/* =================================
   迪豪发卡导航系统 - 精美样式表
   ================================= */

/* 基础变量 */
:root {
    /* 浅色主题 - 升级配色方案 */
    --primary-color: #7c3aed;
    --primary-dark: #6d28d9;
    --primary-light: #a78bfa;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --info-color: #3b82f6;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-hover: #e2e8f0;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 深色主题 */
body.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
}

/* =================================
   动态背景效果
   ================================= */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.gradient-bg {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 40% 90%, rgba(59, 130, 246, 0.15) 0%, transparent 50%);
    animation: gradientShift 20s ease infinite;
}

@keyframes gradientShift {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(5%, 5%) rotate(120deg);
    }
    66% {
        transform: translate(-5%, 5%) rotate(240deg);
    }
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0.3;
    animation: particleFloat linear infinite;
}

.particles span:nth-child(1) {
    left: 10%;
    animation-duration: 15s;
    animation-delay: 0s;
}

.particles span:nth-child(2) {
    left: 20%;
    animation-duration: 12s;
    animation-delay: 2s;
}

.particles span:nth-child(3) {
    left: 30%;
    animation-duration: 18s;
    animation-delay: 4s;
}

.particles span:nth-child(4) {
    left: 40%;
    animation-duration: 14s;
    animation-delay: 1s;
}

.particles span:nth-child(5) {
    left: 50%;
    animation-duration: 16s;
    animation-delay: 3s;
}

.particles span:nth-child(6) {
    left: 60%;
    animation-duration: 13s;
    animation-delay: 5s;
}

.particles span:nth-child(7) {
    left: 70%;
    animation-duration: 17s;
    animation-delay: 2s;
}

.particles span:nth-child(8) {
    left: 80%;
    animation-duration: 15s;
    animation-delay: 4s;
}

.particles span:nth-child(9) {
    left: 90%;
    animation-duration: 19s;
    animation-delay: 1s;
}

.particles span:nth-child(10) {
    left: 95%;
    animation-duration: 14s;
    animation-delay: 3s;
}

@keyframes particleFloat {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100px) scale(1);
        opacity: 0;
    }
}

/* 容器 */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* =================================
   顶部导航栏
   ================================= */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
}

.logo i {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
    flex: 1;
    justify-content: flex-start;
    margin-left: 2rem;
}

.nav-link {
    padding: 0.75rem 1.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav-link.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-hover);
    transform: rotate(15deg) scale(1.1);
}

.mobile-menu-toggle {
    display: none !important;
}

/* 移动端菜单 */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 300px;
    height: 100vh;
    background: var(--bg-primary);
    box-shadow: var(--shadow-xl);
    transition: var(--transition);
    z-index: 1000;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu-content {
    padding: 2rem;
    height: 100%;
    overflow-y: auto;
}

.mobile-menu-close {
    width: 44px;
    height: 44px;
    border-radius: var(--radius);
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.25rem;
    margin-bottom: 2rem;
    transition: var(--transition-fast);
}

.mobile-menu-close:hover {
    background: var(--bg-hover);
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.mobile-nav-link {
    padding: 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: 500;
    transition: var(--transition-fast);
}

.mobile-nav-link:hover {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.mobile-nav-link.active {
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
}

/* =================================
   主要内容区域
   ================================= */
.main {
    flex: 1;
    padding: 3rem 0;
}

/* =================================
   Hero 区域
   ================================= */
.hero-section {
    padding: 4rem 0 3rem;
    text-align: center;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientFlow 3s ease infinite;
    background-size: 200% 200%;
}

@keyframes gradientFlow {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.3em;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    flex-wrap: wrap;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem 2rem;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 2px solid transparent;
    background-clip: padding-box;
    position: relative;
    transition: var(--transition);
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    padding: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.stat-item:hover::before {
    opacity: 1;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* 搜索区域 */
.search-section {
    margin-bottom: 3rem;
}

.search-container {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem 1.5rem;
    transition: var(--transition-fast);
}

.search-box:focus-within {
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1), var(--shadow-xl);
}

