/**
 * Material Design Stylesheet
 * Triển khai văn bản của Trung tâm Phát triển quỹ đất chi nhánh Long Thành
 */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

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

:root {
    /* Material Design Color Palette */
    --primary-color: #1976D2;
    --primary-dark: #0D47A1;
    --primary-light: #BBDEFB;
    --accent-color: #FF4081;
    --accent-dark: #C51162;

    /* Gradient Colors */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* Semantic Colors */
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --error-color: #F44336;
    --info-color: #2196F3;

    /* Neutral Colors */
    --text-primary: #212121;
    --text-secondary: #757575;
    --divider-color: #BDBDBD;
    --background: #F5F5F5;
    --surface: #FFFFFF;

    /* Shadows */
    --shadow-1: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-2: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --shadow-3: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    --shadow-4: 0 14px 28px rgba(0, 0, 0, 0.25), 0 10px 10px rgba(0, 0, 0, 0.22);
    --shadow-5: 0 19px 38px rgba(0, 0, 0, 0.30), 0 15px 12px rgba(0, 0, 0, 0.22);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 50%;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-lg) 0;
    box-shadow: var(--shadow-3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 500;
    color: white;
}

.logo-icon {
    font-size: 2.5rem;
}

.nav {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: white;
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

/* Hero Banner */
.hero {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-2xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="%23ffffff"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="%23ffffff"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%23ffffff"/></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-20px);
    }
}

.hero h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Stats Section */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: calc(var(--spacing-2xl) * -1) var(--spacing-md) var(--spacing-2xl);
    position: relative;
    z-index: 10;
}

.stat-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-5);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Card */
.card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
    overflow: hidden;
    transition: all var(--transition-base);
    margin-bottom: var(--spacing-lg);
}

.card:hover {
    box-shadow: var(--shadow-4);
    transform: translateY(-4px);
}

.card-header {
    padding: var(--spacing-lg);
    background: var(--gradient-primary);
    color: white;
    font-weight: 500;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--background);
    border-top: 1px solid var(--divider-color);
}

/* Document List */
.document-list {
    display: grid;
    gap: var(--spacing-lg);
}

.document-item {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-1);
    transition: all var(--transition-base);
    border-left: 4px solid var(--primary-color);
    cursor: pointer;
}

.document-item:hover {
    box-shadow: var(--shadow-3);
    transform: translateX(4px);
}

.document-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.document-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.document-number {
    display: inline-block;
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
}

.document-summary {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.document-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.document-meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Category Badge */
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
}

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn:active {
    transform: scale(0.96);
}

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

.btn-primary:hover {
    box-shadow: var(--shadow-3);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--gradient-secondary);
    color: white;
}

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

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

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

.btn-icon {
    padding: var(--spacing-md);
    border-radius: var(--radius-full);
    width: 48px;
    height: 48px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* Form */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--divider-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: 'Roboto', sans-serif;
    transition: all var(--transition-base);
    background: white;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.form-control::placeholder {
    color: var(--text-secondary);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

select.form-control {
    cursor: pointer;
}

/* Search Bar */
.search-bar {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
}

.search-input-wrapper {
    flex: 1;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) 48px;
    border: 2px solid var(--divider-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

/* Filter */
.filter-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.filter-select {
    min-width: 200px;
}

/* Table */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-2);
    background: white;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--gradient-primary);
    color: white;
}

thead th {
    padding: var(--spacing-lg);
    text-align: left;
    font-weight: 500;
}

tbody td {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--divider-color);
}

tbody tr {
    transition: background var(--transition-fast);
}

tbody tr:hover {
    background: var(--primary-light);
}

/* Alert */
.alert {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid var(--success-color);
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 4px solid var(--error-color);
}

.alert-warning {
    background: #FFF3E0;
    color: #E65100;
    border-left: 4px solid var(--warning-color);
}

.alert-info {
    background: #E3F2FD;
    color: #1565C0;
    border-left: 4px solid var(--info-color);
}

.alert-icon {
    font-size: 1.5rem;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* PDF Viewer */
.pdf-viewer {
    width: 100%;
    height: 600px;
    border: none;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3);
}

