/* 
   SchoolManager Premium Design System v2
   Refined Slate & Azure Palette
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --sm-bg: #FAFAF9;
    --sm-primary: #0F52BA;
    /* Sapphire Blue */
    --sm-primary-dark: #083D94;
    --sm-secondary: #1C1917;
    /* Dark Slate */
    --sm-accent: #CA8A04;
    /* Premium Gold */
    --sm-text-muted: #78716C;
    --sm-glass: rgba(255, 255, 255, 0.75);
    --sm-glass-border: rgba(255, 255, 255, 0.6);
    --sm-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.04);
    --sm-shadow-lg: 0 12px 48px 0 rgba(31, 38, 135, 0.08);
    --sm-font: 'Inter', sans-serif;

    /* Admin Specific Accents */
    --adm-blue: #0ea5e9;
    --adm-green: #10b981;
    --adm-orange: #f59e0b;
    --adm-red: #ef4444;
}

body {
    font-family: var(--sm-font);
    background-color: var(--sm-bg);
    color: var(--sm-secondary);
    -webkit-font-smoothing: antialiased;
}

/* --- SIDEBAR PREMIUM BRANDED BLUE THEME --- */
ul#accordionSidebar.sidebar-glass {
    background: linear-gradient(180deg, #0f52ba 0%, #083d94 100%) !important;
    border-right: none;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
    overflow-x: hidden !important;
    z-index: 1050;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Fix Logo Scaling & Visibility */
ul#accordionSidebar.sidebar-glass .sidebar-brand {
    height: auto !important;
    padding: 2.25rem 1.75rem !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: transparent;
}

ul#accordionSidebar.sidebar-glass .sidebar-brand-icon {
    width: 100%;
    text-align: center;
}

ul#accordionSidebar.sidebar-glass .sidebar-brand-icon img {
    max-height: 75px !important;
    width: auto !important;
    max-width: 100%;
    filter: brightness(1.1) drop-shadow(0 4px 12px rgba(255, 255, 255, 0.2));
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

ul#accordionSidebar.sidebar-glass:not(.toggled) .sidebar-brand:hover .sidebar-brand-icon img {
    transform: scale(1.04);
}

/* Sidebar Section Headings — Soft White Sapphire */
ul#accordionSidebar.sidebar-glass .sidebar-heading {
    text-transform: uppercase;
    font-size: 0.75rem !important;
    font-weight: 700 !important;
    color: rgba(255, 255, 255, 0.6) !important;
    letter-spacing: 0.15em;
    padding: 2.25rem 1.75rem 0.85rem !important;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 0.25rem;
}

/* Nav Links — Branded White */
ul#accordionSidebar.sidebar-glass .nav-item .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    font-weight: 500;
    font-size: 0.92rem;
    padding: 0.85rem 1.5rem !important;
    margin: 4px 12px;
    border-radius: 12px;
    transition: all 0.25s ease;
    width: auto !important;
    display: flex;
    align-items: center;
    gap: 0.85rem;
}

ul#accordionSidebar.sidebar-glass .nav-item .nav-link i {
    color: rgba(255, 255, 255, 0.7) !important;
    font-size: 1.15rem;
    width: 1.5rem;
    flex-shrink: 0;
    text-align: center;
    transition: all 0.2s ease;
}

/* Parent with open submenu */
ul#accordionSidebar.sidebar-glass .nav-item .nav-link:not(.collapsed)[data-bs-toggle="collapse"] {
    color: #ffffff !important;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.12) !important;
}

ul#accordionSidebar.sidebar-glass .nav-item .nav-link:not(.collapsed)[data-bs-toggle="collapse"] i {
    color: #ffffff !important;
    opacity: 1;
}

/* Hover state */
ul#accordionSidebar.sidebar-glass .nav-item .nav-link:hover {
    background: rgba(255, 255, 255, 0.15) !important;
    color: #ffffff !important;
}

ul#accordionSidebar.sidebar-glass .nav-item .nav-link:hover i {
    color: #ffffff !important;
    transform: translateX(3px);
    opacity: 1;
}

/* Active state — Premium White Highlight */
ul#accordionSidebar.sidebar-glass .nav-item.active .nav-link {
    background: #ffffff !important;
    color: #0f52ba !important;
    /* Theme Primary Blue */
    font-weight: 700;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

ul#accordionSidebar.sidebar-glass .nav-item.active .nav-link i {
    color: #0f52ba !important;
    opacity: 1;
}

/* Collapse inner (submenu dropdown) */
ul#accordionSidebar.sidebar-glass .collapse-inner {
    background: rgba(0, 0, 0, 0.15) !important;
    border-radius: 12px;
    padding: 8px !important;
    margin: 4px 12px 10px 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Child Menu Items */
ul#accordionSidebar.sidebar-glass .collapse-inner .collapse-item {
    color: rgba(255, 255, 255, 0.75) !important;
    font-weight: 500;
    font-size: 0.88rem;
    border-radius: 8px;
    padding: 0.65rem 1.25rem !important;
    transition: all 0.2s ease;
    display: block;
    margin-bottom: 3px;
}

ul#accordionSidebar.sidebar-glass .collapse-inner .collapse-item:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: #ffffff !important;
    padding-left: 1.5rem !important;
}

ul#accordionSidebar.sidebar-glass .collapse-inner .collapse-item.text-primary,
ul#accordionSidebar.sidebar-glass .collapse-inner .collapse-item.active {
    background: rgba(255, 255, 255, 0.2) !important;
    color: #ffffff !important;
    font-weight: 700;
}

