:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --primary-color: #3f51b5;
    --primary-hover: #4d61c4;
    --text-color: #e0e0e0;
    --text-muted: #888;
    --border-color: #333;
    --success-color: #4CAF50;
    --error-color: #f44336;
    --font-family: 'Inter', sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 2rem;
    line-height: 1.6;
}

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

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    color: #fff;
    font-weight: 700;
}

h2 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    margin-top: 0;
}

p {
    color: var(--text-muted);
}

#url-form {
    margin-bottom: 2rem;
}

.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

#url-input {
    flex-grow: 1;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background-color: var(--surface-color);
    color: var(--text-color);
    font-size: 1rem;
}

#url-form button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    background-color: var(--primary-color);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

#url-form button:hover {
    background-color: var(--primary-hover);
}

.config-section {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.config-section h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.config-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1rem;
}

#json-data-group {
    grid-column: 1 / -1;
}

#json-data {
    min-height: 100px;
    resize: vertical;
    font-family: monospace;
    font-size: 0.9rem;
    display: none; /* Initially hidden, shown when POST is selected */
}

select {
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1rem;
}

textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: inherit;
}

.hidden {
    display: none !important;
}

.loader {
    width: 48px;
    height: 48px;
    border: 5px solid #FFF;
    border-bottom-color: var(--primary-color);
    border-radius: 50%;
    display: block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
    margin: 2rem auto;
}

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

.error {
    text-align: center;
    padding: 1rem;
    background-color: rgba(244, 67, 54, 0.2);
    border: 1px solid var(--error-color);
    border-radius: 6px;
    color: var(--error-color);
    margin: 1rem 0;
}

.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.error-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

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

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

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

.btn-secondary:hover {
    background-color: #444;
}

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}

.selectors-actions {
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    flex-shrink: 0;
}

#results-container {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 0.5rem;
    height: 90vh;
    align-items: stretch;
}

.selectors-panel, .main-panel, .right-panel {
    background-color: var(--surface-color);
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.right-panel {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow: hidden;
}

.rss-panel, .storage-panel {
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.rss-panel {
    flex-shrink: 0;
}

.rss-panel h2 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.rss-panel p {
    margin-bottom: 1rem;
    font-size: 0.85rem;
    line-height: 1.4;
}

.storage-panel {
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.storage-panel h2 {
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.selectors-panel h2 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    flex-shrink: 0;
    font-size: 1.2rem;
}

.selectors-panel p {
    margin-bottom: 1rem;
    flex-shrink: 0;
    font-size: 0.9rem;
    line-height: 1.4;
}

.selectors-grid {
    display: grid;
    gap: 0.75rem;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
    margin-bottom: 1rem;
    padding-right: 0.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    margin-bottom: 0.5rem;
}

.form-group label {
    margin-bottom: 0.25rem;
    font-weight: 500;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.form-group input {
    width: 100%;
    box-sizing: border-box;
    padding: 0.4rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.85rem;
}

/* Main Panel Styles */
.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    margin: 0;
    border: none;
    padding: 0;
}

.panel-tabs {
    display: flex;
    gap: 0.5rem;
}

.panel-tab {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    border-radius: 4px 4px 0 0;
}

.panel-tab:hover {
    color: var(--text-color);
    background-color: rgba(255, 255, 255, 0.05);
}

.panel-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: rgba(63, 81, 181, 0.1);
}

.panel-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-section {
    flex: 1;
    overflow: hidden;
    display: none;
    flex-direction: column;
}

.panel-section.active {
    display: flex;
}

#preview-area {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    min-height: 0;
}

#html-source-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.preview-item {
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}
.preview-item:last-child {
    border-bottom: none;
}

.preview-item h3 {
    margin: 0 0 0.5rem 0;
}
.preview-item h3 a {
    text-decoration: none;
    color: var(--primary-hover);
    transition: color 0.2s;
}
.preview-item h3 a:hover {
    color: #fff;
}

.preview-item p {
    margin: 0.25rem 0;
    color: var(--text-muted);
}

.preview-item .meta {
    font-size: 0.85rem;
    color: #aaa;
    display: flex;
    gap: 1rem;
}

.no-items {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
}

.preview-error {
    text-align: center;
    padding: 2rem;
    color: var(--error-color);
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--error-color);
    border-radius: 6px;
    font-size: 0.9rem;
}

.rss-url-container {
    display: flex;
    gap: 0.5rem;
}

#rss-url {
    flex: 1;
    padding: 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 0.9rem;
    font-family: monospace;
}

.preview-item .url-display {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    word-break: break-all;
    font-family: monospace;
    background-color: rgba(255, 255, 255, 0.05);
    padding: 0.25rem 0.5rem;
    border-radius: 3px;
}

/* Checkbox styles */
.config-options {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-size: 0.9rem;
    line-height: 1.4;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 3px;
    background-color: var(--surface-color);
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all 0.2s ease;
}

.checkbox-label input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-label:hover .checkmark {
    border-color: var(--primary-hover);
}

.help-text {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 0.25rem;
    font-style: italic;
    line-height: 1.3;
}

/* HTML Viewer Styles */

.html-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
}

.html-tab {
    padding: 0.5rem 1rem;
    border: none;
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.html-tab:hover {
    color: var(--text-color);
    background-color: rgba(255, 255, 255, 0.05);
}

.html-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.html-content {
    flex: 1;
    overflow: hidden;
    position: relative;
    margin-top: 0;
    min-height: 0;
}

.html-source {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    margin: 0;
    padding: 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-color);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.8rem;
    line-height: 1.4;
    overflow: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
    display: none;
}

.html-source.active {
    display: block;
}

/* Storage Panel Styles */
.storage-panel {
    background-color: var(--surface-color);
    padding: 0.5rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.storage-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    flex-shrink: 0;
}

.storage-actions .btn {
    flex: 1;
    min-width: 150px;
}

.stored-configs {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.stored-configs h3 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.configs-list {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

.config-item {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    margin-bottom: 0.75rem;
    transition: all 0.2s ease;
    cursor: pointer;
}

.config-item:hover {
    border-color: var(--primary-color);
    background-color: rgba(63, 81, 181, 0.05);
}

.config-item:last-child {
    margin-bottom: 0;
}

.config-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.config-item-title {
    font-weight: 500;
    color: var(--text-color);
    margin: 0;
    font-size: 0.95rem;
}

.config-item-url {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: monospace;
    word-break: break-all;
    margin: 0.25rem 0;
}

.config-item-actions {
    display: flex;
    gap: 0.5rem;
}

.config-item-actions .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.config-item-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    display: flex;
    gap: 1rem;
}

.no-configs {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-style: italic;
}