:root {
    --primary-color: #2c7fb8;
    --secondary-color: #7fcdbb;
    --accent-color: #edf8b1;
    --light-color: #f7f7f7;
    --dark-color: #253237;
    --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 8px 24px rgba(0, 0, 0, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius: 10px;
    --sidebar-width: 250px;
    --sidebar-collapsed-width: 80px;
}

/* Base Styles */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--dark-color);
    background-color: #f8f9fa;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-warning {
    color: #ffc107 !important;
}

.bg-dark {
    background-color: #212529 !important;
}

.bg-primary {
    background-color: var(--primary-color) !important;
}

.bg-success {
    background-color: var(--secondary-color) !important;
}

/* Smooth transitions for all interactive elements */
.btn, .nav-link, .card, .sidebar, .main-dashboard-content, 
.dashboard-footer, .modal-content, .navbar, .feature-card {
    transition: all var(--transition-normal);
}

/* Layout Structure */
.main-content {
    flex: 1 0 auto;
    width: 100%;
}

#homepage,
#loginSection,
#dashboardSection,
#pengetahuanDetail {
    width: 100%;
}

main, #homepage, #loginSection {
    flex: 1;
}

/* Navigation */
.navbar {
    background-color: var(--primary-color);
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

.navbar-brand, .nav-link {
    color: white !important;
    transition: color var(--transition-fast);
}

.nav-link:hover {
    color: var(--accent-color) !important;
}

#navbarNav {
    font-size: larger;
    font-weight: 500;
}

header .sticky-top {
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1030;
    background-color: var(--primary-color);
    box-shadow: var(--shadow-light);
}

/* Hero Section */
.hero-section {
    position: relative;
    background-image: url('img/banner.jpeg');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 150px 0;
    text-align: center;
    margin-top: 67px;
}

/* Section Titles */
.section-title {
    color: var(--primary-color);
    border-bottom: 2px solid var(--secondary-color);
    padding-bottom: 10px;
    margin-bottom: 30px;
    transition: all var(--transition-normal);
}

/* Cards */
.feature-card, .dashboard-card, .card {
    border: none;
    border-radius: var(--border-radius);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    box-shadow: var(--shadow-light);
    overflow: hidden;
}

.feature-card:hover, .dashboard-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.feature-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    transition: transform var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1);
}

/* Login Section */
.login-container {
    max-width: 400px;
    margin: 10% auto;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    background-color: white;
    transition: all var(--transition-normal);
}

body.login-active {
    /* background: linear-gradient(rgb(44 173 184 / 80%), rgb(224 142 225 / 80%)); */
    background-image: url('img/banner.jpeg');
    background-size: contain;
    background-position: center center;
    background-repeat: round;
}

/* Buttons */
.btn {
    border-radius: 6px;
    transition: all var(--transition-fast);
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: #23689c;
    border-color: #23689c;
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

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

.btn-success:hover {
    background-color: #6dbda9;
    border-color: #6dbda9;
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

/* Footer */
footer, .dashboard-footer {
    background-color: var(--dark-color);
    color: white;
    padding: 30px 0;
    margin-top: auto !important;
    width: 100%;
    flex-shrink: 0;
    transition: all var(--transition-normal);
}

/* Dashboard Layout */
#dashboardSection {
    min-height: calc(100vh - 56px);
    margin-top: 56px; /* Account for fixed navbar */
}

.dashboard-layout {
    display: flex;
    min-height: calc(100vh - 56px);
    width: 100%;
    transition: all var(--transition-normal);
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: #212529;
    color: white;
    overflow-y: auto;
    transition: all var(--transition-normal);
    z-index: 1000;
    flex-shrink: 0;
    height: calc(100vh - 56px);
    position: sticky;
    top: 56px;
    box-shadow: var(--shadow-light);
}

/* Sidebar collapsed state */
.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    transform: none !important;
}

.sidebar.collapsed .nav-link {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column; /* keep icon centered vertically */
    text-align: center;
    padding: 0.75rem 0;
    height: 3.5rem;
}

.sidebar.collapsed .nav-link i {
    margin: 0 !important;
    font-size: 1.3rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
}

.sidebar.collapsed .nav-link span,
.sidebar.collapsed h4,
.sidebar.collapsed #logoutBtn span {
    display: none;
}

.sidebar.collapsed .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: none;
}

.sidebar.collapsed #sidebarToggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 3.5rem;
    padding: 0;
    border: none;
    background: transparent;
    font-size: 1.3rem;
}

.sidebar.collapsed #sidebarToggle i {
    margin: 0;
}

/* Main content */
.main-dashboard-content {
    flex: 1;
    transition: all var(--transition-normal);
    padding: 1.5rem;
    overflow-x: auto;
    min-height: calc(100vh - 56px);
}

/* Adjust main content when sidebar collapsed */
.sidebar:not(.collapsed) + .main-dashboard-content {
    width: calc(100% - var(--sidebar-width));
}

.sidebar.collapsed + .main-dashboard-content {
    width: calc(100% - var(--sidebar-collapsed-width));
}

/* Toggle button styling */
#sidebarToggle {
    border: 1px solid rgba(255, 255, 255, 0.5);
    background: transparent;
    color: white;
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    border-radius: 4px;
}

#sidebarToggle:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
    transform: scale(1.05);
}

/* Sidebar navigation styles */
.sidebar .d-flex.justify-content-between {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 1rem;
    transition: all var(--transition-normal);
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    margin-bottom: 0.25rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
}

