/* ==========================================================================
   1. 主题变量定义区 (暗黑 / 亮白 / 深海蓝 / 赛博朋克 四皮肤配置)
   ========================================================================== */
:root {
    /* 暗黑主题 (Default Dark) */
    --bg-overlay: rgba(0, 0, 0, 0.22);
    --bg-mask: rgba(89, 89, 89, 0.15);
    --panel-bg: rgba(26, 28, 34, 0.9);
    --panel-border: rgba(255, 255, 255, 0.08);
    --footer-bg: rgba(18, 22, 30, 0.85);
    --text-main: #ffffff;
    --text-muted: #777777;
    --text-sub: #8e94a5;
    --accent-green: #00ff7f;
    --accent-green-bg: rgba(0, 255, 127, 0.2);
    --btn-bg: rgba(255, 255, 255, 0.05);
    --btn-disabled: #555555;
    --input-bg: rgba(255, 255, 255, 0.05);
    --input-border: rgba(255, 255, 255, 0.1);
    --tooltip-bg: rgba(22, 27, 37, 0.95);
    --dropdown-bg: rgba(22, 27, 37, 0.98);
}

body.light-theme {
    /* 亮白主题 (Light Theme) */
    --bg-overlay: rgba(255, 255, 255, 0.45);
    --bg-mask: rgba(255, 255, 255, 0.25);
    --panel-bg: rgba(255, 255, 255, 0.92);
    --panel-border: rgba(0, 0, 0, 0.08);
    --footer-bg: rgba(240, 243, 246, 0.92);
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --text-sub: #4b5563;
    --accent-green: #059669;
    --accent-green-bg: rgba(5, 150, 105, 0.15);
    --btn-bg: rgba(0, 0, 0, 0.04);
    --btn-disabled: #9ca3af;
    --input-bg: rgba(0, 0, 0, 0.04);
    --input-border: rgba(0, 0, 0, 0.12);
    --tooltip-bg: rgba(255, 255, 255, 0.98);
    --dropdown-bg: rgba(255, 255, 255, 0.98);
}

body.ocean-theme {
    /* 深海蓝主题 (Ocean Blue Theme) */
    --bg-overlay: rgba(8, 24, 43, 0.7);
    --bg-mask: rgba(14, 38, 64, 0.35);
    --panel-bg: rgba(13, 31, 56, 0.92);
    --panel-border: rgba(56, 189, 248, 0.18);
    --footer-bg: rgba(10, 25, 47, 0.9);
    --text-main: #f0f9ff;
    --text-muted: #64748b;
    --text-sub: #7dd3fc;
    --accent-green: #38bdf8;
    --accent-green-bg: rgba(56, 189, 248, 0.18);
    --btn-bg: rgba(56, 189, 248, 0.08);
    --btn-disabled: #334155;
    --input-bg: rgba(15, 39, 70, 0.6);
    --input-border: rgba(56, 189, 248, 0.22);
    --tooltip-bg: rgba(10, 28, 52, 0.96);
    --dropdown-bg: rgba(10, 28, 52, 0.98);
}

body.cyberpunk-theme {
    /* 赛博朋克主题 (Cyberpunk Neon Theme) */
    --bg-overlay: rgba(20, 10, 35, 0.75);
    --bg-mask: rgba(45, 15, 60, 0.3);
    --panel-bg: rgba(28, 16, 44, 0.92);
    --panel-border: rgba(244, 63, 94, 0.28);
    --footer-bg: rgba(20, 11, 33, 0.9);
    --text-main: #fdf2f8;
    --text-muted: #9d8ba7;
    --text-sub: #f472b6;
    --accent-green: #f43f5e;
    --accent-green-bg: rgba(244, 63, 94, 0.22);
    --btn-bg: rgba(244, 63, 94, 0.1);
    --btn-disabled: #4c1d40;
    --input-bg: rgba(35, 18, 55, 0.7);
    --input-border: rgba(244, 63, 94, 0.3);
    --tooltip-bg: rgba(28, 14, 43, 0.96);
    --dropdown-bg: rgba(28, 14, 43, 0.98);
}

/* ==========================================================================
   2. 全局通用基础样式
   ========================================================================== */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: 
        linear-gradient(var(--bg-overlay), var(--bg-overlay)),
        url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?q=80&w=2000') center/cover no-repeat fixed;
    background-blend-mode: multiply;
    font-family: 'Segoe UI', system-ui, sans-serif;
    overflow-y: auto;
    padding: 15px 0;
    color: var(--text-main);
    transition: background 0.3s ease, color 0.3s ease;
}

body::before {
    content: "";
    position: fixed;
    top: 0; 
    left: 0; 
    width: 100%; 
    height: 100%;
    background: var(--bg-mask);
    z-index: -1;
}

.main-floating-title {
    color: var(--text-main);
    font-size: 32px;
    font-weight: 600;
    letter-spacing: 4px;
    text-transform: uppercase;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    margin: 20px 0 12px;
    text-align: center;
    z-index: 2;
}

/* 按钮组与单选框 */
.btn-group {
    display: inline-flex;
    gap: 6px;
    background: var(--btn-bg);
    padding: 4px;
    border-radius: 12px;
    align-items: center;
}

.btn-group label input {
    display: none !important;
}

.btn-group label span {
    display: inline-block;
    padding: 6px 14px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 8px;
    cursor: pointer;
    transition: 0.25s;
    user-select: none;
}

.btn-group label input:checked + span {
    background: var(--accent-green-bg) !important;
    color: var(--accent-green) !important;
}

