/* =====================================================
   LIMS - Laboratory Information Management System
   Main Stylesheet
   ===================================================== */

:root {
    /* Primary Palette - Medical Blue */
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #4a90d9;
    --primary-bg: rgba(26, 115, 232, 0.08);
    
    /* Accent */
    --accent: #00bcd4;
    --accent-dark: #0097a7;
    
    /* Semantic Colors */
    --success: #0f9d58;
    --warning: #f4b400;
    --danger: #ea4335;
    --info: #4285f4;
    
    /* Neutrals */
    --dark: #1a1a2e;
    --gray-900: #212529;
    --gray-800: #343a40;
    --gray-700: #495057;
    --gray-600: #6c757d;
    --gray-500: #adb5bd;
    --gray-400: #ced4da;
    --gray-300: #dee2e6;
    --gray-200: #e9ecef;
    --gray-100: #f1f3f5;
    --white: #ffffff;
    
    /* Layout */
    --sidebar-width: 260px;
    --sidebar-collapsed: 0px;
    --topbar-height: 64px;
    --border-radius: 10px;
    --border-radius-sm: 6px;
    --border-radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.15);
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =====================================================
   Base Styles
   ===================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #f0f2f5;
    color: var(--gray-800);
    font-size: 0.875rem;
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* =====================================================
   App Wrapper
   ===================================================== */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

/* =====================================================
   Sidebar
   ===================================================== */
.sidebar {
    width: var(--sidebar-width);
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1040;
    background: linear-gradient(180deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: var(--white);
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    overflow: hidden;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: var(--topbar-height);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand-icon {
    font-size: 1.5rem;
    color: var(--accent);
}

.brand-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.text-accent {
    color: var(--accent);
}

.sidebar-close {
    background: none;
    border: none;
    color: var(--gray-500);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 5px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(255,255,255,0.1) transparent;
}

.sidebar-nav::-webkit-scrollbar {
    width: 4px;
}

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

.sidebar-nav::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-section {
    padding: 16px 20px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255,255,255,0.35);
}

.nav-item .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    color: rgba(255,255,255,0.65);
    font-size: 0.85rem;
    font-weight: 400;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-item .nav-link i {
    width: 20px;
    text-align: center;
    font-size: 0.9rem;
}

.nav-item .nav-link:hover {
    color: var(--white);
    background: rgba(255,255,255,0.05);
    border-left-color: rgba(255,255,255,0.2);
}

.nav-item.active .nav-link {
    color: var(--white);
    background: rgba(255,255,255,0.1);
    border-left-color: var(--accent);
    font-weight: 500;
}

.sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255,255,255,0.08);
    flex-shrink: 0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-avatar {
    font-size: 1.8rem;
    color: rgba(255,255,255,0.5);
}

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

.user-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--white);
}

.user-role {
    font-size: 0.7rem;
    color: rgba(255,255,255,0.5);
    text-transform: capitalize;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1030;
    backdrop-filter: blur(2px);
}

/* =====================================================
   Main Content
   ===================================================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

/* =====================================================
   Topbar
   ===================================================== */
.topbar {
    height: var(--topbar-height);
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 1020;
    box-shadow: var(--shadow-sm);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--gray-600);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
    display: none;
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.page-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.topbar-btn {
    background: none;
    border: none;
    font-size: 1.1rem;
    color: var(--gray-600);
    cursor: pointer;
    padding: 8px 12px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

.topbar-btn:hover {
    background: var(--gray-100);
    color: var(--primary);
}

.notification-badge {
    position: absolute;
    top: 2px;
    right: 4px;
    background: var(--danger);
    color: var(--white);
    font-size: 0.6rem;
    font-weight: 700;
    padding: 2px 5px;
    border-radius: 10px;
    min-width: 16px;
    text-align: center;
    line-height: 1;
}

.notification-dropdown {
    width: 360px;
    padding: 0;
    border: none;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius);
}

