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

:root {
    --bg-primary: #080c14;
    --bg-secondary: rgba(15, 22, 42, 0.65);
    --bg-sidebar: rgba(10, 15, 30, 0.85);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-focus: rgba(99, 102, 241, 0.4);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-primary: #6366f1; /* Indigo */
    --color-primary-hover: #4f46e5;
    --color-secondary: #8b5cf6; /* Violet */
    --color-success: #10b981; /* Emerald */
    --color-warning: #f59e0b; /* Amber */
    --color-danger: #ef4444; /* Red */
    
    --grad-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --grad-success: linear-gradient(135deg, #059669 0%, #10b981 100%);
    --grad-danger: linear-gradient(135deg, #dc2626 0%, #f43f5e 100%);
    --grad-dark: linear-gradient(180deg, #0f172a 0%, #020617 100%);
    
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --glass-blur: blur(12px);
    
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(139, 92, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* App Layout */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
    position: relative;
    text-decoration: none;
}

/* Sidebar Styling */
.sidebar {
    width: 280px;
    background: var(--bg-sidebar);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    transition: var(--transition-smooth);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 3rem;
    padding-left: 0.5rem;
}

.sidebar-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.4);
}

.sidebar-logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(to right, #fff, #a5b4fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none !important;
}

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

.sidebar-item a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 12px;
    font-weight: 500;
    transition: var(--transition-fast);
}

.sidebar-item a:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.sidebar-item.active a {
    color: #fff;
    background: var(--grad-primary);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.25);
}

.sidebar-item.active a i {
    color: #fff;
}

.sidebar-item i {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.sidebar-item a:hover i {
    color: var(--color-primary);
}

/* Main Content Area */
.main-content {
    margin-left: 280px;
    flex-grow: 1;
    min-height: 100vh;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    width: calc(100% - 280px);
}

/* Header & Top Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.page-title h1 {
    font-size: 1.85rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.25rem;
}

.page-title p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-secondary);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
}

/* Cards & Containers */
.card {
    background: var(--bg-secondary);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.75rem;
    box-shadow: var(--card-shadow);
    transition: var(--transition-fast);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Dashboard Statistics Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
}

.stat-icon.primary { color: var(--color-primary); background: rgba(99, 102, 241, 0.1); border-color: rgba(99, 102, 241, 0.2); }
.stat-icon.secondary { color: var(--color-secondary); background: rgba(139, 92, 246, 0.1); border-color: rgba(139, 92, 246, 0.2); }
.stat-icon.success { color: var(--color-success); background: rgba(16, 185, 129, 0.1); border-color: rgba(16, 185, 129, 0.2); }
.stat-icon.warning { color: var(--color-warning); background: rgba(245, 158, 11, 0.1); border-color: rgba(245, 158, 11, 0.2); }

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

.stat-val {
    font-size: 1.85rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 0.15rem;
}

.stat-lbl {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--grad-primary);
    color: #fff;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
}

.btn-success {
    background: var(--grad-success);
    color: #fff;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
}

.btn-danger {
    background: var(--grad-danger);
    color: #fff;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
}

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

/* Tables styling */
.table-container {
    overflow-x: auto;
    width: 100%;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.data-table th {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 1.15rem 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    color: var(--text-primary);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: var(--transition-fast);
}

.data-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.015);
}

.badge {
    display: inline-flex;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.badge-success { background: rgba(16, 185, 129, 0.1); color: var(--color-success); border: 1px solid rgba(16, 185, 129, 0.2); }
.badge-warning { background: rgba(245, 158, 11, 0.1); color: var(--color-warning); border: 1px solid rgba(245, 158, 11, 0.2); }
.badge-danger { background: rgba(239, 68, 68, 0.1); color: var(--color-danger); border: 1px solid rgba(239, 68, 68, 0.2); }
.badge-info { background: rgba(99, 102, 241, 0.1); color: var(--color-primary); border: 1px solid rgba(99, 102, 241, 0.2); }

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.75rem 1rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition-fast);
    width: 100%;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px var(--border-focus);
}

select.form-control {
    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' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 100px;
}