.btn-disabled {
    opacity: 0.35;
    cursor: not-allowed !important;
    color: var(--btn-disabled) !important;
    padding: 6px 14px;
    font-size: 11px;
    font-weight: 600;
    user-select: none;
}

/* 页面导航按钮 */
.lab-btn, .kline-btn {
    background: var(--btn-bg);
    border: none;
    color: var(--text-sub);
    padding: 9px 16px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.lab-btn:hover, .kline-btn:hover {
    background: var(--accent-green-bg);
    color: var(--accent-green);
    transform: translateY(-1px);
}

/* 主题切换下拉框 */
.theme-select {
    background: var(--input-bg);
    border: 1px solid var(--panel-border);
    color: var(--accent-green);
    padding: 6px 10px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.25s;
    outline: none;
    font-family: inherit;
}

.theme-select:hover, .theme-select:focus {
    border-color: var(--accent-green);
    background: var(--accent-green-bg);
}

.theme-select option {
    background: var(--dropdown-bg);
    color: var(--text-main);
    font-weight: normal;
}

/* Tooltip 浮窗 */
.custom-tooltip {
    width: 90px;
    position: absolute;
    display: none;
    padding: 12px;
    z-index: 1000;
    pointer-events: none;
    border-radius: 10px;
    background: var(--tooltip-bg);
    border: 0.25px solid var(--panel-border);
    color: var(--text-main);
    font-size: 11px;
    font-family: monospace;
    line-height: 1.5;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* 版权区 */
.footer-copyright {
    text-align: center;
    margin: 25px auto 15px;
    font-size: 10px;
    color: var(--text-muted);
    max-width: 1000px;
    line-height: 1.5;
}

/* ==========================================================================
   3. kline.html 专用样式
   ========================================================================== */
#chart-wrapper {
    position: relative;
    z-index: 1;
    padding: 12px 20px 25px 20px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(1px);
    border-radius: 24px;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.6);
    width: min(900px, 95vw);
}

.pixel-hamster {
    position: absolute;
    top: -47px;
    left: 50px;
    width: 50px;
    image-rendering: pixelated;
    filter: drop-shadow(0 6px 6px rgba(0, 0, 0, 0.4));
}

#main-chart-container {
    width: 100%;
    height: 400px;
    position: relative;
}

.header-panel {
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-panel {
    z-index: 1;
    margin: 15px auto 0;
    padding: 15px 40px;
    background: var(--footer-bg);
    border-radius: 22px;
    color: var(--text-main);
    border: 1px solid var(--panel-border);
    width: min(600px, 90vw);
}

.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.footer-item span {
    color: var(--text-muted);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.footer-item b {
    color: var(--text-main) !important;
    font-size: 10px;
    font-weight: 300;
    font-family: 'Consolas', monospace;
}

.city-select {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--accent-green);
    font-size: 11px;
    font-weight: bold;
    padding: 6px 10px;
    border-radius: 6px;
    outline: none;
}

#globe-container {
    position: fixed;
    bottom: 60px;
    right: 58px;
    width: 100px;
    height: 100px;
    z-index: 9999;
    cursor: pointer;
    border-radius: 50%;
    overflow: hidden;
    background: transparent;
    transform-origin: center center;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#globe-container:hover {
    transform: scale(2.2) rotate(10deg);
}

#selected-city-display {
    position: fixed;
    bottom: 48px;
    right: 84px;
    color: #FEFAE0;
    font-size: 9px;
    font-weight: 500;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.7);
    pointer-events: none;
    z-index: 9998;
    letter-spacing: 0.5px;
}

.social-links {
    position: fixed;
    bottom: 35px;
    left: 40px;
    display: flex;
    gap: 20px;
    z-index: 10000;
}

.social-links a {
    color: var(--text-muted);
    font-size: 20px;
    transition: 0.3s;
    text-decoration: none;
}

.social-links a:hover {
    color: var(--accent-green);
    transform: translateY(-3px);
}

/* ==========================================================================
   4. lab.html 专用样式
   ========================================================================== */
.chart-wrapper {
    position: relative;
    z-index: 1;
    width: min(1100px, 98vw); 
    padding: 10px 20px 15px 20px; 
    background: var(--panel-bg);
    margin: 0 auto 15px auto;
    border: 1px solid var(--panel-border);
    backdrop-filter: blur(1px);
    border-radius: 16px; 
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.6);
}

.search-container { 
    position: relative; 
    max-width: 300px; 
}

.search-input {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--accent-green); 
    font-size: 11px;
    font-weight: bold;
    padding: 6px 10px;
    border-radius: 8px;
    width: 140px;
    outline: none;
    transition: border-color 0.2s;
}
.search-input:focus { 
    border-color: var(--accent-green); 
}

.dropdown {
    position: absolute; 
    top: 100%; 
    left: 0; 
    right: 0; 
    background: var(--dropdown-bg);
    border: 1px solid rgba(0, 255, 127, 0.3); 
    border-top: none; 
    max-height: 200px;
    overflow-y: auto; 
    display: none; 
    z-index: 1000; 
    border-radius: 0 0 8px 8px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.6);
}
.dropdown.show { 
    display: block; 
}

.dropdown-item { 
    padding: 7px 11px; 
    cursor: pointer; 
    font-size: 12px; 
    font-weight: bold; 
    color: var(--text-main);
    border-bottom: 1px solid rgba(255, 255, 255, 0.04); 
}
.dropdown-item:hover { 
    background: var(--accent-green-bg); 
    color: var(--accent-green); 
}

.main-chart-container {
    width: 100%;
    height: 300px;
    position: relative;
    background: transparent;
}