/* ===== Base Styles ===== */
:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-light: #e0e7ff;
    --success: #059669;
    --success-hover: #047857;
    --success-light: #d1fae5;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --danger-light: #fee2e2;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
    min-height: 100vh;
}

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

a:hover {
    text-decoration: underline;
}

/* ===== App Container ===== */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Header ===== */
.app-header {
    background: var(--gray-900);
    color: white;
    padding: 16px 20px;
    margin-bottom: 24px;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 24px;
    color: var(--primary-light);
}

.logo h1 {
    font-size: 20px;
    font-weight: 600;
}

.badge {
    background: var(--primary);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.header-nav {
    display: flex;
    gap: 8px;
}

.nav-btn {
    background: transparent;
    color: var(--gray-300);
    border: 1px solid var(--gray-600);
    padding: 8px 16px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-btn:hover {
    background: var(--gray-700);
    color: white;
}

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

/* ===== Main Content ===== */
.app-main {
    padding-bottom: 40px;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== Step Cards ===== */
.step-card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.step-card.hidden {
    display: none;
}

.step-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    flex-wrap: wrap;
    gap: 10px;
}

.step-header h2 {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-number {
    background: var(--primary);
    color: white;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

.post-count {
    color: var(--gray-500);
    font-size: 14px;
    font-weight: 400;
}

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

.step-body {
    padding: 20px;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
}

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

.btn-success:hover:not(:disabled) {
    background: var(--success-hover);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--danger-hover);
}

.btn-outline {
    background: transparent;
    color: var(--gray-600);
    border: 1px solid var(--gray-300);
}

.btn-outline:hover:not(:disabled) {
    background: var(--gray-100);
    border-color: var(--gray-400);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

/* ===== Input Fields ===== */
.url-input {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

.url-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 12px;
}

.select-input {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    background: white;
    cursor: pointer;
    outline: none;
}

.select-input:focus {
    border-color: var(--primary);
}

.search-input {
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
    width: 200px;
}

.search-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.title-input {
    width: 100%;
    padding: 10px 14px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    outline: none;
    transition: var(--transition);
}

.title-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.content-editable {
    width: 100%;
    min-height: 300px;
    padding: 14px;
    border: 2px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

.content-editable:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* ===== Quick Feeds ===== */
.quick-feeds {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.quick-feeds .label {
    color: var(--gray-500);
    font-size: 13px;
}

/* ===== Post List ===== */
.post-list {
    display: grid;
    gap: 10px;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 4px;
}

.post-item {
    padding: 14px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    background: var(--gray-50);
}

.post-item:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.post-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 6px;
}

.post-item-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.4;
}

.post-item-date {
    font-size: 12px;
    color: var(--gray-500);
    white-space: nowrap;
}

.post-item-desc {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: 8px;
}

.post-item-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--gray-500);
}

.post-item-meta i {
    margin-right: 4px;
}

/* ===== Content Panels ===== */
.content-panels {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

@media (max-width: 900px) {
    .content-panels {
        grid-template-columns: 1fr;
    }
}

.panel {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    flex-wrap: wrap;
    gap: 8px;
}

.panel-header h3 {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.original-panel .panel-header h3 i {
    color: var(--gray-500);
}

.rewritten-panel .panel-header h3 i {
    color: var(--primary);
}

.rewrite-options {
    display: flex;
    gap: 8px;
    align-items: center;
}

.panel-body {
    padding: 16px;
    max-height: 400px;
    overflow-y: auto;
}

.content-text {
    font-size: 14px;
    line-height: 1.7;
    color: var(--gray-700);
}

.content-text img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
}

.no-content {
    color: var(--gray-400);
    text-align: center;
    padding: 20px;
    font-style: italic;
}

/* ===== Meta Info ===== */
.meta-info {
    margin-bottom: 12px;
    padding: 12px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.meta-row {
    font-size: 13px;
    color: var(--gray-600);
    padding: 4px 0;
    display: flex;
    gap: 4px;
}

