@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

/* --- Core Design System Variables --- */
:root {
    --bg-dark: #070b19;
    --bg-gradient: radial-gradient(circle at 50% 50%, #0f172a 0%, #070b19 100%);
    
    /* Glassmorphism Core */
    --glass-bg: rgba(15, 23, 42, 0.45);
    --glass-bg-hover: rgba(30, 41, 59, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-border-focus: rgba(124, 58, 237, 0.5);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-shadow-glow: 0 0 20px rgba(124, 58, 237, 0.15);
    
    /* Vibrant Accent Colors */
    --primary: #7c3aed; /* Deep Violet */
    --primary-gradient: linear-gradient(135deg, #7c3aed 0%, #db2777 100%);
    --secondary: #06b6d4; /* Royal Cyan */
    --secondary-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    
    /* Text states */
    --text-primary: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #0f172a;
    
    /* Status indicators */
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.15);
    --success-border: rgba(16, 185, 129, 0.3);
    
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.15);
    --danger-border: rgba(239, 68, 68, 0.3);
    
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);
    --warning-border: rgba(245, 158, 11, 0.3);
}

/* --- Base Resets & Typography --- */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* --- Layout Structures --- */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* Elegant Sidebar Navigation */
.sidebar {
    width: 280px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid var(--glass-border);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: fixed;
    height: 100vh;
    z-index: 100;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.brand-section {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.brand-logo {
    font-size: 1.8rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.brand-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    display: block;
    margin-top: -2px;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    list-style: none;
}

.nav-item {
    width: 100%;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1.2rem;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.25s ease;
    border: 1px solid transparent;
}

.nav-link i {
    font-size: 1.15rem;
    transition: transform 0.25s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link:hover i {
    transform: translateX(4px);
}

.nav-link.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-link.active i {
    color: white;
}

/* User Card in Sidebar */
.user-profile-widget {
    margin-top: auto;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    border: 2px solid var(--glass-border);
    font-size: 1.1rem;
}

.user-info {
    display: flex;
    flex-direction: column;
}

.user-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.user-role {
    font-size: 0.75rem;
    color: var(--secondary);
    font-weight: 600;
    text-transform: uppercase;
}

/* Main Content Area */
.content-viewport {
    flex: 1;
    margin-left: 280px;
    padding: 2.5rem;
    min-height: 100vh;
    transition: all 0.3s ease;
}

/* --- Header Section --- */
.content-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2.5rem;
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1.25rem 2rem;
    border-radius: 16px;
}

.page-title {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.gregorian-date {
    font-size: 0.9rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* --- Glassmorphic Containers (Cards) --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--glass-shadow);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--glass-shadow), var(--glass-shadow-glow);
    border-color: rgba(255,255,255,0.12);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* --- Interactive Metrics Dashboard Widgets --- */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.metric-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.3s ease;
}

.metric-card:hover {
    transform: scale(1.03);
    border-color: var(--secondary);
}

.metric-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
}

.metric-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

.metric-icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--secondary);
    border: 1px solid var(--glass-border);
}

.metric-card:nth-child(2n) .metric-icon-box {
    color: var(--primary);
}

/* --- Beautiful Form Elements --- */
.form-group {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.form-control, .form-select {
    width: 100%;
    padding: 0.85rem 1.2rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    outline: none;
    transition: all 0.25s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(124, 58, 237, 0.3);
    background: rgba(30, 41, 59, 0.7);
}

/* Custom dropdown arrow styling */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-select option {
    background: var(--bg-dark);
    color: var(--text-primary);
}

/* Switch & Checkbox styling */
.form-check {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
    margin-top: 0.5rem;
}

.form-check-input {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.6);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    transition: all 0.2s ease;
}

.form-check-input:checked {
    background: var(--primary-gradient);
    border-color: transparent;
}

.form-check-input:checked::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    color: white;
    font-size: 0.75rem;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* --- Premium Dynamic Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.85rem 1.8rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid transparent;
    font-family: inherit;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    box-shadow: 0 6px 20px rgba(124, 58, 237, 0.45);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--secondary-gradient);
    color: white;
    box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #22d3ee 0%, #60a5fa 100%);
    box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
    transform: translateY(-2px);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

/* Button Row */
.button-row {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

/* --- High-Quality GridView Table Styling --- */
.grid-container {
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid var(--glass-border);
    background: rgba(15, 23, 42, 0.3);
    margin-top: 1rem;
}

.custom-grid {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.custom-grid th {
    background: rgba(15, 23, 42, 0.8) !important;
    color: var(--secondary) !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    font-size: 0.8rem !important;
    letter-spacing: 1px !important;
    padding: 1.1rem 1.5rem !important;
    border-bottom: 2px solid var(--glass-border) !important;
}

