:root {
    --bg-color-normal: transparent;
    --card-bg-normal: #ffffff86;
    --text-color-normal: #333333;
    --text-sub-normal: #666666;

    --bg-color-transparent: url('../images/bg-transparent.jpg'); /* Placeholder */
    --card-bg-transparent: rgba(255, 255, 255, 0.6);
    --text-color-transparent: #222222;
    --text-sub-transparent: #444444;

    --badge-bg-lv: #28a745;
    --badge-bg-huang: #ffc107;
    --badge-bg-chen: #d67200;
    --badge-bg-hong: #dc3545;
    --badge-bg-zi: #9f00be;
    --badge-bg-he: #944300;
}

.bg-lv {
    background-color: var(--badge-bg-lv);
    color: #000000;
}
.bg-huang {
    background-color: var(--badge-bg-huang);
    color: #000000;
}
.bg-chen {
    background-color: var(--badge-bg-chen);
    color: #ffffff;
}
.bg-hong {
    background-color: var(--badge-bg-hong);
    color: #ffffff;
}
.bg-zi {
    background-color: var(--badge-bg-zi);
    color: #ffffff;
}
.bg-he {
    background-color: var(--badge-bg-he);
    color: #ffffff;
}

body {
    transition: background 0.3s ease;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Theme: Normal */
body.theme-normal {
    background-color: var(--bg-color-normal);
    color: var(--text-color-normal);
}
.theme-normal .card {
    background-color: var(--card-bg-normal);
    border: 1px solid #e0e0e0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Theme: Transparent */
body.theme-transparent {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); /* Fallback/Default nice gradient */
    /* background-image: var(--bg-color-transparent); Use this if image available */
    background-attachment: fixed;
    color: var(--text-color-transparent);
}
body.theme-transparent .card {
    background-color: var(--card-bg-transparent);
    border: none;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Theme Switcher */
#theme-switcher {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    z-index: 9999;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    opacity: 0.7;
}
#theme-switcher:hover {
    transform: scale(1.1);
    opacity: 1;
}
#theme-switcher i {
    font-size: 24px;
    color: #333;
}

/* Common Layout */
.weather-icon {
    width: 64px;
    height: 64px;
}
.widget-card {
    /* height: 100%; Removed to allow auto height and avoid extra whitespace */
    padding: 20px;
}
.temp-large {
    font-size: 4rem;
    font-weight: bold;
}
.skycon-text {
    font-size: 1.5rem;
}

/* Alert Description Block */
.alert-desc-block {
    max-height: 300px; /* Limit height for very long alerts */
    overflow-y: auto; /* Scroll if too long */
}

/* Fix carousel item overlap issues */
.carousel-inner {
    overflow: visible; /* Ensure content isn't oddly clipped but height is respected */
}

.carousel-item {
    /* padding: 20px; Removed to prevent layout issues */
    min-height: 130px; /* Ensure enough height */
    transition: transform 0.6s ease-in-out; /* Standard bootstrap transition */
}

/* Ensure container row clears floats/flex properly */
.row {
    width: 100%;
    margin-right: 0;
    margin-left: 0;
}
.alert-card {
    border-left: 5px solid #ffc107;
    background-color: rgba(255, 255, 255, 0.9);
    height: 100%; /* Fill carousel item height */
    padding: 20px;
}

/* Alert Text Truncation */
.alert-desc {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 3em; /* Approximate 2 lines height */
}
.alert-card.red { border-left-color: #dc3545; }
.alert-card.orange { border-left-color: #fd7e14; }
.alert-card.yellow { border-left-color: #ffc107; }
.alert-card.blue { border-left-color: #0d6efd; }