.meta-row strong {
    color: var(--gray-700);
    min-width: 80px;
}

/* ===== Save Options ===== */
.save-options {
    display: flex;
    gap: 10px;
    justify-content: center;
    padding-top: 8px;
}

/* ===== Saved Posts ===== */
.saved-posts-list {
    display: grid;
    gap: 12px;
}

.saved-post-item {
    padding: 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    background: var(--gray-50);
    transition: var(--transition);
}

.saved-post-item:hover {
    box-shadow: var(--shadow-md);
}

.saved-post-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    gap: 10px;
}

.saved-post-header h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
}

.status-badge {
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-badge.draft {
    background: var(--warning-light);
    color: var(--warning);
}

.status-badge.published {
    background: var(--success-light);
    color: var(--success);
}

.saved-post-meta {
    display: flex;
    gap: 12px;
    font-size: 12px;
    color: var(--gray-500);
    margin-bottom: 8px;
}

.saved-post-meta i {
    margin-right: 4px;
}

.saved-post-content {
    font-size: 13px;
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: 12px;
}

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

/* ===== Filter Group ===== */
.filter-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ===== Loading Overlay ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    background: white;
    padding: 30px 40px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-spinner p {
    color: var(--gray-600);
    font-size: 14px;
    font-weight: 500;
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    animation: slideIn 0.3s ease;
    max-width: 400px;
}

.toast-success {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success);
}

.toast-error {
    background: var(--danger-light);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.toast-warning {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid var(--warning);
}

.toast-info {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px solid var(--primary);
}

.toast-exit {
    animation: slideOut 0.3s ease forwards;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

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

@keyframes slideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }

    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    padding: 20px;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--gray-200);
    background: var(--gray-50);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-body {
    padding: 20px;
}

.content-section {
    margin-top: 16px;
}

.content-section h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--gray-200);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--gray-400);
}

.empty-state i {
    font-size: 48px;
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 14px;
}

/* ===== Scrollbar ===== */
.post-list::-webkit-scrollbar,
.panel-body::-webkit-scrollbar {
    width: 6px;
}

.post-list::-webkit-scrollbar-track,
.panel-body::-webkit-scrollbar-track {
    background: var(--gray-100);
}

.post-list::-webkit-scrollbar-thumb,
.panel-body::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: 3px;
}

.post-list::-webkit-scrollbar-thumb:hover,
.panel-body::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

/* ===== Settings Form ===== */
.settings-form {
    max-width: 600px;
}

.settings-group {
    margin-bottom: 20px;
}

.settings-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.settings-group label i {
    margin-right: 6px;
    color: var(--primary);
}

.settings-group .url-input {
    width: 100%;
    margin-bottom: 4px;
}

.settings-hint {
    display: block;
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 4px;
}

.settings-hint a {
    color: var(--primary);
}

.settings-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.test-result {
    margin-top: 16px;
    padding: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.test-result.hidden {
    display: none;
}

.test-running {
    color: var(--primary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.test-success {
    color: var(--success);
    font-size: 14px;
    line-height: 1.6;
}

.test-success i {
    font-size: 20px;
    margin-right: 6px;
}

.test-failed {
    color: var(--danger);
    font-size: 14px;
    line-height: 1.6;
}

.test-failed i {
    font-size: 20px;
    margin-right: 6px;
}

.test-details {
    color: var(--gray-600);
    word-break: break-all;
}

.test-hint {
    color: var(--warning);
    font-weight: 500;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .url-input {
        width: 100%;
    }

    .filter-group {
        flex-direction: column;
        align-items: stretch;
    }

    .search-input {
        width: 100%;
    }

    .rewrite-options {
        flex-direction: column;
    }

    .save-options {
        flex-direction: column;
    }

    .save-options .btn {
        width: 100%;
        justify-content: center;
    }

    .step-header {
        flex-direction: column;
        align-items: flex-start;
    }
}