.custom-grid td {
    padding: 1.1rem 1.5rem !important;
    border-bottom: 1px solid var(--glass-border) !important;
    color: var(--text-primary) !important;
    font-size: 0.95rem !important;
}

.custom-grid tr:last-child td {
    border-bottom: none !important;
}

.custom-grid tr {
    transition: background-color 0.2s ease !important;
}

.custom-grid tr:hover {
    background-color: rgba(255, 255, 255, 0.03) !important;
}

/* Pagination */
.custom-grid .pager-row td {
    padding: 0.5rem !important;
}

.custom-grid .pager-table {
    display: flex;
    justify-content: center;
    gap: 0.3rem;
}

.custom-grid .pager-table span {
    background: var(--primary-gradient) !important;
    color: white !important;
    border-radius: 8px !important;
    padding: 0.4rem 0.8rem !important;
    font-weight: bold !important;
    font-size: 0.85rem !important;
}

.custom-grid .pager-table a {
    background: rgba(255, 255, 255, 0.05) !important;
    color: var(--text-muted) !important;
    border: 1px solid var(--glass-border) !important;
    border-radius: 8px !important;
    padding: 0.4rem 0.8rem !important;
    text-decoration: none !important;
    font-size: 0.85rem !important;
    transition: all 0.25s ease !important;
}

.custom-grid .pager-table a:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: var(--text-primary) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
}

/* --- Elegant Alert/Status Toast Notification Systems --- */
.alert-box {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideDown 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.alert-success {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success);
}

.alert-danger {
    background: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
}

.alert-warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning);
}

/* --- KPI Dynamic Evaluation Layout --- */
.kpi-category-header {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--secondary);
    border-left: 4px solid var(--secondary);
    margin: 1.5rem 0 1rem 0;
}

.kpi-row-item {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 100px;
    gap: 1.5rem;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--glass-border);
    transition: background 0.2s ease;
}

.kpi-row-item:hover {
    background: rgba(255, 255, 255, 0.01);
}

.kpi-row-name {
    font-size: 0.95rem;
    font-weight: 500;
}

.kpi-row-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.kpi-score-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    text-align: center;
}

.badge-high {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.badge-mid {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.badge-low {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

/* --- Overlay Modals (Glass style) --- */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 11, 25, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 2rem;
}

.modal-box {
    background: #0f172a;
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    max-width: 750px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    padding: 2.5rem;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    position: relative;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: var(--text-primary);
}

/* --- Multi-Select Assignment Panel --- */
.selection-list-box {
    max-height: 250px;
    overflow-y: auto;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.5rem;
    background: rgba(15, 23, 42, 0.6);
}

.selection-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.selection-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

/* --- Custom Real-Time Progress Slider/Indicator --- */
.score-slider-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.score-slider {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    appearance: none;
    outline: none;
}

.score-slider::-webkit-slider-thumb {
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: transform 0.1s ease;
}

.score-slider::-webkit-slider-thumb:hover {
    transform: scale(1.25);
}

/* --- Keyframe Animations --- */
@keyframes slideDown {
    from { transform: translateY(-15px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes scaleUp {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* --- Responsive Layout Configurations --- */
@media (max-width: 1024px) {
    .sidebar {
        width: 80px;
        padding: 1.5rem 0.5rem;
    }
    
    .sidebar .brand-title,
    .sidebar .brand-sub,
    .sidebar .nav-text,
    .sidebar .user-info {
        display: none;
    }
    
    .brand-section {
        justify-content: center;
        padding-bottom: 1rem;
    }
    
    .nav-link {
        justify-content: center;
        padding: 0.85rem;
    }
    
    .user-profile-widget {
        justify-content: center;
        padding: 0.5rem;
        background: transparent;
        border: none;
    }
    
    .content-viewport {
        margin-left: 80px;
        padding: 1.5rem;
    }
}

@media (max-width: 640px) {
    .content-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
        padding: 1rem 1.5rem;
    }
    
    .content-viewport {
        padding: 1rem;
    }
    
    .metrics-row {
        grid-template-columns: 1fr;
    }
    
    .button-row {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .kpi-row-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding: 1rem 0.5rem;
    }
}

/* --- Global Loading & Message Modal System --- */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 11, 25, 0.75);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 99999;
    animation: fadeIn 0.25s ease-out;
}

.loading-spinner-box {
    background: rgba(15, 23, 42, 0.65);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), var(--glass-shadow-glow);
    max-width: 320px;
    width: 90%;
    text-align: center;
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.loading-spinner {
    font-size: 3.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 0 10px rgba(124, 58, 237, 0.4));
}

.loading-text {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

.loading-subtext {
    font-size: 0.85rem;
    color: var(--text-muted);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}