/* Custom CSS Variables for Seamless Light/Dark Theme Transition */
:root {
    --bg-color: #f4f6f9;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #6c757d;
    --border-color: #dee2e6;
    --sidebar-bg: #2c3e50;
    --sidebar-text: #ffffff;
    --sidebar-hover-bg: #34495e;
    --sidebar-active-bg: #1abc9c;
    --primary-accent: #0d6efd;
    --sticky-footer-bg: #ffffff;
    --sticky-footer-border: #e9ecef;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #e0e0e0;
    --text-muted: #a0a0a0;
    --border-color: #333333;
    --sidebar-bg: #1a1a1a;
    --sidebar-text: #e0e0e0;
    --sidebar-hover-bg: #2d2d2d;
    --sidebar-active-bg: #0d6efd;
    --primary-accent: #3700b3;
    --sticky-footer-bg: #1e1e1e;
    --sticky-footer-border: #2c2c2c;
}

/* Base resets & layouts */
html, body {
    height: 100%;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Wrapper structure to force sticky footer behavior */
#app-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

#main-layout {
    display: flex;
    flex: 1;
}

/* Sidebar Styling */
#sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    min-height: 100%;
    transition: all 0.3s ease;
    flex-shrink: 0;
    z-index: 1000;
}

#sidebar .sidebar-header {
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 700;
    letter-spacing: 0.5px;
}

#sidebar .nav-link {
    color: var(--sidebar-text);
    opacity: 0.8;
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-left: 4px solid transparent;
    transition: all 0.2s ease;
}

#sidebar .nav-link:hover {
    background-color: var(--sidebar-hover-bg);
    opacity: 1;
    border-left-color: var(--primary-accent);
}

#sidebar .nav-link.active {
    background-color: var(--sidebar-active-bg);
    opacity: 1;
    border-left-color: #ffffff;
    font-weight: 600;
}

/* Content Area */
#content-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Navbar overrides */
.navbar-custom {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 20px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Components card overrides */
.card-custom {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: background-color 0.3s ease, border-color 0.3s ease, transform 0.2s ease;
    margin-bottom: 24px;
}

.card-custom:hover {
    transform: translateY(-2px);
}

.card-title-custom {
    font-weight: 600;
    color: var(--text-color);
}

/* Form Styling overrides */
.form-control, .form-select {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.form-control:focus, .form-select:focus {
    background-color: var(--card-bg);
    color: var(--text-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

/* Tables styling */
.table-custom {
    background-color: var(--card-bg) !important;
    color: var(--text-color) !important;
    border-color: var(--border-color) !important;
}

.table-custom th {
    background-color: rgba(0, 0, 0, 0.03);
    color: var(--text-color);
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
}

.table-custom td {
    color: var(--text-color);
    vertical-align: middle;
}

/* Sticky Footer Styling */
#sticky-footer {
    background-color: var(--sticky-footer-bg);
    border-top: 1px solid var(--sticky-footer-border);
    padding: 15px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

/* Mobile Sidebar Toggle styling */
#sidebar-toggle-btn {
    display: none;
}

/* Responsive Styles */
@media (max-width: 991.98px) {
    #sidebar {
        margin-left: -260px;
        position: fixed;
        height: 100vh;
    }
    
    #sidebar.show {
        margin-left: 0;
    }
    
    #sidebar-toggle-btn {
        display: block;
    }
}

/* Custom modal dynamic updates */
.modal-content {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.modal-header, .modal-footer {
    border-color: var(--border-color);
}