/**
 * ============================================
 * HYBRID ADMIN LAYOUT STYLES
 * ============================================
 * A modern admin layout with:
 * - Fixed top navigation bar
 * - Collapsible sidebar for admin users
 * - Clean, professional design
 * - Full responsive support
 * Compatible with Bootstrap 5
 * ============================================
 */

/* ================= CSS CUSTOM PROPERTIES ================= */
:root {
    /* Primary Colors - TCM Teal */
    --nav-primary:var(--brand-primary);
    --nav-primary-dark: var(--brand-primary-dark);
    --nav-primary-light: var(--brand-primary-light);

    --bg-navbar-glass: rgba(244, 248, 248, 0.96);

    /* Sidebar Colors - TCM Dark Teal */
    --sidebar-bg: var(--bg-body);
    --sidebar-bg-dark: #0c1a1a;
    --sidebar-text: var(--brand-primary-light);
    --sidebar-text-active: #ffffff;
    --sidebar-accent: var(--brand-secondary-dark);
    --sidebar-hover: rgba(255, 255, 255, 0.08);
    --sidebar-active: rgba(17, 127, 126, 0.15);

    /* Accent Colors - Brand Gold */
    --nav-accent: var(--brand-gold-dark);
    --nav-accent-hover: var(--brand-gold);

    /* Neutral Colors - Teal-tinted grays */
    --nav-white: #ffffff;
    --nav-light: #f4f8f8;
    --nav-gray-100: #f0f5f5;
    --nav-gray-200: #e2eaea;
    --nav-gray-300: #c8d8d8;
    --nav-gray-500: #6b8080;
    --nav-gray-700: #3d5252;
    --nav-gray-900: #1a2d2d;

    /* Layout Dimensions */
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --top-header-height: 60px;

    /* Shadow Variables */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Animation Timing */
    --transition-fast: 150ms;
    --transition-normal: 250ms;
    --transition-slow: 350ms;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
}

/* ================= TOP HEADER ================= */
.top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--top-header-height);
    z-index: 1030;
}

.top-header .navbar {
    height: 100%;
    padding: 0 1rem;
    background: linear-gradient(135deg, var(--nav-primary) 0%, var(--nav-primary-dark) 100%) !important;
    box-shadow: var(--shadow-md);
}

/* ================= SIDEBAR TOGGLE BUTTON ================= */
.sidebar-toggle-btn {
    width: 40px;
    height: 40px;
    padding: 0;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    color: var(--nav-white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal) ease;
    margin-right: 1rem;
    position: relative;
    z-index: 1040;
}

.sidebar-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.sidebar-toggle-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(203, 163, 41, 0.4);
}

.sidebar-toggle-btn i {
    font-size: 1.2rem;
    transition: transform var(--transition-normal) ease;
}

/* ================= BRAND ================= */
.top-header .navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.top-header .navbar-brand img {
    height: 32px;
    width: auto;
}

.top-header .brand-text {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--nav-white);
    letter-spacing: -0.02em;
}

/* ================= TOP NAV LINKS ================= */
.top-header .navbar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 12px;
    color: rgba(255, 255, 255, 0.9) !important;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal) ease;
}

.top-header .navbar-nav .nav-link:hover,
.top-header .navbar-nav .nav-link:focus {
    color: var(--nav-accent) !important;
    background: rgba(255, 255, 255, 0.1);
}

/* ================= USER DROPDOWN ================= */
.user-dropdown {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-avatar i {
    font-size: 1.4rem;
}

.user-name {
    font-weight: 600;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.top-header .dropdown-menu {
    min-width: 180px;
    padding: 8px 0;
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.top-header .dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 0.9rem;
    color: var(--nav-gray-700);
}

.top-header .dropdown-item:hover,
.top-header .dropdown-item:focus {
    background: var(--nav-gray-100);
    color: var(--nav-primary);
}

.top-header .dropdown-item i {
    width: 16px;
    color: var(--nav-primary);
}

.dropdown-menu-end {
    right: 0;
    left: auto;
}

/* ================= MOBILE TOGGLE ================= */
.custom-toggler {
    width: 40px;
    height: 40px;
    padding: 8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    background: transparent;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 4px;
}

.toggler-icon-bar {
    display: block;
    width: 20px;
    height: 3px;
    background: #ffffff !important;
    border-radius: 2px;
    transition: all var(--transition-normal) ease;
    opacity: 1;
}

.custom-toggler[aria-expanded="true"] .toggler-icon-bar:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

.custom-toggler[aria-expanded="true"] .toggler-icon-bar:nth-child(2) {
    opacity: 0;
}

.custom-toggler[aria-expanded="true"] .toggler-icon-bar:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

/* ================= ADMIN SIDEBAR ================= */
.admin-sidebar {
    position: fixed;
    top: var(--top-header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--top-header-height));
    background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary-dark),var(--brand-primary-dark), var(--brand-primary), var(--brand-gold));
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-color: rgba(203, 163, 41, 0.85) rgba(255, 255, 255, 0.08);
    scrollbar-width: thin;
    z-index: 1020;
    transition: all var(--transition-normal) ease;
    display: flex;
    flex-direction: column;
}

