* {
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg-body);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

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

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

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

:root {
    --bg-body: #121212;
    --bg-card: #1e1e1e;
    --bg-sidebar: #252526;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #3e3e42;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --accent-text: #ffffff;
    --hover-bg: #2d2d30;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --input-bg: #2d2d2d;
    --input-border: #444;
    --btn-danger: #dc3545;
    --btn-danger-hover: #c82333;
}

body.light-mode {
    --bg-body: #f4f4f4;
    --bg-card: #ffffff;
    --bg-sidebar: #f8f9fa;
    --text-main: #333333;
    --text-muted: #666666;
    --border-color: #dee2e6;
    --accent-color: #007bff;
    --accent-hover: #0056b3;
    --accent-text: #ffffff;
    --hover-bg: #e9ecef;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --input-bg: #ffffff;
    --input-border: #ced4da;
    --btn-danger: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--bg-body);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

#top-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    margin: 0;
    color: var(--text-main);
}

/* Main Layout Wrapper */
#gallery-container {
    display: flex;
    flex: 1;
    height: auto;
    background: var(--bg-card);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
    overflow: hidden;
}

/* Vertical Tabs Sidebar */
#album-sidebar {
    width: 250px;
    min-width: 200px;
    flex-shrink: 0;
    background: var(--bg-sidebar);
    display: flex;
    flex-direction: column;
}

#album-list {
    overflow-y: auto;
    flex: 1;
}

.album-tab {
    padding: 15px 20px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
    transition: background 0.2s;
}

.album-tab:hover {
    background-color: var(--hover-bg);
}

.album-tab.active {
    background-color: var(--accent-color);
    color: var(--accent-text);
    border-color: var(--accent-color);
}

#sidebar-controls {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

#sidebar-controls select {
    width: 100%;
    padding: 6px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-main);
}

/* Resizer Bar */
#resizer {
    width: 5px;
    background-color: var(--border-color);
    cursor: col-resize;
    transition: background-color 0.2s;
}

#resizer:hover,
#resizer.active {
    background-color: var(--accent-color);
}

/* Content Area */
#album-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.album-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 15px;
    padding-bottom: 10px;
}

.album-controls {
    display: flex;
    gap: 10px;
}

.album-title {
    margin-top: 0;
    margin-bottom: 0;
    color: var(--text-main);
}

#download-album-btn {
    /* Base button style, shared with others usually, but keeping inline here as per existing css */
    padding: 8px 15px;
    background-color: var(--accent-color);
    color: var(--accent-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    display: none;
    /* Hidden by default */
}

#select-all-btn, #download-selected-btn {
    padding: 8px 15px;
    background-color: var(--bg-sidebar);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    display: none;
}

#download-album-btn:hover,
#select-all-btn:hover,
#download-selected-btn:hover {
    background-color: var(--accent-hover);
}

.album-date {
    font-size: 0.8em;
    color: var(--text-muted);
    margin-left: 10px;
    font-weight: normal;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.photo-card {
    position: relative;
    overflow: hidden;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.2s;
    background-color: var(--bg-card);
    box-shadow: 0 1px 3px var(--shadow-color);
}

.photo-card:hover {
    transform: scale(1.02);
}

.photo-card img,
.photo-card video {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    background-color: var(--hover-bg);
}

.select-chk {
    position: absolute;
    top: 8px;
    left: 8px;
    width: 20px;
    height: 20px;
    z-index: 10;
    cursor: pointer;
}

/* Spinner for infinite scroll */
#spinner {
    display: none;
    /* Hidden by default */
    margin: 20px auto;
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    /* Light grey */
    border-top: 4px solid var(--accent-color);
    /* Blue from theme */
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

    100% {
        transform: rotate(360deg);
    }
}

/* Lightbox Overlay */
#lightbox {
    display: none;
    position: fixed;
    z-index: 1000;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    justify-content: center;
    align-items: center;
}

#lightbox img,
#lightbox video {
    max-width: 90%;
    max-height: 90%;
    border: 5px solid var(--bg-card);
    border-radius: 4px;
    background: #000;
    object-fit: contain;
}

#exif-info {
    position: absolute;
    top: 20px;
    left: 20px;
    color: #fff;
    background: rgba(0, 0, 0, 0.6);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 14px;
    pointer-events: none;
    display: none;
}

#lightbox:after {
    content: "Click/Esc to close";
    color: white;
    position: absolute;
    bottom: 20px;
}

.prev,
.next {
    cursor: pointer;
    position: absolute;
    top: 50%;
    width: auto;
    padding: 16px;
    margin-top: -50px;
    color: white;
    font-weight: bold;
    font-size: 40px;
    transition: 0.6s ease;
    border-radius: 0 3px 3px 0;
    user-select: none;
}

.next {
    right: 0;
    border-radius: 3px 0 0 3px;
}

.prev {
    left: 0;
    border-radius: 3px 0 0 3px;
}

#slideshow-btn {
    position: absolute;
    bottom: 20px;
    left: 20px;
    padding: 10px 15px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    border: 1px solid white;
    border-radius: 4px;
    cursor: pointer;
    z-index: 1001;
    font-size: 14px;
}

#download-btn {
    position: absolute;
    bottom: 20px;
    right: 20px;
    padding: 10px 15px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    border: 1px solid white;
    border-radius: 4px;
    cursor: pointer;
    z-index: 1001;
    font-size: 14px;
    text-decoration: none;
}

#map-btn {
    position: absolute;
    bottom: 20px;
    left: 130px;
    padding: 10px 15px;
    background-color: rgba(0, 0, 0, 0.6);
    color: white;
    border: 1px solid white;
    border-radius: 4px;
    cursor: pointer;
    z-index: 1001;
    font-size: 14px;
    text-decoration: none;
    display: none;
}

.prev:hover,
.next:hover {
    background-color: rgba(0, 0, 0, 0.8);
}

/* Login Overlay */
#login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-body);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#login-box {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--shadow-color);
    text-align: center;
}

.password-wrapper {
    position: relative;
    width: 100%;
    max-width: 300px;
    margin: 0 auto 10px auto;
}

#toggle-password {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    font-size: 1.2rem;
    user-select: none;
    line-height: 1;
}

#login-box input {
    background: var(--input-bg);
    color: var(--text-main);
    padding: 10px;
    padding-right: 35px;
    margin-bottom: 0;
    border: 1px solid var(--input-border);
    border-radius: 4px;
    width: 100%;
    display: block;
    box-sizing: border-box;
}

#login-box button {
    padding: 10px 20px;
    background: var(--accent-color);
    color: var(--accent-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    touch-action: manipulation;
}

#login-box button:hover {
    background: var(--accent-hover);
}

#error-msg {
    color: red;
    margin-top: 10px;
    font-size: 14px;
    display: none;
}

.header-buttons {
    display: flex;
    gap: 10px;
    align-items: center;
}

#theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 1.2rem;
    line-height: 1;
    transition: background 0.2s;
}

#theme-toggle:hover {
    background: var(--hover-bg);
}

#logout-btn {
    padding: 8px 15px;
    background: var(--btn-danger);
    color: var(--accent-text);
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: none;
}

#logout-btn:hover {
    background: var(--btn-danger-hover);
}

@media (max-width: 768px) {
    #gallery-container {
        flex-direction: column;
    }

    #album-sidebar {
        width: 100% !important;
        /* Override inline width from JS resizer */
        height: 30vh;
        min-width: 0;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    #resizer {
        display: none;
    }
}