:root {
    /* 浅色主题 */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --accent: #3498db;
    --accent-hover: #2980b9;
    --border: #e1e8ed;
    --shadow: rgba(0, 0, 0, 0.1);
    --loading-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] {
    /* 深色主题 */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --accent: #00d4ff;
    --accent-hover: #0099cc;
    --border: #404040;
    --shadow: rgba(0, 0, 0, 0.3);
    --loading-bg: rgba(45, 45, 45, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    transition: all 0.3s ease;
}

.container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.header-compact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 3px var(--shadow);
    height: 60px;
    flex-shrink: 0;
}

.header-compact h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.panorama-container {
    position: relative;
    flex: 1;
    min-height: 0;
}

.panorama {
    width: 100%;
    height: 100%;
}

.overlay-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
    z-index: 1000;
}

.location-info.compact {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    box-shadow: 0 2px 8px var(--shadow);
    max-width: 80%;
    text-align: center;
    word-wrap: break-word;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

.btn {
    padding: 12px;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px var(--shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    font-size: 1.2rem;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
}

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

.btn.primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.btn.secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn.secondary:hover {
    background: var(--accent);
    color: white;
    transform: translateY(-2px);
}

.btn.theme-toggle {
    background: var(--bg-secondary);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
}

.btn.theme-toggle:hover {
    background: var(--accent);
    color: white;
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--loading-bg);
    color: var(--text-primary);
    padding: 15px 25px;
    border-radius: 25px;
    font-size: 1rem;
    display: none;
    z-index: 1001;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    box-shadow: 0 4px 12px var(--shadow);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 8px;
    border: 2px solid var(--border);
    border-top: 2px solid var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .header-compact {
        padding: 10px 15px;
        height: 50px;
    }
    
    .header-compact h1 {
        font-size: 1.3rem;
    }
    
    .overlay-controls {
        top: 15px;
        right: 15px;
    }
    
    .btn {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }
    
    .location-info.compact {
        bottom: 15px;
        font-size: 0.85rem;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .header-compact {
        padding: 8px 12px;
        height: 45px;
    }
    
    .header-compact h1 {
        font-size: 1.2rem;
    }
    
    .btn {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* 全屏模式优化 */
body:fullscreen .header-compact {
    display: none;
}

body:fullscreen .panorama-container {
    height: 100vh;
}

body:-webkit-full-screen .header-compact {
    display: none;
}

body:-webkit-full-screen .panorama-container {
    height: 100vh;
}

body:-moz-full-screen .header-compact {
    display: none;
}

body:-moz-full-screen .panorama-container {
    height: 100vh;
}

body:-ms-fullscreen .header-compact {
    display: none;
}

body:-ms-fullscreen .panorama-container {
    height: 100vh;
}