/* Loading Spinner */
.spinner {
    border: 4px solid var(--divider-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .nav {
        flex-direction: column;
        width: 100%;
    }

    .nav-link {
        width: 100%;
        justify-content: center;
    }

    .stats {
        grid-template-columns: 1fr;
        margin: var(--spacing-lg);
    }

    .search-bar {
        flex-direction: column;
    }

    .filter-group {
        flex-direction: column;
    }

    .filter-select {
        width: 100%;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}

.p-1 {
    padding: var(--spacing-sm);
}

.p-2 {
    padding: var(--spacing-md);
}

.p-3 {
    padding: var(--spacing-lg);
}

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 {
    gap: var(--spacing-sm);
}

.gap-2 {
    gap: var(--spacing-md);
}

.gap-3 {
    gap: var(--spacing-lg);
}

/* ===================================
   ATTACHMENT STYLES
   =================================== */

/* Attachments Container */
.attachments-container {
    background: #F9FAFB;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.attachments-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--divider-color);
}

.attachments-title {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

#attachmentsList {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Attachment Item */
.attachment-item {
    background: white;
    border: 2px solid var(--divider-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-base);
}

.attachment-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-2);
}

.attachment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.attachment-drag-handle {
    cursor: grab;
    font-size: 1.2rem;
    color: var(--divider-color);
}

.attachment-drag-handle:active {
    cursor: grabbing;
}

.attachment-icon {
    font-size: 1.5rem;
}

.attachment-number {
    font-weight: 500;
    color: var(--primary-color);
}

.attachment-fields {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.attachment-fields .form-group {
    margin-bottom: 0;
}

.btn-remove-attachment {
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 48px;
    height: 48px;
}

.btn-remove-attachment:hover {
    background: var(--accent-dark);
    transform: scale(1.1);
}

.btn-add-attachment {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-success);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-add-attachment:hover {
    box-shadow: var(--shadow-3);
    transform: translateY(-2px);
}

/* Attachment Card (for display on view page) */
.attachment-card {
    background: white;
    border: 2px solid var(--divider-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.attachment-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-2);
    transform: translateX(4px);
}

.attachment-card-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.attachment-card-info {
    flex: 1;
}

.attachment-card-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 1.1rem;
}

.attachment-card-type {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.attachment-card-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.attachment-card-actions .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

/* Empty state */
.attachments-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.attachments-empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 768px) {
    .attachment-fields {
        flex-direction: column;
    }

    .attachment-fields .form-group {
        width: 100%;
    }

    .btn-remove-attachment {
        width: 100%;
    }

    .attachment-card {
        flex-direction: column;
        text-align: center;
    }

    .attachment-card-actions {
        width: 100%;
        flex-direction: column;
    }

    .attachment-card-actions .btn {
        width: 100%;
    }
}

/* ===================================
   NEW UI/UX ENHANCEMENTS
   =================================== */

/* Floating Action Button (FAB) */
.fab {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: white;
    border: none;
    box-shadow: var(--shadow-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 1000;
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-5);
}

.fab .material-icons {
    font-size: 2rem;
}

/* Favorite/Bookmark Button */
.favorite-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all var(--transition-base);
    color: #BDBDBD;
}

.favorite-btn:hover {
    background: rgba(255, 193, 7, 0.1);
    color: #FFC107;
}

.favorite-btn.active {
    color: #FFC107;
    animation: heartbeat 0.3s ease-in-out;
}

@keyframes heartbeat {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }
}

/* Notification Bell */
.notification-bell {
    position: relative;
    cursor: pointer;
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--error-color);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.6;
    }
}

/* Toast Notifications */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    min-width: 300px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-4);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 10000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
}

.toast-close {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 4px;
}

.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast-error {
    border-left: 4px solid var(--error-color);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
}

.toast-info {
    border-left: 4px solid var(--info-color);
}

/* Document Relations */
.relations-container {
    background: #F5F5F5;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.relations-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--divider-color);
}

.relation-card {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-base);
    cursor: pointer;
}

.relation-card:hover {
    box-shadow: var(--shadow-2);
    transform: translateX(4px);
}

.relation-type {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
}

.relation-replaces {
    background: #FFF3E0;
    color: #E65100;
    border-left-color: #FF9800;
}