.notification-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-200);
}

.notification-header h6 {
    margin: 0;
    font-weight: 600;
}

.mark-all-read {
    font-size: 0.75rem;
    color: var(--primary);
}

.notification-body {
    max-height: 350px;
    overflow-y: auto;
}

.notification-empty {
    padding: 30px;
    text-align: center;
    color: var(--gray-500);
}

.notification-empty i {
    font-size: 2rem;
    margin-bottom: 8px;
}

.notification-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    color: var(--gray-700);
    transition: var(--transition);
}

.notification-item:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

.notification-item.unread {
    background: var(--primary-bg);
}

.notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 0.8rem;
}

.notification-icon.info { background: rgba(66,133,244,0.1); color: var(--info); }
.notification-icon.success { background: rgba(15,157,88,0.1); color: var(--success); }
.notification-icon.warning { background: rgba(244,180,0,0.1); color: var(--warning); }
.notification-icon.danger { background: rgba(234,67,53,0.1); color: var(--danger); }

.notification-title {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.notification-text {
    font-size: 0.75rem;
    color: var(--gray-600);
    margin-bottom: 2px;
}

.notification-time {
    font-size: 0.7rem;
    color: var(--gray-500);
}

.user-menu-btn {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-avatar-sm {
    font-size: 1.5rem;
    color: var(--gray-500);
}

.user-name-sm {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-700);
}

/* =====================================================
   Content Area
   ===================================================== */
.content-area {
    padding: 24px;
    flex: 1;
}

/* =====================================================
   Cards
   ===================================================== */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    background: var(--white);
}

.card:hover {
    box-shadow: var(--shadow);
}

.card-header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 20px;
    font-weight: 600;
    border-radius: var(--border-radius) var(--border-radius) 0 0 !important;
}

.card-body {
    padding: 20px;
}

/* Dashboard Stats Cards */
.stat-card {
    border: none;
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.stat-card .stat-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.stat-card .stat-details h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2px;
    line-height: 1;
}

.stat-card .stat-details p {
    font-size: 0.75rem;
    color: var(--gray-600);
    margin: 0;
    font-weight: 500;
}

/* Stat card color variants */
.stat-card.primary::before { background: var(--primary); }
.stat-card.primary .stat-icon { background: var(--primary-bg); color: var(--primary); }

.stat-card.success::before { background: var(--success); }
.stat-card.success .stat-icon { background: rgba(15,157,88,0.1); color: var(--success); }

.stat-card.warning::before { background: var(--warning); }
.stat-card.warning .stat-icon { background: rgba(244,180,0,0.1); color: var(--warning); }

.stat-card.danger::before { background: var(--danger); }
.stat-card.danger .stat-icon { background: rgba(234,67,53,0.1); color: var(--danger); }

.stat-card.info::before { background: var(--info); }
.stat-card.info .stat-icon { background: rgba(66,133,244,0.1); color: var(--info); }

.stat-card.accent::before { background: var(--accent); }
.stat-card.accent .stat-icon { background: rgba(0,188,212,0.1); color: var(--accent); }

/* =====================================================
   Tables
   ===================================================== */
.table {
    font-size: 0.85rem;
    margin-bottom: 0;
}

.table thead th {
    background: var(--gray-100);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--gray-700);
    border-bottom: 2px solid var(--gray-200);
    padding: 12px 16px;
    white-space: nowrap;
}

.table tbody td {
    padding: 12px 16px;
    vertical-align: middle;
    border-bottom: 1px solid var(--gray-100);
}

.table tbody tr:hover {
    background: var(--gray-100);
}

.table-responsive {
    border-radius: var(--border-radius);
}

/* DataTables custom styling */
.dataTables_wrapper .dataTables_length select,
.dataTables_wrapper .dataTables_filter input {
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    padding: 6px 12px;
    font-size: 0.85rem;
}

.dataTables_wrapper .dataTables_info {
    font-size: 0.8rem;
    color: var(--gray-600);
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    transition: var(--transition);
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}

.btn-success {
    background: var(--success);
    border-color: var(--success);
}

.btn-success:hover {
    background: #0a8a4a;
    transform: translateY(-1px);
}

.btn-danger {
    background: var(--danger);
    border-color: var(--danger);
}

.btn-warning {
    background: var(--warning);
    border-color: var(--warning);
    color: var(--gray-900);
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.78rem;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
}

