */
.site-main {
    padding-top: 70px;
    min-height: calc(100vh - 70px);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-blue) 100%);
    color: var(--color-bg-white);
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   DRAG & DROP UPLOAD
   ======================================== */
.upload-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-light);
}

.upload-container {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.upload-title {
    font-size: var(--font-size-2xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.dropzone {
    border: 3px dashed var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3xl) var(--spacing-xl);
    text-align: center;
    background: var(--color-bg-light);
    transition: var(--transition);
    cursor: pointer;
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--color-accent-blue);
    background: rgba(81, 196, 211, 0.1);
}

.dropzone-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.dropzone-text {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.dropzone-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.dropzone input[type="file"] {
    display: none;
}

/* Preview Images */
.preview-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.preview-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--color-bg-light);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 28px;
    height: 28px;
    background: var(--color-error);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: var(--transition);
}

.preview-remove:hover {
    transform: scale(1.1);
}

.preview-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background: rgba(0,0,0,0.7);
    color: white;
    font-size: var(--font-size-sm);
    text-align: center;
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: var(--transition);
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
    background: #2D5A8A;
}

.btn-outline {
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    background: transparent;
}

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

.btn-yellow {
    background: var(--color-accent-yellow);
    color: var(--color-text);
}

.btn-yellow:hover {
    background: #E5C74F;
}

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* ========================================
   CARDS
   ======================================== */
.card {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.card:hover .card-image img {
    transform: scale(1.05);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.card-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* ========================================
   GALLERY - BEFORE/AFTER
   ======================================== */
.gallery-section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    font-size: var(--font-size-2xl);
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-text);
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
}

.gallery-item {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.compare-slider {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

.compare-before,
.compare-after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.compare-before img,
.compare-after img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.compare-after {
    clip-path: inset(0 50% 0 0);
}

.compare-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background: white;
    cursor: ew-resize;
    transform: translateX(-50%);
    z-index: 10;
}

.compare-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.compare-handle::after {
    content: '↔';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

.compare-labels {
    position: absolute;
    bottom: var(--spacing-md);
    left: var(--spacing-md);
    right: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

.compare-label {
    background: rgba(0,0,0,0.7);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ========================================
   PERFORMANCE SECTION
   ======================================== */
.performance-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-accent-blue) 0%, var(--color-primary) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

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

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

.form-label.required::after {
    content: '*';
    color: var(--color-error);
    margin-left: var(--spacing-xs);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: var(--transition);
    background: var(--color-bg-white);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(81, 196, 211, 0.2);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-hint {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-error);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--color-primary);
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    line-height: 1.4;
}

/* ========================================
   AUTH PAGES (Login, Register, etc.)
   ======================================== */
.auth-page {
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-bg-light);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-logo .logo-icon {
    font-size: 3rem;
}

.auth-logo .logo-text {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-top: var(--spacing-sm);
}

.auth-title {
    text-align: center;
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xl);
}

.auth-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.auth-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

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

.auth-divider {
    text-align: center;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--color-border);
}

.auth-divider span {
    background: var(--color-bg-white);
    padding: 0 var(--spacing-md);
    position: relative;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ========================================
   MY PAGE
   ======================================== */
.mypage-section {
    padding: var(--spacing-3xl) 0;
}

.mypage-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-blue) 100%);
    color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.mypage-user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.mypage-avatar {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.2);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-3xl);
}

.mypage-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
}

.mypage-email {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.mypage-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    overflow-x: auto;
    padding-bottom: var(--spacing-sm);
}

.mypage-tab {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
    font-weight: 500;
    white-space: nowrap;
}

.mypage-tab.active {
    background: var(--color-primary);
    color: white;
}

.mypage-content {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

/* Withdrawal Link - 작고 흐리게 오른쪽 아래 */
.withdrawal-link {
    display: block;
    text-align: right;
    margin-top: var(--spacing-2xl);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    opacity: 0.6;
}

.withdrawal-link:hover {
    opacity: 1;
    color: var(--color-error);
}

/* ========================================
   ALERTS
   ======================================== */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert-success {
    background: #E8F5E9;
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.alert-error {
    background: #FFEBEE;
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

.alert-warning {
    background: #FFF3E0;
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
}

.alert-info {
    background: #E3F2FD;
    color: var(--color-accent-blue);
    border: 1px solid var(--color-accent-blue);
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
    background: var(--color-text);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-lg);
    color: var(--color-accent-yellow);
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.footer-brand .logo-icon {
    font-size: var(--font-size-2xl);
}

.footer-brand .logo-text {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.footer-desc {
    font-size: var(--font-size-sm);
    opacity: 0.8;
    line-height: 1.7;
}

.footer-links li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--color-accent-yellow);
}

.footer-contact li {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.footer-contact span {
    color: var(--color-accent-yellow);
}

.footer-bottom {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}

.copyright {
    font-size: var(--font-size-sm);
    opacity: 0.6;
}

/* ========================================
   SITEMAP
   ======================================== */
.sitemap-section {
    padding: var(--spacing-3xl) 0;
}

.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.sitemap-category h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-primary);
}

.sitemap-category ul {
    padding-left: var(--spacing-md);
}

.sitemap-category li {
    margin-bottom: var(--spacing-sm);
}

.sitemap-category a {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.sitemap-category a:hover {
    color: var(--color-primary);
}

/* ========================================
   LOADING & SPINNER
   ======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

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

/* ========================================
   UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.text-error { color: var(--color-error); }
.text-success { color: var(--color-success); }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none !important; }

/* ========================================
   TABLET STYLES (768px+)
   ======================================== */
@media (min-width: 768px) {
    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .sitemap-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .preview-container {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ========================================
   DESKTOP STYLES (1024px+)
   ======================================== */
@media (min-width: 1024px) {
    /* Header Desktop */
    .mobile-menu-toggle {
        display: none;
    }

    .main-nav {
        position: static;
        transform: none;
        background: transparent;
        overflow: visible;
    }

    .nav-menu {
        display: flex;
        gap: var(--spacing-lg);
        padding: 0;
    }

    .nav-menu li {
        border: none;
    }

    .nav-menu a {
        padding: var(--spacing-sm) var(--spacing-md);
        position: relative;
    }

    .nav-menu a::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: var(--spacing-md);
        right: var(--spacing-md);
        height: 2px;
        background: var(--color-primary);
        transform: scaleX(0);
        transition: var(--transition);
    }

    .nav-menu a:hover::after,
    .nav-menu a.active::after {
        transform: scaleX(1);
    }

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

    .btn-login,
    .btn-register {
        padding: var(--spacing-sm) var(--spacing-lg);
        border-radius: var(--radius-md);
        font-size: var(--font-size-sm);
        font-weight: 500;
    }

    .btn-login {
        color: var(--color-text);
    }

    .btn-login:hover {
        color: var(--color-primary);
    }

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

    .btn-register:hover {
        background: var(--color-primary-dark);
    }

    .btn-user {
        font-weight: 500;
    }

    .btn-logout {
        font-size: var(--font-size-sm);
        color: var(--color-text-muted);
    }

    .btn-logout:hover {
        color: var(--color-error);
    }

    /* Footer Desktop */
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    /* Gallery Desktop */
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .sitemap-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .preview-container {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ========================================
   LARGE DESKTOP (1280px+)
   ======================================== */
@media (min-width: 1280px) {
    :root {
        --container-max: 1400px;
    }
}