/* Home link (Trang chủ) */
ul#accordionSidebar.sidebar-glass>.nav-item:first-of-type .nav-link {
    margin-top: 1.25rem;
}

/* Admin-only Hangfire button at bottom */
ul#accordionSidebar.sidebar-glass .mt-auto .btn-primary {
    background: #ffffff !important;
    color: #0f52ba !important;
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    font-size: 0.88rem;
    font-weight: 700;
    padding: 0.75rem !important;
}

/* Scrollbar styling for dark sidebar */
.sidebar-glass::-webkit-scrollbar {
    width: 4px;
}

.sidebar-glass::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-glass::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
}

/* --- MODERN PORTAL COMPONENTS --- */
.glass-card {
    background: var(--sm-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--sm-glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--sm-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--sm-shadow-lg);
    border-color: rgba(255, 255, 255, 0.8);
}

.spotlight-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.4) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-left: 6px solid var(--sm-primary) !important;
    border-radius: 24px;
    overflow: hidden;
}

.dash-stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.25rem;
}

.stat-item {
    padding: 1.5rem;
    border-radius: 20px;
    background: var(--sm-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: var(--sm-shadow);
    text-align: center;
    border: 1px solid var(--sm-glass-border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--sm-shadow-lg);
}

.stat-item i {
    display: block;
    font-size: 2rem;
    color: var(--sm-primary);
    margin-bottom: 0.75rem;
}

/* --- ADMIN DASHBOARD V3 --- */
.admin-metric-card {
    background: var(--sm-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--sm-glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--sm-shadow);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    border-bottom: 4px solid transparent;
}

.admin-metric-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--sm-shadow-lg);
}

.admin-metric-card.accent-blue {
    border-color: var(--adm-blue);
}

.admin-metric-card.accent-green {
    border-color: var(--adm-green);
}

.admin-metric-card.accent-orange {
    border-color: var(--adm-orange);
}

.admin-metric-card.accent-red {
    border-color: var(--adm-red);
}

.admin-metric-card .icon-label {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.bg-blue-subtle {
    background: #e0f2fe;
    color: var(--adm-blue);
}

.bg-green-subtle {
    background: #dcfce7;
    color: var(--adm-green);
}

.bg-orange-subtle {
    background: #fef3c7;
    color: var(--adm-orange);
}

.bg-red-subtle {
    background: #fee2e2;
    color: var(--adm-red);
}

.admin-table-modern {
    border-collapse: separate;
    border-spacing: 0 8px;
}

.admin-table-modern thead th {
    background: transparent;
    border: none;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--sm-text-muted);
    padding: 1rem;
}

.admin-table-modern tbody tr {
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.02);
    transition: all 0.2s ease;
}

.admin-table-modern tbody tr:hover {
    transform: scale(1.005);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.admin-table-modern tbody td {
    border: none;
    padding: 1.25rem 1rem;
    vertical-align: middle;
}

.admin-table-modern tbody td:first-child {
    border-radius: 12px 0 0 12px;
}

.admin-table-modern tbody td:last-child {
    border-radius: 0 12px 12px 0;
}

/* Topbar Premium — Enhanced for Branded Blue Sidebar */
.topbar-glass {
    background: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid rgba(0, 0, 0, 0.05) !important;
    border-bottom: 3px solid var(--sm-primary) !important;
    /* Branded Blue Anchor */
    margin: 1.25rem 1.5rem 1.75rem !important;
    border-radius: 16px !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
    position: relative;
    z-index: 1050;
    padding: 0.5rem 1rem !important;
}

.topbar .nav-link {
    color: var(--sm-secondary) !important;
    font-weight: 500;
}

.topbar .nav-link i {
    color: #475569 !important;
    /* Muted Slate 600 */
}

/* Enhanced Search Bar */
#globalMenuSearch {
    font-weight: 500;
    color: #1e293b !important;
}

#globalMenuSearch::placeholder {
    color: #94a3b8 !important;
}

/* Avatar Border Match */
.img-profile {
    border: 3px solid #f1f5f9;
    padding: 2px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.topbar-divider {
    border-right: 1px solid rgba(0, 0, 0, 0.06) !important;
    height: 1.5rem;
}

/* Immersive Hero */
.hero-portal {
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--sm-shadow-lg);
    margin-bottom: 3rem;
}

.hero-overlay {
    background: linear-gradient(to right, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.1));
    z-index: 2;
}

.hero-content {
    max-width: 600px;
    padding: 4rem;
}

/* Quick Access Grid */
.quick-hub-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem;
    background: var(--sm-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 20px;
    text-decoration: none !important;
    color: var(--sm-secondary);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--sm-glass-border);
    box-shadow: var(--sm-shadow);
}

.quick-hub-item i {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 16px;
    background: #f0f9ff;
    color: var(--sm-primary);
    transition: all 0.3s ease;
}

.quick-hub-item:hover i {
    background: var(--sm-primary);
    color: white;
    transform: scale(1.1);
}

.quick-hub-item span {
    font-weight: 700;
    font-size: 1rem;
}

/* News Feed Modern */
.news-tag {
    background: var(--sm-primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

/* Section Titles */
.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    font-weight: 800;
    font-size: 1.75rem;
    color: var(--sm-secondary);
}

/* Mobile Tweak */
@media (max-width: 991px) {
    .sidebar-brand-icon img {
        max-height: 60px !important;
    }
}