:root {
    --primary-color: #594545;
    --muted-color: #6b7280;

    --white: #ffffff;
    --black: #000000;

    --sidebar-footer-bg: #9e7676;
    --sidebar-text-50: rgba(255, 255, 255, 0.5);
    --sidebar-text-25: rgba(255, 255, 255, 0.25);
    --sidebar-link-60: rgba(255, 255, 255, 0.6);
    --sidebar-link-hover: #ffffff;

    --surface-bg: #ffffff;
    --surface-radius: 14px;
    --surface-shadow: 0px 0px 8px -3px var(--primary-color);

    --table-header-bg: #fafafa;
    --table-header-text: #6b7280;
    --table-header-border: #e5e7eb;

    --table-separator: #f1f5f9;
    --table-row-hover-bg: #f9fafb;

    --cell-padding-y: 15px;
    --cell-padding-x: 18px;

    --preview-shadow: rgba(0, 0, 0, 0.1);
    --preview-shadow-hover: rgba(0, 0, 0, 0.15);

    --avatar-border: #f1f5f9;

    --table-header-bg-alt: #f8f9fa;

    --primary-custom: #6366f1;
    --primary-custom-hover: #4f46e5;
    --primary-custom-hover-shadow: rgba(99, 102, 241, 0.3);
}

/* Layout shell */
html,
body {
    height: 100%;
}

body.sb-nav-fixed {
    padding-top: 56px;
}

.nav .nav-link .sb-nav-link-icon,
.sb-sidenav-menu .nav-link .sb-nav-link-icon {
    margin-right: 0.5rem;
}

#layoutSidenav {
    display: flex;
}

#layoutSidenav #layoutSidenav_nav {
    flex-basis: 225px;
    flex-shrink: 0;
    transition: transform 0.15s ease-in-out;
    z-index: 1038;
    transform: translateX(-225px);
}

#layoutSidenav #layoutSidenav_content {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-width: 0;
    flex-grow: 1;
    min-height: calc(100vh - 56px);
    margin-left: -225px;
}

.sb-sidenav-toggled #layoutSidenav #layoutSidenav_nav {
    transform: translateX(0);
}

@media (min-width: 992px) {
    #layoutSidenav #layoutSidenav_nav {
        transform: translateX(0);
    }

    #layoutSidenav #layoutSidenav_content {
        margin-left: 0;
        transition: margin 0.15s ease-in-out;
    }
}

.sb-nav-fixed #layoutSidenav #layoutSidenav_nav {
    width: 225px;
    height: 100vh;
    z-index: 1038;
}

.sb-nav-fixed #layoutSidenav #layoutSidenav_content {
    /* Sidebar already occupies space in flex layout; avoid double offset */
    padding-left: 0;
    top: 0;
}

.sb-topnav {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    padding-left: 0;
    height: 56px;
    z-index: 1039;
}

/* Make topbar match sidebar color */
.sb-topnav.navbar-dark.bg-dark {
    background-color: var(--primary-color) !important;
    border-color: var(--primary-color) !important;
}

.sb-topnav .navbar-brand {
    width: 225px;
    margin: 0;
}

.sb-topnav.navbar-dark #sidebarToggle {
    color: var(--sidebar-text-50);
    border: none;
}

.sb-sidenav {
    display: flex;
    flex-direction: column;
    height: 100%;
    flex-wrap: nowrap;
}

.sb-sidenav .sb-sidenav-menu {
    flex-grow: 1;
}

.sb-sidenav .sb-sidenav-menu .nav {
    flex-direction: column;
    flex-wrap: nowrap;
}

.sb-sidenav .sb-sidenav-menu .nav .sb-sidenav-menu-heading {
    padding: 1.75rem 1rem 0.75rem;
    font-size: 0.75rem;
    font-weight: bold;
    text-transform: uppercase;
}

.sb-sidenav .sb-sidenav-menu .nav .nav-link {
    display: flex;
    align-items: center;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    position: relative;
}

.sb-sidenav .sb-sidenav-menu .nav .nav-link .sb-nav-link-icon {
    font-size: 0.9rem;
}

