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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    margin-bottom: 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.header-content {
    padding: 25px;
    text-align: center;
}

.header h1 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.header h1 i {
    color: #3498db;
    margin-right: 15px;
}

.header p {
    color: #7f8c8d;
    font-size: 1rem;
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 8px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    gap: 8px;
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    border: none;
    background: transparent;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: #7f8c8d;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.tab-btn:hover {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.tab-btn.active {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.tab-btn i {
    font-size: 1.1rem;
}

/* Tab Content */
.tab-content {
    animation: fadeIn 0.4s ease-out;
}

/* Main Content */
.main-content {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

/* Layout nằm ngang */
.form-layout-horizontal {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
    align-items: start;
}

.form-column {
    display: flex;
    flex-direction: column;
}

.left-column {
    min-height: 100%;
}

.right-column {
    position: sticky;
    top: 20px;
}

/* Form Sections */
.form-section {
    margin-bottom: 30px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #3498db;
    height: fit-content;
}

.settings-section {
    border-left-color: #e67e22;
}

.form-section h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.3rem;
    font-weight: 600;
}

.form-section h2 i {
    color: #3498db;
    margin-right: 10px;
}

.settings-section h2 i {
    color: #e67e22;
}

/* Form Rows */
.form-row {
    margin-bottom: 20px;
}

.form-row:last-child {
    margin-bottom: 0;
}

/* Form Groups */
.form-group {
    margin-bottom: 0;
}

.form-group.full-width {
    width: 100%;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 0.95rem;
}

.form-group label i {
    color: #3498db;
    margin-right: 8px;
    width: 16px;
}

/* Compact radio group cho cột phải */
.radio-group.compact .radio-item {
    margin-bottom: 10px;
}

.radio-group.compact .radio-item label {
    padding: 12px;
    font-size: 0.9rem;
}

/* Preview Section */
.preview-section {
    margin-top: 20px;
    padding: 20px;
    background: linear-gradient(135deg, #e8f4f8, #f0f8ff);
    border-radius: 10px;
    border: 2px solid #3498db;
}

.preview-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.1rem;
    font-weight: 600;
}

.preview-section h3 i {
    color: #3498db;
    margin-right: 8px;
}

.quick-preview {
    background: white;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #e1e8ed;
}

.preview-title-mini {
    font-size: 1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.3;
    min-height: 20px;
    font-style: italic;
    opacity: 0.7;
}

.preview-head-mini {
    font-size: 0.85rem;
    color: #555;
    margin-bottom: 12px;
    line-height: 1.4;
    min-height: 16px;
    font-style: italic;
    opacity: 0.7;
}

.preview-stats {
    display: flex;
    gap: 15px;
    padding-top: 10px;
    border-top: 1px solid #e1e8ed;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
    color: #7f8c8d;
}

.stat-item i {
    color: #3498db;
    font-size: 0.75rem;
}

/* Content Editor - tối ưu cho layout ngang */
.content-editor {
    min-height: 250px;
    max-height: 400px;
    padding: 16px;
    border: 2px solid #e1e8ed;
    border-radius: 0 0 8px 8px;
    background: white;
    overflow-y: auto;
    transition: all 0.3s ease;
}

/* Input Styles */
input[type="text"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

input[type="text"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Channel Select Styling */
select#channelId {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

select#channelId option {
    padding: 8px 12px;
    line-height: 1.5;
}

select#channelId option[style*="font-weight: bold"] {
    background: #f8f9fa;
    color: #2c3e50;
    border-bottom: 1px solid #e1e8ed;
}

select#channelId option[style*="padding-left"] {
    color: #555;
    background: #ffffff;
}

/* Content Editor */
.editor-toolbar {
    display: flex;
    gap: 5px;
    margin-bottom: 10px;
    padding: 10px;
    background: #f1f3f4;
    border-radius: 8px 8px 0 0;
    border: 2px solid #e1e8ed;
    border-bottom: none;
}

.toolbar-btn {
    padding: 8px 12px;
    border: none;
    background: white;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #555;
}

.toolbar-btn:hover {
    background: #e3f2fd;
    color: #3498db;
}

.content-editor {
    min-height: 300px;
    padding: 16px;
    border: 2px solid #e1e8ed;
    border-radius: 0 0 8px 8px;
    background: white;
    overflow-y: auto;
    transition: all 0.3s ease;
}

.content-editor:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.content-editor[data-placeholder]:empty:before {
    content: attr(data-placeholder);
    color: #aaa;
    font-style: italic;
}

/* Radio Groups */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.radio-item {
    position: relative;
}

.radio-item input[type="radio"] {
    display: none;
}

.radio-item label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 15px;
    background: white;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.radio-item label:hover {
    border-color: #3498db;
    background: #f8fafe;
}

