/* 
 * Digital Asset Management System
 * Main Stylesheet
 * Enhanced version with modern design elements
 */

/* Custom Properties (Variables) */
:root {
    --primary-color: #4361ee;
    --primary-dark: #3a56d4;
    --primary-light: #4895ef;
    --secondary-color: #4cc9f0;
    --success-color: #2ec4b6;
    --warning-color: #ff9f1c;
    --danger-color: #e71d36;
    --info-color: #4895ef;
    --dark-color: #1d3557;
    --light-color: #f8f9fa;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
    --font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* General Styles */
body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--font-family);
    color: var(--gray-800);
    background-color: var(--gray-100);
    line-height: 1.6;
}

main {
    flex: 1;
    padding: 2rem 0;
}

.footer {
    margin-top: auto;
    padding: 1.5rem 0;
    background: linear-gradient(to right, var(--gray-800), var(--dark-color));
    color: var(--light-color);
    border-top: 1px solid var(--gray-300);
}

.footer .text-muted {
    color: var(--gray-300) !important;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-color);
}

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

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

/* Navbar Styling */
.navbar {
    padding: 1rem 0;
    background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.navbar-dark .navbar-nav .nav-link:hover,
.navbar-dark .navbar-nav .nav-link:focus {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

.navbar-dark .navbar-nav .active > .nav-link {
    color: white;
    background-color: rgba(255, 255, 255, 0.15);
}

.dropdown-menu {
    border: none;
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    padding: 0.5rem;
}

.dropdown-item {
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    transition: var(--transition);
}

.dropdown-item:hover, 
.dropdown-item:focus {
    background-color: var(--primary-light);
    color: white;
}

/* Card Styles */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    margin-bottom: 1.5rem;
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.card-header {
    background-color: rgba(0, 0, 0, 0.03);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Button Styles */
.btn {
    border-radius: var(--border-radius);
    padding: 0.5rem 1.25rem;
    font-weight: 500;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

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

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

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

.btn-outline-primary {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.875rem;
}

/* Table Styles */
.table {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table th {
    font-weight: 600;
    color: var(--gray-700);
    border-top: none;
    border-bottom: 2px solid var(--gray-300);
    padding: 1rem;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid var(--gray-200);
}

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

.table-hover tbody tr:hover {
    background-color: rgba(67, 97, 238, 0.05);
}

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

/* Asset Grid */
.asset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

.asset-card {
    height: 100%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border-radius: var(--border-radius);
    overflow: hidden;
    background-color: white;
}

.asset-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.asset-thumbnail {
    height: 180px;
    background-color: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid var(--gray-200);
}

.asset-thumbnail img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

.asset-card:hover .asset-thumbnail img {
    transform: scale(1.05);
}

.asset-thumbnail .file-icon {
    font-size: 3.5rem;
    color: var(--gray-600);
    transition: var(--transition);
}

.asset-card:hover .asset-thumbnail .file-icon {
    transform: scale(1.1);
}

.asset-info {
    padding: 1rem;
}

.asset-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--gray-800);
}

.asset-meta {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Status Badges */
.badge {
    padding: 0.5rem 0.75rem;
    font-weight: 500;
    border-radius: 50rem;
}

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

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

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

.bg-secondary {
    background-color: var(--gray-600) !important;
}

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

/* File Type Icons */
.file-icon-image {
    color: var(--success-color);
}

.file-icon-document {
    color: var(--primary-color);
}

.file-icon-video {
    color: var(--danger-color);
}

.file-icon-audio {
    color: #6f42c1;
}

.file-icon-archive {
    color: var(--warning-color);
}

.file-icon-other {
    color: var(--gray-600);
}

/* Dashboard Stats */
.stats-card {
    text-align: center;
    padding: 2rem;
    border-radius: var(--border-radius);
    background-color: white;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.stats-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.1);
}

.stats-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.stats-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--gray-800);
}

.stats-label {
    font-size: 1.1rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* Filters */
.filter-card {
    position: sticky;
    top: 20px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

/* Asset Preview */
.asset-preview {
    max-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--gray-100);
    border-radius: var(--border-radius);
    padding: 2rem;
}

.asset-preview img {
    max-width: 100%;
    max-height: 500px;
    object-fit: contain;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    border-radius: 0.25rem;
}

.asset-preview .file-icon {
    font-size: 6rem;
    color: var(--gray-600);
}

/* Activity Timeline */
.timeline {
    position: relative;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.75rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--primary-light);
}

.timeline-item {
    position: relative;
    padding-bottom: 2rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.75rem;
    top: 0.25rem;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 0 2px var(--primary-light);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-date {
    font-size: 0.875rem;
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.timeline-content {
    background-color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

/* Tags */
.tag-badge {
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 50rem;
    background-color: var(--gray-200);
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
}

.tag-badge:hover {
    background-color: var(--primary-light);
    color: white;
}

/* Upload Form */
.upload-preview {
    max-width: 100%;
    max-height: 200px;
    display: none;
    margin-top: 1rem;
    border-radius: var(--border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.drag-drop-area {
    border: 2px dashed var(--gray-400);
    border-radius: var(--border-radius);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background-color: white;
}

.drag-drop-area:hover,
.drag-drop-area.dragover {
    background-color: var(--gray-100);
    border-color: var(--primary-color);
}

.drag-drop-icon {
    font-size: 3rem;
    color: var(--gray-500);
    margin-bottom: 1rem;
}

.drag-drop-text {
    color: var(--gray-700);
    font-weight: 500;
}

/* Analytics */
.chart-container {
    position: relative;
    height: 350px;
    margin-bottom: 2rem;
    background-color: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

/* Login Page */
.login-container {
    max-width: 450px;
    padding: 2.5rem;
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.1);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.login-form .form-control {
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
}

.login-form .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
}

.login-form .btn {
    padding: 0.75rem 1rem;
    font-weight: 600;
}

/* Form Styles */
.form-control {
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--gray-300);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
}

.form-label {
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-text {
    color: var(--gray-600);
}

/* Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.25rem;
}

.alert-danger {
    background-color: #ffebee;
    color: #c62828;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.alert-warning {
    background-color: #fff8e1;
    color: #f57f17;
}

.alert-info {
    background-color: #e3f2fd;
    color: #1565c0;
}

/* Responsive adjustments */
@media (max-width: 992px) {
    .navbar {
        padding: 0.75rem 0;
    }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card-body {
        padding: 1.25rem;
    }
    
    .stats-number {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .asset-grid {
        grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    }
    
    .stats-icon {
        font-size: 2.5rem;
    }
    
    .stats-number {
        font-size: 1.75rem;
    }
    
    .timeline {
        padding-left: 2rem;
    }
    
    .drag-drop-area {
        padding: 2rem;
    }
}

@media (max-width: 576px) {
    main {
        padding: 1.5rem 0;
    }
    
    .card-header {
        padding: 0.75rem 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table th, 
    .table td {
        padding: 0.75rem;
    }
    
    .asset-grid {
        grid-template-columns: 1fr;
    }
    
    .login-container {
        padding: 1.5rem;
    }
}

/* Custom animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

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