.search-icon {
    font-size: 1.25rem;
    color: var(--text-muted);
    margin-right: 1rem;
}

.search-input {
    flex: 1;
    border: none;
    outline: none;
    background: transparent;
    color: var(--text-primary);
    font-size: 1.125rem;
    padding: 0.75rem 0;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.search-clear.active {
    display: flex;
}

.search-clear:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.search-suggestions {
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    max-height: 400px;
    overflow-y: auto;
    display: none;
    z-index: 50;
}

.search-suggestions.active {
    display: block;
}

.suggestion-item {
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
    border-bottom: 1px solid var(--border-color);
}

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

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

.suggestion-item strong {
    color: var(--primary-color);
}

/* =================================
   网站卡片网格
   ================================= */
.sites-section {
    position: relative;
}

.sites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.site-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    display: block;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
    background-clip: padding-box;
}

.site-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    border-radius: var(--radius-lg);
    padding: 2px;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.site-card::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(124, 58, 237, 0.1), transparent);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.site-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(124, 58, 237, 0.3);
}

.site-card:hover::before {
    opacity: 1;
}

.site-card:hover::after {
    width: 300px;
    height: 300px;
}

.site-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.375rem 0.875rem;
    background: linear-gradient(135deg, var(--accent-color), var(--secondary-color));
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    z-index: 10;
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 12px rgba(245, 158, 11, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 16px rgba(245, 158, 11, 0.6);
    }
}

.site-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.site-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    flex-shrink: 0;
    box-shadow: 0 8px 16px rgba(124, 58, 237, 0.3);
    position: relative;
    animation: iconPulse 3s ease-in-out infinite;
}

@keyframes iconPulse {
    0%, 100% {
        box-shadow: 0 8px 16px rgba(124, 58, 237, 0.3);
    }
    50% {
        box-shadow: 0 8px 24px rgba(124, 58, 237, 0.5), 0 0 30px rgba(236, 72, 153, 0.3);
    }
}

.site-info {
    flex: 1;
    min-width: 0;
}

.site-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.site-category {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

.site-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.site-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.site-tag {
    font-size: 0.8125rem;
    color: var(--primary-color);
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(236, 72, 153, 0.1));
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(124, 58, 237, 0.2);
    transition: var(--transition-fast);
    position: relative;
    z-index: 1;
}

.site-tag:hover {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.2), rgba(236, 72, 153, 0.2));
    border-color: rgba(124, 58, 237, 0.4);
    transform: translateY(-2px);
}

/* 无结果提示 */
.no-results {
    display: none;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.no-results.active {
    display: block;
}

.no-results i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.no-results p {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* =================================
   页脚
   ================================= */
.footer {
    background: linear-gradient(to bottom, transparent, var(--bg-primary));
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 2rem;
    margin-top: 6rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), var(--secondary-color), transparent);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand i {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-content p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    position: relative;
}

.footer-links a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transform: translateX(-50%);
    transition: var(--transition-fast);
}

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

.footer-links a:hover::before {
    width: 80%;
}

/* =================================
   响应式设计
   ================================= */
@media (max-width: 1024px) {
    .sites-grid {
        grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        gap: 1.25rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .logo i {
        font-size: 1.5rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
        letter-spacing: 0.2em;
    }
    
    .hero-description {
        font-size: 1.125rem;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .stat-item {
        padding: 1.25rem 1.5rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .search-box {
        padding: 0.5rem 1rem;
    }
    
    .search-input {
        font-size: 1rem;
    }
    
    .sites-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 1rem;
    }
    
    .site-card {
        padding: 1.5rem;
    }
    
    .site-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-section {
        padding: 3rem 0 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .stat-item {
        padding: 1rem 1.25rem;
        min-width: 120px;
    }
    
    .sites-grid {
        grid-template-columns: 1fr;
    }
    
    .main {
        padding: 1.5rem 0;
    }
    
    .search-section {
        margin-bottom: 2rem;
    }
}

/* =================================
   滚动条样式
   ================================= */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* =================================
   动画效果
   ================================= */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(-20px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 0.8s linear infinite;
}

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