.radio-item input[type="radio"]:checked + label {
    border-color: #3498db;
    background: #e3f2fd;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid #ddd;
    border-radius: 50%;
    margin-right: 15px;
    position: relative;
    transition: all 0.3s ease;
}

.radio-item input[type="radio"]:checked + label .radio-custom {
    border-color: #3498db;
}

.radio-item input[type="radio"]:checked + label .radio-custom:after {
    content: '';
    width: 8px;
    height: 8px;
    background: #3498db;
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.radio-text {
    display: flex;
    flex-direction: column;
}

.radio-text strong {
    color: #2c3e50;
    margin-bottom: 4px;
}

.radio-text small {
    color: #7f8c8d;
    font-size: 0.9rem;
}

/* Delay Group */
.delay-group {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 20px;
    margin-top: 15px;
}

.delay-group .datetime-input {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
    margin-bottom: 15px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Vietnamese datetime format styling */
input[type="datetime-local"] {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-text {
    color: #7f8c8d;
    padding: 0 0.3em;
}

input[type="datetime-local"]::-webkit-datetime-edit-month-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-day-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-year-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-hour-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-minute-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-second-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-datetime-edit-ampm-field {
    color: #2c3e50;
}

input[type="datetime-local"]::-webkit-calendar-picker-indicator {
    background-image: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="%233498db"><path d="M19 3h-1V1h-2v2H8V1H6v2H5c-1.11 0-1.99.9-1.99 2L3 19c0 1.1.89 2 2 2h14c1.1 0 2-.9 2-2V5c0-1.1-.9-2-2-2zm0 16H5V8h14v11zM7 10h5v5H7z"/></svg>');
    background-size: 20px;
    cursor: pointer;
}

.delay-group .datetime-input:focus {
    outline: none;
    border-color: #f39c12;
    box-shadow: 0 0 0 3px rgba(243, 156, 18, 0.1);
}

.quick-schedule-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 15px;
}

.quick-btn {
    padding: 8px 12px;
    border: 2px solid #f39c12;
    background: white;
    color: #f39c12;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.quick-btn:hover {
    background: #f39c12;
    color: white;
    transform: translateY(-1px);
}

.quick-btn i {
    font-size: 0.8rem;
}

.quick-btn-seconds {
    border-color: #e74c3c;
    color: #e74c3c;
    background: #fff5f5;
}

.quick-btn-seconds:hover {
    background: #e74c3c;
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

.quick-btn-seconds i {
    color: inherit;
}

/* Character/Word Count */
.char-count,
.word-count {
    display: block;
    text-align: right;
    color: #7f8c8d;
    font-size: 0.85rem;
    margin-top: 5px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    min-width: 120px;
    justify-content: center;
}

.btn-primary {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: white;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2980b9, #1f618d);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
    transform: translateY(-2px);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    padding-top: 30px;
    border-top: 2px solid #ecf0f1;
    margin-top: 40px;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-content {
    background: white;
    padding: 40px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 15px;
    max-width: 90%;
    max-height: 90%;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 20px 30px;
    border-bottom: 2px solid #ecf0f1;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header.success {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    border-bottom: none;
}

.modal-header h2 {
    margin: 0;
    color: inherit;
}

.close-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: inherit;
    opacity: 0.7;
}

.close-btn:hover {
    opacity: 1;
}

.modal-body {
    padding: 30px;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-footer {
    padding: 20px 30px;
    border-top: 2px solid #ecf0f1;
    display: flex;
    gap: 15px;
    justify-content: flex-end;
}

/* Preview Content */
.preview-article {
    max-width: 800px;
    margin: 0 auto;
}

.preview-title {
    font-size: 2rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 15px;
    line-height: 1.3;
}

.preview-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
    font-size: 0.9rem;
}

.preview-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
    color: #7f8c8d;
}

.preview-head {
    font-size: 1.2rem;
    color: #555;
    font-style: italic;
    margin-bottom: 25px;
    padding: 20px;
    background: #e8f4f8;
    border-left: 4px solid #3498db;
    border-radius: 0 8px 8px 0;
}

.preview-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #333;
}

/* Success Content */
.success-info {
    text-align: center;
}

.success-info .success-icon {
    font-size: 4rem;
    color: #27ae60;
    margin-bottom: 20px;
}

.success-details {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    text-align: left;
}

.success-details h3 {
    color: #2c3e50;
    margin-bottom: 15px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    padding: 8px 0;
    border-bottom: 1px solid #ecf0f1;
}

.detail-label {
    font-weight: 600;
    color: #555;
}

.detail-value {
    color: #333;
    text-align: right;
    max-width: 60%;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .form-layout-horizontal {
        grid-template-columns: 1.5fr 1fr;
        gap: 25px;
    }
    
