/* ========================================
   美股TOP50 - 酷炫样式表
   ======================================== */

/* CSS变量定义 */
:root {
    /* 主题色 */
    --primary-cyan: #00f5ff;
    --primary-purple: #7b2cbf;
    --primary-pink: #ff006e;
    --primary-green: #00ff88;
    --primary-red: #ff3366;
    --primary-gold: #ffd700;
    
    /* 背景色 */
    --bg-dark: #0a0a1a;
    --bg-card: rgba(20, 20, 40, 0.8);
    --bg-card-hover: rgba(30, 30, 60, 0.9);
    
    /* 文字色 */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
    
    /* 渐变 */
    --gradient-main: linear-gradient(135deg, #00f5ff 0%, #7b2cbf 50%, #ff006e 100%);
    --gradient-up: linear-gradient(135deg, #00ff88 0%, #00cc6a 100%);
    --gradient-down: linear-gradient(135deg, #ff3366 0%, #cc1144 100%);
    --gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    
    /* 阴影 */
    --shadow-glow-cyan: 0 0 30px rgba(0, 245, 255, 0.3);
    --shadow-glow-purple: 0 0 30px rgba(123, 44, 191, 0.3);
    --shadow-glow-pink: 0 0 30px rgba(255, 0, 110, 0.3);
    
    /* 边框 */
    --border-glass: 1px solid rgba(255, 255, 255, 0.1);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* 粒子背景 */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(180deg, 
        #0a0a1a 0%, 
        #0f0f2d 30%, 
        #1a1a3e 60%, 
        #0a0a1a 100%
    );
}

/* 主容器 */
.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 20px;
    position: relative;
    z-index: 1;
}

/* ========================================
   头部样式
   ======================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: var(--border-glass);
    backdrop-filter: blur(20px);
    margin-bottom: 30px;
    animation: slideDown 0.6s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-glass);
    border-radius: var(--radius-md);
    padding: 10px;
    border: var(--border-glass);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        box-shadow: var(--shadow-glow-cyan);
    }
    50% {
        box-shadow: var(--shadow-glow-purple);
    }
}

.stock-icon {
    width: 100%;
    height: 100%;
}

.main-title {
    display: flex;
    flex-direction: column;
}

.title-text {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    text-shadow: 0 0 30px rgba(0, 245, 255, 0.5);
}

.title-sub {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.market-status {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 25px;
    background: var(--gradient-glass);
    border-radius: var(--radius-xl);
    border: var(--border-glass);
}

.status-indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-muted);
    animation: statusPulse 1.5s ease-in-out infinite;
}

.market-status.open .status-indicator {
    background: var(--primary-green);
    box-shadow: 0 0 15px rgba(0, 255, 136, 0.6);
}

.market-status.closed .status-indicator {
    background: var(--primary-red);
    box-shadow: 0 0 15px rgba(255, 51, 102, 0.6);
}

.market-status.pre .status-indicator,
.market-status.after .status-indicator {
    background: var(--primary-gold);
    box-shadow: 0 0 15px rgba(255, 215, 0, 0.6);
}

@keyframes statusPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.7;
    }
}

.status-text {
    font-family: 'Orbitron', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 1px;
}

/* ========================================
   时间展示区域
   ======================================== */
.time-section {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.time-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: var(--border-glass);
    backdrop-filter: blur(20px);
    padding: 25px;
    position: relative;
    overflow: hidden;
    transition: var(--transition-normal);
}

.time-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-main);
}

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

.time-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.card-icon {
    font-size: 1.5rem;
}

.time-card-header h2 {
    font-family: 'Orbitron', monospace;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.time-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.time-block {
    padding: 15px;
    background: var(--gradient-glass);
    border-radius: var(--radius-md);
    border: var(--border-glass);
}

.time-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.time-dual {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.time-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.flag {
    font-size: 1.2rem;
}

.time-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-cyan);
}

/* 倒计时卡片 */
.countdown-card {
    display: flex;
    flex-direction: column;
}

.countdown-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.countdown-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--gradient-glass);
    padding: 20px 25px;
    border-radius: var(--radius-md);
    border: var(--border-glass);
    min-width: 80px;
}

.countdown-value {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.countdown-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 8px;
}

.countdown-separator {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    color: var(--primary-purple);
    animation: blink 1s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

/* 当前时间卡片 */
.current-times {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.current-time-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--gradient-glass);
    border-radius: var(--radius-md);
    border: var(--border-glass);
}

.current-time-value {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    flex: 1;
}

.timezone-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========================================
   统计概览
   ======================================== */
.stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
    animation: fadeInUp 0.6s ease 0.4s both;
}

.stat-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: var(--border-glass);
    backdrop-filter: blur(20px);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
}