.relation-supplements {
    background: #E8F5E9;
    color: #2E7D32;
    border-left-color: #4CAF50;
}

.relation-revokes {
    background: #FFEBEE;
    color: #C62828;
    border-left-color: #F44336;
}

.relation-related {
    background: #E3F2FD;
    color: #1565C0;
    border-left-color: #2196F3;
}

.relation-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.relation-doc-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.relation-doc-number {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.relation-actions {
    display: flex;
    gap: 8px;
}

.btn-relation-remove {
    background: transparent;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all var(--transition-fast);
}

.btn-relation-remove:hover {
    background: rgba(244, 67, 54, 0.1);
}

/* Search Highlighting */
.search-highlight {
    background: #FFEB3B;
    padding: 2px 4px;
    border-radius: 3px;
    font-weight: 500;
}

/* Quick Stats Widgets */
.quick-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.quick-stat-widget {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-1);
    transition: all var(--transition-base);
}

.quick-stat-widget:hover {
    box-shadow: var(--shadow-3);
    transform: translateY(-4px);
}

.quick-stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.quick-stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quick-stat-icon {
    font-size: 2.5rem;
    opacity: 0.2;
    float: right;
}

/* Enhanced Breadcrumbs */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.breadcrumb-item {
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-item:hover {
    color: var(--primary-color);
}

.breadcrumb-separator {
    color: var(--divider-color);
}

.breadcrumb-item.active {
    color: var(--text-primary);
    font-weight: 500;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .fab {
        bottom: 16px;
        right: 16px;
        width: 56px;
        height: 56px;
    }

    .toast {
        min-width: calc(100% - 32px);
        right: 16px;
        top: 16px;
    }

    .quick-stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   TWO-COLUMN LAYOUT FOR LANDING PAGE
   =================================== */

/* Two-Column Grid Layout */
.two-column-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.main-content {
    min-width: 0;
    /* Prevent grid overflow */
}

.sidebar {
    position: sticky;
    top: calc(var(--spacing-2xl) + 80px);
    /* Account for header height */
    align-self: start;
}

/* Announcements Card Styling */
.announcements-card {
    background: linear-gradient(135deg, #FFF5F5 0%, #FFF 100%);
}

.announcements-card .card-header {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E8E 100%);
}

.announcements-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.announcement-item {
    background: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-base);
    border-left: 3px solid #FF6B6B;
    box-shadow: var(--shadow-1);
}

.announcement-item:hover {
    box-shadow: var(--shadow-3);
    transform: translateX(4px);
    border-left-color: #FF4444;
}

.announcement-icon {
    font-size: 2rem;
    flex-shrink: 0;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-5px);
    }
}

.announcement-content {
    flex: 1;
    min-width: 0;
}

.announcement-title {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.announcement-date {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.announcement-date .material-icons {
    font-size: 0.875rem;
}

/* ===================================
   PAGINATION CONTROLS
   =================================== */

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 2px solid var(--divider-color);
}

.pagination-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.pagination-btn:hover {
    box-shadow: var(--shadow-3);
    transform: translateY(-2px);
    color: white;
}

.pagination-btn:active {
    transform: scale(0.96);
}

.pagination-numbers {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.pagination-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: white;
    border: 2px solid var(--divider-color);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.pagination-number:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    color: var(--primary-dark);
}

.pagination-number.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-2);
}

.pagination-ellipsis {
    color: var(--text-secondary);
    padding: 0 var(--spacing-sm);
}

.pagination-info {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===================================
   RESPONSIVE DESIGN FOR TWO-COLUMN LAYOUT
   =================================== */

@media (max-width: 768px) {
    .two-column-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: relative;
        top: 0;
    }

    .announcements-card {
        order: -1;
        /* Show announcements above main content on mobile */
    }
}

@media (max-width: 768px) {
    .pagination {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
    }

    .pagination-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }

    .pagination-numbers {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }

    .pagination-number {
        width: 36px;
        height: 36px;
        font-size: 0.875rem;
    }

    .announcement-item {
        padding: var(--spacing-sm);
    }

    .announcement-icon {
        font-size: 1.5rem;
    }

    .announcement-title {
        font-size: 0.875rem;
    }
}