    .articles-grid {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

@media (max-width: 992px) {
    .form-layout-horizontal {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .right-column {
        position: static;
        order: -1; /* Đưa cài đặt lên trên trên mobile */
    }
    
    .settings-section {
        margin-bottom: 20px;
    }
    
    .preview-section {
        margin-top: 0;
    }
    
    .filters-section {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }
    
    .header-content {
        padding: 20px;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .form-section {
        padding: 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .modal-content {
        max-width: 95%;
        margin: 20px;
    }
    
    .preview-meta {
        flex-direction: column;
        gap: 10px;
    }
    
    .preview-stats {
        justify-content: space-between;
    }
    
    .stat-item {
        flex: 1;
        justify-content: center;
    }
    
    .tab-navigation {
        flex-direction: column;
        gap: 4px;
    }
    
    .tab-btn {
        justify-content: center;
        padding: 12px 16px;
        font-size: 0.9rem;
    }
    
    .section-header {
        padding: 20px;
    }
    
    .filters-section {
        padding: 15px;
    }
    
    .article-card-footer {
        flex-direction: column;
        gap: 10px;
        align-items: stretch;
    }
    
    .send-notification-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-section {
    animation: fadeIn 0.6s ease-out;
}

/* Validation Styles */
.form-group.error input,
.form-group.error textarea,
.form-group.error select {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.error-message {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 5px;
    display: flex;
    align-items: center;
    gap: 5px;
}

.error-message i {
    font-size: 0.8rem;
}

/* Notification Section Styles */
.notification-section {
    padding: 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding: 25px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #e67e22;
}

.section-header h2 {
    color: #2c3e50;
    margin: 0;
    font-size: 1.4rem;
    font-weight: 600;
}

.section-header h2 i {
    color: #e67e22;
    margin-right: 10px;
}

.section-header p {
    color: #7f8c8d;
    margin: 5px 0 0 0;
    font-size: 0.95rem;
}

/* Filters Section */
.filters-section {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
    padding: 20px;
    background: white;
    border-radius: 10px;
    border: 2px solid #e1e8ed;
}

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

.filter-group label {
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.filter-group label i {
    color: #3498db;
    margin-right: 8px;
}

.filter-group input,
.filter-group select {
    padding: 10px 12px;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.filter-group input:focus,
.filter-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Articles Container */
.articles-container {
    min-height: 400px;
    position: relative;
}

.loading-articles {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: #7f8c8d;
}

.loading-articles .spinner {
    width: 40px;
    height: 40px;
    margin-bottom: 15px;
}

.no-articles {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: #7f8c8d;
}

.no-articles i {
    font-size: 3rem;
    margin-bottom: 15px;
    color: #bdc3c7;
}

/* Articles Grid */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 20px;
    padding: 0;
}

.article-card {
    background: white;
    border-radius: 12px;
    border: 2px solid #e1e8ed;
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
}

.article-card:hover {
    border-color: #3498db;
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.15);
    transform: translateY(-2px);
}

.article-card-header {
    padding: 15px;
    background: #f8f9fa;
    border-bottom: 1px solid #e1e8ed;
}

.article-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #7f8c8d;
}

.article-channel {
    background: #e3f2fd;
    color: #1976d2;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 500;
}

.article-card-body {
    padding: 15px;
}

.article-head {
    color: #555;
    font-size: 0.95rem;
    line-height: 1.4;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-image {
    width: 100%;
    height: 120px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 15px;
}

.article-card-footer {
    padding: 15px;
    background: #f8f9fa;
    border-top: 1px solid #e1e8ed;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.article-id {
    font-size: 0.8rem;
    color: #7f8c8d;
    font-weight: 500;
}

.send-notification-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, #e67e22, #d35400);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.send-notification-btn:hover {
    background: linear-gradient(135deg, #d35400, #c0392b);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(230, 126, 34, 0.3);
}

/* Article Info Preview in Modal */
.article-info-preview {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    margin-bottom: 25px;
    border-left: 4px solid #3498db;
}

.article-info-preview h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.article-info-preview .info-item {
    display: flex;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.article-info-preview .info-label {
    font-weight: 600;
    color: #555;
    min-width: 100px;
    margin-right: 10px;
}

.article-info-preview .info-value {
    color: #333;
}

/* Notification Options */
.notification-options h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.1rem;
    font-weight: 600;
}

.notification-options h3 i {
    color: #e67e22;
    margin-right: 8px;
}

.delay-input-group {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 8px;
    padding: 15px;
    margin-top: 15px;
}

.delay-input-group label {
    display: block;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 8px;
    font-size: 0.95rem;
}

.delay-input-group label i {
    color: #f39c12;
    margin-right: 8px;
}

.delay-input-group input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
    font-size: 0.95rem;
}

.delay-input-group small {
    display: block;
    color: #7f8c8d;
    font-size: 0.85rem;
    margin-top: 5px;
}