/* Alert Banner */
.alert {
    padding: 1rem 1.25rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.95rem;
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.alert-info {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* Action icons */
.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
}

.action-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

.action-btn.edit:hover {
    color: var(--color-primary);
    border-color: rgba(99, 102, 241, 0.3);
}

.action-btn.delete:hover {
    color: var(--color-danger);
    border-color: rgba(239, 68, 68, 0.3);
}

/* Attendance list specific */
.attendance-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}

.attendance-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
}

.attendance-options {
    display: flex;
    gap: 0.5rem;
}

.attendance-radio {
    display: none;
}

.attendance-label {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    cursor: pointer;
    font-weight: 700;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    color: var(--text-secondary);
}

.attendance-radio:checked + .attendance-label.present {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
    border-color: var(--color-success);
}

.attendance-radio:checked + .attendance-label.late {
    background: rgba(245, 158, 11, 0.2);
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.attendance-radio:checked + .attendance-label.absent {
    background: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
    border-color: var(--color-danger);
}

/* Birthday slider / lists */
.bday-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.bday-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem;
    border-radius: 16px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0%, rgba(99, 102, 241, 0.02) 100%);
    border: 1px solid var(--border-color);
}

.bday-user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.bday-badge-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.15);
    color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Mobile Sidebar Menu Button */
.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
    padding: 0.5rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 1.5rem;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
}

@media (max-width: 640px) {
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .user-profile {
        align-self: flex-start;
        width: 100%;
        justify-content: flex-start;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-card {
        padding: 1.25rem !important;
        margin: 4vh auto !important;
        width: 95% !important;
    }
    
    .modal-form-grid {
        grid-template-columns: 1fr !important;
    }
}

/* General Responsive Data Table -> Block Card Layout */
@media (max-width: 768px) {
    .data-table, 
    .data-table tbody, 
    .data-table tr, 
    .data-table td, 
    .data-table th { 
        display: block !important; 
        width: 100% !important;
    }
    
    .data-table thead tr { 
        position: absolute;
        top: -9999px;
        left: -9999px;
    }
    
    .data-table tr { 
        border: 1px solid var(--border-color);
        border-radius: 16px;
        background: rgba(255, 255, 255, 0.01);
        margin-bottom: 1.25rem;
        padding: 1.25rem;
    }
    
    .data-table td { 
        border: none !important;
        border-bottom: 1px solid rgba(255, 255, 255, 0.03) !important; 
        position: relative;
        padding: 0.65rem 0 !important;
        text-align: left !important;
    }
    
    .data-table td:last-child {
        border-bottom: 0 !important;
        padding-bottom: 0 !important;
    }
    
    .data-table td[data-label]::before { 
        content: attr(data-label);
        display: block;
        font-size: 0.72rem;
        text-transform: uppercase;
        color: var(--text-secondary);
        margin-bottom: 0.35rem;
        font-weight: 700;
        letter-spacing: 0.03em;
    }
    
    /* Reset alignments */
    .data-table td[style*="text-align: right"],
    .data-table td[style*="text-align: center"] {
        text-align: left !important;
    }
    
    .quick-options,
    .attendance-options {
        justify-content: flex-start !important;
    }
}

/* Reports view responsive stack */
@media (max-width: 900px) {
    .reports-grid {
        grid-template-columns: 1fr !important;
    }
}

/* DB Manager Stacking layout */
.db-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    align-items: start;
}
.db-grid-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
@media (min-width: 769px) {
    .db-grid-section.has-border {
        border-right: 1px solid var(--border-color);
        padding-right: 1.5rem;
    }
}
@media (max-width: 768px) {
    .db-grid-section.has-border {
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 1.5rem;
        border-right: none;
        padding-right: 0;
    }
}

.download-btn-log {
    position: absolute;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
}
@media (max-width: 640px) {
    .download-btn-log {
        position: static;
        transform: none;
        margin-top: 1rem;
        width: 100%;
    }
    .stat-card {
        flex-wrap: wrap;
    }
}