.sidebar .nav-link:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateX(5px);
}

.sidebar .nav-link.active {
    color: white;
    background-color: var(--primary-color);
}

.sidebar .nav-link i {
    margin-right: 0.75rem;
    width: 1.25rem;
    text-align: center;
    transition: margin var(--transition-normal);
}

/* Data Tables */
.data-table {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: all var(--transition-normal);
}

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

.table {
    margin-bottom: 0;
}

.table th {
    border-top: none;
    font-weight: 600;
    background-color: rgba(0, 0, 0, 0.03);
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.04);
    transform: translateY(-1px);
    transition: all var(--transition-fast);
}

/* Modal Styles */
.modal-content {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    transition: all var(--transition-normal);
}

.modal-header {
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.modal-footer {
    background-color: #f8f9fa;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

/* Form Controls */
.form-control, .form-select {
    border-radius: 6px;
    transition: all var(--transition-fast);
    border: 1px solid #ced4da;
    padding: 0.5rem 0.75rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(44, 127, 184, 0.25);
    transform: translateY(-1px);
}

/* Knowledge Detail Section */
#detailTitle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2.5%;
    transition: all var(--transition-normal);
}

#detailTitle .btn {
    font-size: 1rem;
    padding: 0.25rem 0.75rem;
}

#pengetahuanDetail iframe {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-normal);
}

/* Scrollbar Styling */
.sidebar {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) transparent;
}

.sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.5);
}

.main-dashboard-content::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.main-dashboard-content::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.main-dashboard-content::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

.main-dashboard-content::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}

/* Badges */
.badge {
    font-weight: 500;
    transition: all var(--transition-fast);
}

/* Loading States */
.loading {
    opacity: 0.7;
    pointer-events: none;
}

#learnMoreBtn {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background-color: lightgray;
    color: black;
}

/* Animation for new elements */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.fade-section {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
  }
  
  .fade-section.active {
    opacity: 1;
    visibility: visible;
}

/* Mobile Responsive Styles */
@media (max-width: 992px) {
    .hero-section {
        padding: 100px 0 80px;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .dashboard-layout {
        flex-direction: row;
        width: 100%;
        overflow: hidden;
    }
    
    .sidebar {
        position: relative;
        height: calc(100vh - 56px);
        width: var(--sidebar-collapsed-width);
        transform: none;
        transition: width var(--transition-normal);
        top: 19px;
    }

    .sidebar:not(.collapsed) {
        width: var(--sidebar-width);
    }
    
    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width) !important;
        transform: none !important;
    }
    
    .sidebar.collapsed .nav-link {
        justify-content: center;
        text-align: center;
        padding: 0.5rem 0.25rem;
    }
    
    .sidebar.collapsed .nav-link i {
        margin: 0 !important;
    }
    
    .sidebar.collapsed .nav-link span,
    .sidebar.collapsed h4,
    .sidebar.collapsed #logoutBtn span {
        display: none;
    }

    .main-dashboard-content {
        flex: 1;
        width: calc(100% - var(--sidebar-collapsed-width));
        transition: width var(--transition-normal);
    }

    .sidebar:not(.collapsed) + .main-dashboard-content {
        width: calc(100% - var(--sidebar-width));
    }
    
    /* Mobile sidebar toggle indicator */
    .mobile-sidebar-toggle {
        position: fixed;
        top: 70px;
        left: 15px;
        background: var(--primary-color);
        color: white;
        padding: 10px 12px;
        border-radius: 50%;
        z-index: 1001;
        cursor: pointer;
        box-shadow: var(--shadow-medium);
        transition: all var(--transition-normal);
    }
    
    .mobile-sidebar-toggle:hover {
        transform: scale(1.1);
    }
    
    .dashboard-card .fa-2x {
        font-size: 1.5rem !important;
    }
    
    .login-container {
        margin: 20% auto;
        width: 90%;
    }

    .navbar-collapse {
        background-color: var(--primary-color);
    }
}

@media (max-width: 768px) {
    #learnMoreBtn {
        bottom: 20px;
        font-size: 1rem;
        padding: 0.6rem 1.2rem;
    }

    .hero-section {
        padding: 130px 0;
    }
    
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .feature-card, .dashboard-card {
        margin-bottom: 1rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
    
    .btn-sm {
        padding: 0.25rem 0.5rem;
        font-size: 0.775rem;
    }
    
    .main-dashboard-content {
        padding: 0.75rem;
    }
    
    .modal-dialog {
        margin: 0.5rem;
    }
    
    #detailTitle {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-section {
        padding: 130px 0 50px;
    }
    
    .hero-section h1 {
        font-size: 1.75rem;
    }
    
    .hero-section p.lead {
        font-size: 1rem;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .login-container {
        margin: 25% auto;
        padding: 20px;
    }
    
    .dashboard-card h2 {
        font-size: 1.5rem;
    }
    
    .modal-body .row.g-3 {
        margin: 0 -0.5rem;
    }
    
    .modal-body .col-md-6, 
    .modal-body .col-6, 
    .modal-body .col-12 {
        padding: 0 0.5rem;
    }
}

/* Print Styles */
@media print {
    .navbar, .sidebar, .dashboard-footer, footer, .btn {
        display: none !important;
    }
    
    .main-dashboard-content {
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }
    
    .card {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
    
    .table {
        font-size: 12px;
    }
}