:root {
    --primary-color: #0D7C7D;
    --secondary-color: #13999A;
    --bg-light: #f8f9fa;
    --text-dark: #333;
    --sidebar-width: 250px;
    
    /* Theme Variables - Light Mode (Default) */
    --bg-body: #e8f5e9;
    --bg-card: #fff;
    --bg-sidebar: #fff;
    --text-main: #333;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --shadow-color: rgba(0,0,0,0.05);
    --navbar-bg: #212529; /* Bootstrap dark default */
    --navbar-text: #fff;
    --footer-bg: #fff;
    --footer-text: #0D7C7D;
    --input-bg: #fff;
    --input-text: #212529;
    --input-border: #ced4da;
    --nav-link-hover: #f8f9fa;
    --nav-link-active-bg: #e0f2f1;
}

[data-theme="dark"] {
    --bg-body: #121212;
    --bg-card: #1e1e1e;
    --bg-sidebar: #1e1e1e;
    --text-main: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #333;
    --shadow-color: rgba(0,0,0,0.3);
    --navbar-bg: #000;
    --navbar-text: #e0e0e0;
    --footer-bg: #1e1e1e;
    --footer-text: #0D7C7D; /* Keep primary color or adjust if needed */
    --input-bg: #2d2d2d;
    --input-text: #e0e0e0;
    --input-border: #444;
    --nav-link-hover: #2d2d2d;
    --nav-link-active-bg: #0a2e2e; /* Darker version of active bg */
}

/* Dark Mode Specific Overrides */
[data-theme="dark"] .messages-header {
    background-color: #0A6263 !important; /* Fixed Teal Color */
    color: #ffffff !important;
}

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    background-image: none; /* Remove SVG pattern in dark mode or handle carefully */
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
    padding-bottom: 100px; /* Extra space to avoid fixed footer overlap on small screens */
}

/* Re-apply pattern only for light mode if desired, or just use solid color for simplicity and dark mode compatibility */
/* For now, we keep simple solid background for dark mode consistency */
[data-theme="light"] body {
     background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230D7C7D' fill-opacity='0.05'%3E%3Cpath d='M28 10h4v15h15v4h-15v21h-4v-21h-15v-4h15z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.fixed-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--footer-bg);
    color: var(--footer-text);
    text-align: center;
    padding: 10px 0; /* Reduced padding */
    box-shadow: 0 -2px 5px var(--shadow-color);
    z-index: 1030;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-size: 0.9rem; /* Reduced font size */
}
.header-logo {
    max-width: 200px;
    display: block;
    margin: 20px auto;
}
.form-section {
    background: var(--bg-card);
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow-color);
    border-top: 5px solid var(--primary-color);
    transition: background-color 0.3s ease;
}
h1, h2, h3, h4, h5, h6 {
    color: var(--primary-color);
}
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: #0a6263;
    border-color: #0a6263;
}
#camera-container {
    width: 100%;
    max-width: 320px;
    margin: 0 auto;
    text-align: center;
}
#video, #canvas, #photo {
    width: 100%;
    border-radius: 8px;
}
.hidden {
    display: none;
}
footer {
    margin-top: 40px;
    padding: 20px;
    text-align: center;
    font-weight: bold;
    color: var(--primary-color);
}
/* Admin specific overrides */
.card-header {
    background-color: var(--primary-color);
    color: white;
}

/* Dashboard & Sidebar */
.admin-wrapper {
    display: flex;
    min-height: calc(100vh - 56px); /* Navbar height approx */
    width: 100%;
}
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    box-shadow: 2px 0 5px var(--shadow-color);
    padding-top: 20px;
    flex-shrink: 0;
    transition: background-color 0.3s ease;
}
.sidebar .nav-link {
    color: var(--text-main);
    padding: 12px 20px;
    border-radius: 0;
    border-left: 4px solid transparent;
    transition: all 0.2s;
    text-align: left;
    display: flex;
    align-items: center;
    width: 100%;
}
.sidebar .nav-link:hover {
    background-color: var(--nav-link-hover);
    color: var(--primary-color);
}
.sidebar .nav-link.active {
    background-color: var(--nav-link-active-bg);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    font-weight: 600;
}
.sidebar .nav-link i {
    margin-right: 10px;
    width: 20px;
    text-align: center;
}
/* Content Wrapper to ensure full width */
.content-wrapper {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0; /* Prevents flex items from overflowing */
    width: 100%;
}

.main-content {
    flex-grow: 1;
    padding: 20px;
    overflow-x: auto;
    width: 100%;
}

.tab-content, .tab-pane {
    width: 100%;
}

/* Dashboard Cards */
.stat-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow-color);
    transition: transform 0.2s, background-color 0.3s ease;
    background: var(--bg-card);
    overflow: hidden;
}
.stat-card:hover {
    transform: translateY(-5px);
}
.stat-card .card-body {
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.stat-card .stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}
.stat-card .stat-title {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}
.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
}
.bg-icon-primary { background-color: rgba(13, 124, 125, 0.1); color: var(--primary-color); }
.bg-icon-warning { background-color: rgba(255, 193, 7, 0.1); color: #ffc107; }
.bg-icon-success { background-color: rgba(25, 135, 84, 0.1); color: #198754; }
.bg-icon-info { background-color: rgba(13, 202, 240, 0.1); color: #0dcaf0; }