/* =====================================================
   Forms
   ===================================================== */
.form-control, .form-select {
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-sm);
    padding: 8px 12px;
    font-size: 0.85rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.form-label {
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--gray-700);
    margin-bottom: 4px;
}

.input-group-text {
    background: var(--gray-100);
    border-color: var(--gray-300);
    font-size: 0.85rem;
}

/* =====================================================
   Badges
   ===================================================== */
.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.3px;
}

/* =====================================================
   Modal
   ===================================================== */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
}

.modal-header {
    border-bottom: 1px solid var(--gray-200);
    padding: 16px 20px;
}

.modal-title {
    font-weight: 600;
    font-size: 1rem;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 12px 20px;
}

/* =====================================================
   Login Page
   ===================================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,188,212,0.15) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    border-radius: 50%;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(26,115,232,0.1) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    border-radius: 50%;
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    padding: 40px;
    position: relative;
    z-index: 1;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header .login-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.5rem;
    color: var(--white);
}

.login-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.login-header p {
    color: var(--gray-600);
    font-size: 0.85rem;
}

.login-card .form-control {
    padding: 12px 16px;
    font-size: 0.9rem;
}

.login-card .btn-primary {
    padding: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
}

.login-card .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #0d47a1);
}

/* =====================================================
   Action Toolbar
   ===================================================== */
.action-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.filter-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-bar .form-control,
.filter-bar .form-select {
    width: auto;
    min-width: 150px;
}

/* =====================================================
   Patient History Timeline
   ===================================================== */
.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gray-300);
}

.timeline-item {
    position: relative;
    padding-bottom: 20px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--primary);
    border: 2px solid var(--white);
    box-shadow: 0 0 0 2px var(--primary);
}

/* =====================================================
   Empty States
   ===================================================== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state h5 {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 0.85rem;
    max-width: 400px;
    margin: 0 auto;
}

/* =====================================================
   Print Styles
   ===================================================== */
@media print {
    .sidebar, .topbar, .sidebar-overlay, .no-print {
        display: none !important;
    }
    .main-content {
        margin-left: 0 !important;
    }
    .content-area {
        padding: 0 !important;
    }
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}

/* =====================================================
   Responsive
   ===================================================== */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .sidebar-overlay.show {
        display: block;
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .sidebar-toggle {
        display: block;
    }
}

@media (max-width: 767.98px) {
    .content-area {
        padding: 16px;
    }
    
    .topbar {
        padding: 0 16px;
    }
    
    .page-title {
        font-size: 1rem;
    }
    
    .action-toolbar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-bar {
        flex-direction: column;
    }
    
    .filter-bar .form-control,
    .filter-bar .form-select {
        width: 100%;
        min-width: auto;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-card .stat-details h3 {
        font-size: 1.2rem;
    }
    
    .notification-dropdown {
        width: 300px;
    }
}

@media (max-width: 575.98px) {
    .login-card {
        margin: 16px;
        padding: 30px 24px;
    }
    
    .table-responsive {
        font-size: 0.8rem;
    }
    
    .btn-group .btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }
}

/* =====================================================
   Utilities
   ===================================================== */
.text-primary { color: var(--primary) !important; }
.bg-primary-light { background: var(--primary-bg) !important; }
.border-primary { border-color: var(--primary) !important; }

.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }

.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }

.cursor-pointer { cursor: pointer; }

/* Toast notifications */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
}

/* Loading overlay */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.spinner-grow-sm {
    width: 0.75rem;
    height: 0.75rem;
}

/* Verification Page */
.verification-page {
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.verification-card {
    max-width: 500px;
    width: 100%;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    text-align: center;
}

.verification-card .icon-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
}

.icon-circle.success {
    background: rgba(15,157,88,0.1);
    color: var(--success);
}

.icon-circle.danger {
    background: rgba(234,67,53,0.1);
    color: var(--danger);
}

.icon-circle.warning {
    background: rgba(244,180,0,0.1);
    color: var(--warning);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}