/* Sidebar Collapsed State */
.admin-sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
}

.admin-sidebar.collapsed .sidebar-brand span,
.admin-sidebar.collapsed .sidebar-link span,
.admin-sidebar.collapsed .sidebar-section-title,
.admin-sidebar.collapsed .sidebar-submenu,
.admin-sidebar.collapsed .sidebar-footer-content,
.admin-sidebar.collapsed .expand-icon {
    opacity: 0;
    visibility: hidden;
    width: 0;
}

.admin-sidebar.collapsed .sidebar-link,
.admin-sidebar.collapsed .sidebar-expandable {
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}

.admin-sidebar.collapsed .sidebar-link i:first-child,
.admin-sidebar.collapsed .sidebar-expandable i:first-child {
    margin-right: 0;
}

/* ================= SIDEBAR HEADER ================= */
.sidebar-header {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(var(--sidebar-header-border-rgb), 0.08);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--primary);
    font-weight: 700;
    font-size: 1rem;
    white-space: nowrap;
}

.sidebar-brand i {
    font-size: 1.2rem;
    color: var(--nav-accent);
}

.sidebar-close {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--sidebar-text);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast) ease;
}

.sidebar-close:hover {
    background: var(--sidebar-hover);
    color: var(--sidebar-text-active);
}

/* ================= SIDEBAR NAVIGATION ================= */
.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.sidebar-section {
    margin-bottom: 0.5rem;
}

.sidebar-section-title {
    padding: 0.75rem 1.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--sidebar-text);
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0.75rem 1.25rem;
    color: var(--sidebar-link-color);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast) ease;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    white-space: nowrap;
}

.sidebar-link:hover,
.sidebar-link:focus {
    background: var(--sidebar-link-hover-bg);
    color: var(--sidebar-link-hover-color);
}

.sidebar-link.active {
    background: var(--sidebar-link-active-bg);
    color: var(--sidebar-link-active-color);
    border-right: 3px solid var(--sidebar-accent);
}

.sidebar-link i {
    width: 20px;
    font-size: 1rem;
    text-align: center;
    flex-shrink: 0;
}

/* ================= EXPANDABLE MENU ================= */
.sidebar-expandable {
    position: relative;
}

.expand-icon {
    margin-left: auto;
    font-size: 0.75rem;
    transition: transform var(--transition-fast) ease;
}

.sidebar-expandable[aria-expanded="true"] .expand-icon {
    transform: rotate(180deg);
}

/* ================= SUBMENU ================= */
.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal) ease;
    background: rgba(0, 0, 0, 0.15);
}

.sidebar-submenu.open {
    max-height: 500px;
}

.sidebar-sublink {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.6rem 1.25rem 0.6rem 3.25rem;
    color: var(--sidebar-text);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all var(--transition-fast) ease;
}

.sidebar-sublink:hover,
.sidebar-sublink:focus {
    color: var(--sidebar-text-active);
    background: rgba(255, 255, 255, 0.03);
}

.sidebar-sublink i {
    width: 16px;
    font-size: 0.85rem;
    text-align: center;
}

/* ================= SIDEBAR FOOTER ================= */
.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid rgba(var(--sidebar-header-border-rgb), 0.08);
    margin-top: auto;
}

.sidebar-footer-content {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--sidebar-link-color);
    font-size: 0.8rem;
    white-space: nowrap;
    overflow: hidden;
}

.sidebar-footer-content i {
    color: var(--nav-accent);
}

/* ================= SIDEBAR OVERLAY (MOBILE) ================= */
.sidebar-overlay {
    position: fixed;
    top: var(--top-header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    z-index: 1015;
    transition: all var(--transition-normal) ease;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ================= BODY LAYOUT ================= */
html,
body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

body.has-sidebar {
    display: flex;
    flex-direction: column;
}

/* ================= MAIN CONTENT ================= */
.main-content {
    padding-top: var(--top-header-height);
    flex: 1 0 auto;
    min-height: calc(100vh - var(--top-header-height));
    transition: margin-left var(--transition-normal) ease;
    display: flex;
    flex-direction: column;
}

.main-content>.container,
.main-content>.container-fluid {
    flex: 1 0 auto;
}

body.has-sidebar .main-content {
    margin-left: var(--sidebar-width);
}

body.has-sidebar.sidebar-collapsed .main-content {
    margin-left: var(--sidebar-collapsed-width);
}

/* ================= FOOTER ================= */
body.has-sidebar .site-footer {
    margin-left: var(--sidebar-width);
}

body.has-sidebar.sidebar-collapsed .site-footer {
    margin-left: var(--sidebar-collapsed-width);
}

.footer-link {
    color: var(--footer-text);
    text-decoration: none;
    transition: color var(--transition-fast) ease;
}

.footer-link:hover,
.footer-link:focus {
    color: var(--nav-accent);
}

/* ================= RESPONSIVE ================= */
@media (max-width: 991.98px) {