/* Dark Mode Overrides for Bootstrap Components */
[data-theme="dark"] .modal-content {
    background-color: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-header,
[data-theme="dark"] .modal-footer {
    border-color: var(--border-color);
}

[data-theme="dark"] .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

[data-theme="dark"] .table {
    color: var(--text-main);
    border-color: var(--border-color);
    --bs-table-color: var(--text-main);
    --bs-table-bg: var(--bg-card);
    --bs-table-border-color: var(--border-color);
    --bs-table-striped-bg: rgba(255, 255, 255, 0.05);
    --bs-table-striped-color: var(--text-main);
    --bs-table-active-bg: rgba(255, 255, 255, 0.1);
    --bs-table-active-color: var(--text-main);
    --bs-table-hover-bg: rgba(255, 255, 255, 0.075);
    --bs-table-hover-color: var(--text-main);
}

[data-theme="dark"] .form-control,
[data-theme="dark"] .form-select {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--input-border);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .form-select:focus {
    background-color: var(--input-bg);
    color: var(--input-text);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 124, 125, 0.25);
}

[data-theme="dark"] .form-control::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] .form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}

[data-theme="dark"] .form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

[data-theme="dark"] .form-check-input {
    background-color: var(--input-bg);
    border-color: var(--input-border);
}

[data-theme="dark"] .form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

[data-theme="dark"] .card {
    background-color: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-color);
}

[data-theme="dark"] .bg-light {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
}

[data-theme="dark"] .bg-white {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
}

[data-theme="dark"] .list-group-item {
    background-color: var(--bg-card);
    color: var(--text-main);
    border-color: var(--border-color);
}

[data-theme="dark"] .list-group-item-action:hover,
[data-theme="dark"] .list-group-item-action:focus {
    background-color: var(--nav-link-hover);
    color: var(--text-main);
}

[data-theme="dark"] .table thead.table-light,
[data-theme="dark"] .table tbody.table-light,
[data-theme="dark"] .table .table-light {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

.notification-item {
    border-left: 3px solid var(--primary-color);
    background-color: var(--bg-card);
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 4px;
    box-shadow: 0 2px 4px var(--shadow-color);
    transition: background-color 0.3s ease;
}
.notification-item.unread {
    background-color: var(--nav-link-active-bg);
}
.notification-dot {
    height: 10px;
    width: 10px;
    background-color: #dc3545;
    border-radius: 50%;
    display: inline-block;
    margin-right: 5px;
}

[data-theme="dark"] .logo-light {
    display: none !important;
}
[data-theme="dark"] .logo-dark {
    display: inline-block !important;
}

@media (max-width: 768px) {
    .admin-wrapper {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        padding: 0;
        background-color: var(--bg-sidebar);
        border-bottom: 1px solid var(--border-color);
        /* position: sticky;  -- Removed sticky to avoid conflict with top navbar */
        /* top: 0; */
        z-index: 1000;
        box-shadow: 0 2px 5px var(--shadow-color);
    }
    
    .sidebar-logo {
        margin-bottom: 0;
        border-bottom: none;
    }
    
    .sidebar-logo img {
        max-height: 120px !important;
        transition: max-height 0.3s ease;
    }

    .sidebar .nav {
        flex-direction: row !important;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding: 6px 12px 8px 12px;
        gap: 8px;
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    /* Styled scrollbar for better visibility */
    .sidebar .nav::-webkit-scrollbar {
        height: 4px;
        display: block;
    }
    .sidebar .nav::-webkit-scrollbar-thumb {
        background-color: var(--primary-color);
        border-radius: 4px;
        opacity: 0.7;
    }
    .sidebar .nav::-webkit-scrollbar-track {
        background: rgba(0,0,0,0.05);
    }
    .sidebar .nav {
        scrollbar-width: thin;
        scrollbar-color: var(--primary-color) transparent;
    }
    
    .sidebar .nav-link {
        white-space: nowrap;
        border: 1px solid var(--border-color);
        border-radius: 20px !important; /* Pill shape on mobile */
        padding: 3px 8px;
        font-size: 0.75rem;
        background-color: var(--bg-card);
        color: var(--text-main);
        display: inline-flex;
        width: auto;
        align-items: center;
        flex-shrink: 0;
    }
    .sidebar .nav-link i {
        margin-right: 6px;
        font-size: 1.1em;
    }
    .sidebar .nav-link.active {
        background-color: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }
    
    .main-content {
        padding: 15px;
    }
    
    /* Adjust Dashboard Cards for Mobile */
    .stat-card {
        margin-bottom: 10px;
    }
    .stat-card .card-body {
        padding: 15px;
    }
    .stat-card .stat-value {
        font-size: 1.5rem;
    }
}

/* Ensure nav items don't stretch awkwardly */
.sidebar .nav .nav-link {
    flex: 0 0 auto;
    white-space: nowrap;
}

/* Extra-small screens fine-tuning */
@media (max-width: 576px) {
    .sidebar .nav .nav-link {
        padding: 8px 10px;
        font-size: 0.9rem;
        border-radius: 0.5rem !important;
    }
    .navbar .container-fluid .d-flex.gap-2 {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
        row-gap: 6px;
    }
    .navbar .navbar-brand {
        font-size: 1rem;
        max-width: 70%;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
}