.stat-card:nth-child(1)::before {
    background: var(--gradient-up);
}

.stat-card:nth-child(2)::before {
    background: var(--gradient-down);
}

.stat-card:nth-child(3)::before {
    background: linear-gradient(90deg, #888 0%, #aaa 100%);
}

.stat-card:nth-child(4)::before {
    background: var(--gradient-main);
}

.stat-card:hover {
    transform: translateY(-5px);
    background: var(--bg-card-hover);
}

.stat-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-glass);
    border-radius: var(--radius-md);
    border: var(--border-glass);
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ========================================
   股票列表
   ======================================== */
.stocks-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: var(--border-glass);
    backdrop-filter: blur(20px);
    padding: 30px;
    animation: fadeInUp 0.6s ease 0.6s both;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: var(--border-glass);
}

.section-header h2 {
    font-family: 'Orbitron', monospace;
    font-size: 1.3rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

.refresh-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

#lastUpdate {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.refresh-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--gradient-main);
    border: none;
    border-radius: var(--radius-xl);
    color: white;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.refresh-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow-cyan);
}

.refresh-btn:active {
    transform: scale(0.98);
}

.refresh-btn.loading svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 股票网格 */
.stocks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* 加载占位符 */
.loading-placeholder {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px;
    gap: 20px;
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(0, 245, 255, 0.2);
    border-top-color: var(--primary-cyan);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-placeholder p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* 股票卡片 */
.stock-card {
    background: var(--gradient-glass);
    border-radius: var(--radius-md);
    border: var(--border-glass);
    padding: 20px;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.stock-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-main);
    opacity: 0;
    transition: var(--transition-normal);
}

.stock-card:hover {
    transform: translateY(-5px) scale(1.02);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow-glow-purple);
}

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

.stock-card.up {
    border-left: 3px solid var(--primary-green);
}

.stock-card.down {
    border-left: 3px solid var(--primary-red);
}

.stock-card.flat {
    border-left: 3px solid #888;
}

.stock-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.stock-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stock-symbol {
    font-family: 'Orbitron', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stock-name {
    font-size: 0.8rem;
    color: var(--text-secondary);
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stock-rank {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--gradient-main);
    border-radius: 50%;
    font-family: 'Orbitron', monospace;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
}

.stock-price {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.stock-change {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.change-value, .change-percent {
    font-family: 'Orbitron', monospace;
    font-size: 0.95rem;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: var(--radius-sm);
}

.stock-card.up .change-value,
.stock-card.up .change-percent {
    background: rgba(0, 255, 136, 0.15);
    color: var(--primary-green);
}

.stock-card.down .change-value,
.stock-card.down .change-percent {
    background: rgba(255, 51, 102, 0.15);
    color: var(--primary-red);
}

.stock-card.flat .change-value,
.stock-card.flat .change-percent {
    background: rgba(136, 136, 136, 0.15);
    color: #888;
}

.stock-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    padding-top: 15px;
    border-top: var(--border-glass);
}

.meta-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.meta-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.meta-value {
    font-family: 'Orbitron', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ========================================
   页脚
   ======================================== */
.footer {
    text-align: center;
    padding: 30px;
    margin-top: 40px;
    color: var(--text-muted);
    font-size: 0.85rem;
    animation: fadeInUp 0.6s ease 0.8s both;
}

.footer p {
    margin: 5px 0;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1200px) {
    .time-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .time-card:first-child {
        grid-column: span 2;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }
    
    .title-text {
        font-size: 1.5rem;
    }
    
    .time-section {
        grid-template-columns: 1fr;
    }
    
    .time-card:first-child {
        grid-column: span 1;
    }
    
    .countdown-unit {
        padding: 15px 20px;
        min-width: 60px;
    }
    
    .countdown-value {
        font-size: 1.8rem;
    }
    
    .stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .section-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .stocks-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .title-text {
        font-size: 1.2rem;
    }
    
    .countdown-value {
        font-size: 1.5rem;
    }
    
    .stock-price {
        font-size: 1.4rem;
    }
    
    .current-time-value {
        font-size: 1.3rem;
    }
}

/* ========================================
   特效动画
   ======================================== */
@keyframes shimmer {
    0% {
        background-position: -200% center;
    }
    100% {
        background-position: 200% center;
    }
}

.stock-card.updating {
    animation: shimmer 1.5s ease-in-out;
    background: linear-gradient(
        90deg,
        rgba(20, 20, 40, 0.8) 0%,
        rgba(40, 40, 80, 0.8) 50%,
        rgba(20, 20, 40, 0.8) 100%
    );
    background-size: 200% 100%;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gradient-main);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-cyan);
}

/* 选择文本样式 */
::selection {
    background: var(--primary-purple);
    color: white;
}