    /* Mobile: Sidebar as overlay */
    .admin-sidebar {
        transform: translateX(-100%);
        width: var(--sidebar-width) !important;
    }

    .admin-sidebar.show {
        transform: translateX(0);
    }

    .main-content,
    .site-footer {
        margin-left: 0 !important;
    }

    body.has-sidebar .main-content,
    body.has-sidebar.sidebar-collapsed .main-content {
        margin-left: 0 !important;
    }

    body.has-sidebar .site-footer,
    body.has-sidebar.sidebar-collapsed .site-footer {
        margin-left: 0 !important;
    }

    /* Mobile navbar collapse */
    .top-header .navbar-collapse {
        position: fixed;
        top: var(--top-header-height);
        right: 0;
        width: 280px;
        height: calc(100vh - var(--top-header-height));
        background: var(--nav-primary-dark);
        padding: 1rem;
        transform: translateX(100%);
        transition: transform var(--transition-normal) ease;
        overflow-y: auto;
    }

    .top-header .navbar-collapse.show {
        transform: translateX(0);
    }

    body.has-sidebar .top-header .navbar {
        padding: 0 0.625rem;
    }

    body.has-sidebar .top-header .navbar-brand {
        flex: 1 1 auto;
        min-width: 0;
        margin-right: 0.5rem;
    }

    body.has-sidebar .top-header .brand-text {
        display: inline-block !important;
        max-width: clamp(7.5rem, 38vw, 12rem);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: 0.95rem;
    }

    .top-header .navbar-nav .nav-link {
        padding: 1rem;
        border-radius: var(--radius-sm);
        margin-bottom: 0.25rem;
    }

    .site-header .navbar {
        position: relative;
        z-index: 1035;
    }

    .site-header .navbar-collapse {
        position: absolute !important;
        top: calc(100% + 1px) !important;
        left: 0 !important;
        right: 0 !important;
        width: auto !important;
        max-width: none !important;
        height: auto !important;
        max-height: calc(100vh - 72px);
        padding: 1rem !important;
        background: linear-gradient(180deg, var(--nav-primary-dark), var(--nav-primary));
        box-shadow: var(--shadow-xl);
        transform: none !important;
        overflow-y: auto;
        z-index: 1025;
    }

    .site-header .navbar-collapse.show {
        transform: none !important;
    }

    .top-header .custom-toggler {
        position: relative;
        z-index: 1040;
        flex: 0 0 auto;
    }

    body.has-sidebar .top-header .admin-menu-toggler {
        display: inline-flex;
        flex-direction: row;
        width: 40px;
        min-width: 40px;
    }

    .top-header .sidebar-toggle-btn {
        position: relative;
        z-index: 1041;
        flex: 0 0 auto;
        margin-right: 0.625rem;
    }
}

@media (min-width: 992px) {

    /* Hide sidebar close button on desktop */
    .sidebar-close {
        display: none;
    }

    /* Hide sidebar toggle button when no sidebar */
    body:not(.has-sidebar) .sidebar-toggle-btn {
        display: none;
    }
}

/* ================= SCROLLBAR STYLING ================= */
.admin-sidebar::-webkit-scrollbar {
    width: 10px;
}

.admin-sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    margin: 12px 0;
}

.admin-sidebar::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(203, 163, 41, 0.95), rgba(17, 127, 126, 0.85));
    border: 2px solid rgba(18, 40, 40, 0.65);
    border-radius: 999px;
    min-height: 44px;
}

.admin-sidebar::-webkit-scrollbar-thumb:hover,
.admin-sidebar::-webkit-scrollbar-thumb:active {
    background: linear-gradient(180deg, #d9b84b, #2bb5b4);
    border-color: rgba(255, 255, 255, 0.28);
}

/* ================= KEYBOARD ACCESSIBILITY ================= */
.sidebar-link:focus-visible,
.sidebar-sublink:focus-visible,
.sidebar-toggle-btn:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: -2px;
}

/* ================= LAYOUT SWITCHER ================= */
.layout-switcher {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 1rem;
}

.layout-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    background: transparent;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast) ease;
}

.layout-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--nav-white);
}

.layout-btn.active {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--nav-accent);
    color: var(--nav-accent);
}

.layout-btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(203, 163, 41, 0.3);
}

.layout-btn i {
    font-size: 0.9rem;
}

/* Classic layout switcher adjustments */
.site-header .layout-switcher {
    margin-right: auto;
    margin-left: 1rem;
    order: 1;
}

@media (max-width: 991.98px) {
    .layout-switcher {
        display: none !important;
    }
}

/* ================= REDUCED MOTION ================= */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================= PRINT STYLES ================= */
@media print {

    .admin-sidebar,
    .sidebar-toggle-btn,
    .sidebar-overlay {
        display: none !important;
    }

    .main-content,
    .site-footer {
        margin-left: 0 !important;
    }

    .top-header {
        position: static !important;
    }

    .main-content {
        padding-top: 0 !important;
    }
}