.sb-sidenav .sb-sidenav-footer {
    padding: 0.75rem;
    flex-shrink: 0;
}

.sb-sidenav-dark {
    background-color: var(--primary-color);
    color: var(--sidebar-text-50);
}

.sb-sidenav-dark .sb-sidenav-menu .sb-sidenav-menu-heading {
    color: var(--sidebar-text-25);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link {
    color: var(--sidebar-text-50);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link .sb-nav-link-icon {
    color: var(--sidebar-text-25);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link:hover {
    color: var(--white);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link.active {
    color: var(--white);
}

.sb-sidenav-dark .sb-sidenav-menu .nav-link.active .sb-nav-link-icon {
    color: var(--white);
}

.sb-sidenav-dark .sb-sidenav-footer {
    background-color: var(--sidebar-footer-bg);
}

/* Used in modal close buttons */
.btn-close-white {
    filter: invert(1) grayscale(100%) contrast(200%);
}

/* Page spacing + components */
.page-shell {
    margin: 0 auto;
}

.breadcrumb-modern {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--muted-color);
    margin-bottom: 12px;
}

.breadcrumb-modern a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.breadcrumb-modern span {
    color: var(--muted-color);
}

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

.page-heading {
    font-size: 1.45rem;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.02em;
}

.page-subtitle {
    margin-top: 4px;
    font-size: 0.875rem;
    color: var(--muted-color);
}

.btn {
    border: none;
    padding: 0.55rem 1rem;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background 0.15s ease, transform 0.15s ease;
}

#datatable td button,
#datatable td a {
    border: none;
    margin-bottom: 2px;
}

.btn:hover {
    transform: translateY(-1px);
}

/* Primary button custom */
.btn-create,
.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-create:hover,
.btn-primary:hover {
    background: var(--black);
    color: var(--white);
}

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

/* Card surface */
.surface {
    background: var(--surface-bg);
    border-radius: var(--surface-radius);
    overflow: hidden;
    padding: 16px;
    box-shadow: var(--surface-shadow);
}

/* Table */
.data-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: 0.9rem;
}

/* Header */
.data-table thead th {
    background: var(--table-header-bg);
    padding: 16px 18px;
    font-weight: 600;
    color: var(--table-header-text);
    border-bottom: 1px solid var(--table-header-border);
}

/* Vertical separators (subtle, modern) */
.data-table thead th+th,
.data-table tbody td+td {
    border-left: 1px solid var(--table-separator);
}

/* Body */
.data-table tbody td {
    padding: var(--cell-padding-y) var(--cell-padding-x);
    border-bottom: 1px solid var(--table-separator);
    color: var(--primary-color);
}

/* Row hover */
.data-table tbody tr {
    transition: background 0.12s ease;
}

.data-table tbody tr:hover {
    background: var(--table-row-hover-bg);
}

.surface .dt-length label {
    margin-left: 8px;
}

/* Action buttons */
.data-table .btn {
    font-size: 0.75rem;
    padding: 0.25rem 0.55rem;
    border-radius: 6px;
}

/* Image Preview Styles */
.image-preview-container {
    margin-top: 8px;
}

.preview-wrapper {
    max-width: 200px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 8px var(--preview-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.preview-wrapper:hover {
    transform: scale(1.02);
    box-shadow: 0 6px 12px var(--preview-shadow-hover);
}

.preview-image {
    width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: cover;
    display: block;
}

.preview-remove-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.8;
    transition: opacity 0.2s ease;
}

.preview-remove-btn:hover {
    opacity: 1;
}

.current-image-preview {
    max-width: 200px;
}

.current-image-preview img {
    width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 8px var(--preview-shadow);
}

/* User Avatar Styles */
.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--avatar-border);
}

/* Header Background */
.header-bg {
    background: var(--primary-color);
}

/* Table Header Background (rarely used, kept for compatibility) */
.table-header-bg {
    background-color: var(--table-header-bg-alt) !important;
}

/* Primary Button Custom (color scheme for modal forms) */
.btn-primary-custom {
    background-color: var(--primary-custom);
    border-color: var(--primary-custom);
    color: var(--white);
    transition: all 0.2s ease;
}

.btn-primary-custom:hover {
    background-color: var(--primary-custom-hover);
    border-color: var(--primary-custom-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--primary-custom-hover-shadow);
}