* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-surface-elevated: rgba(255, 255, 255, 0.95);
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-text-tertiary: #b0b0b5;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(0, 0, 0, 0.12);
    --color-accent-internal: #007aff;
    --color-accent-external: #5856d6;
    --color-success: #34c759;
    --color-warning: #ff9500;
    --color-destructive: #ff3b30;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04), 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.06), 0 12px 32px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.08), 0 24px 64px rgba(0, 0, 0, 0.06);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', system-ui, sans-serif;
    background: var(--color-bg);
    color: var(--color-text-primary);
    line-height: 1.5;
    overflow-x: hidden;
}

.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 32px 40px 80px;
}

/* Header */
.header {
    margin-bottom: 40px;
    animation: fadeInDown 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.header-title {
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--color-text-primary);
    line-height: 1.1;
}

.header-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    border: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    letter-spacing: -0.01em;
}

.btn-primary-large {
    padding: 15px 30px;
    font-size: 17px;
    gap: 10px;
}

.btn-primary-large i {
    font-size: 18px;
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: #f5f5f7;
    border-color: var(--color-border-hover);
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--color-accent-internal);
    color: white;
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.25);
}

.btn-primary:hover {
    background: #0051d5;
    box-shadow: 0 4px 16px rgba(0, 122, 255, 0.35);
    transform: translateY(-1px);
}

.btn-primary:active,
.btn-secondary:active {
    transform: scale(0.97);
}

.header-subtitle {
    font-size: 17px;
    color: var(--color-text-secondary);
    font-weight: 400;
    letter-spacing: -0.01em;
}

/* Toggle Card */
.toggle-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s backwards;
}

.toggle-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
}

.toggle-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    padding: 12px 24px;
    border-radius: var(--radius-md);
}

.toggle-option:hover {
    background: rgba(0, 0, 0, 0.02);
}

.toggle-option-label {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
    letter-spacing: -0.02em;
}

.toggle-option-count {
    font-size: 13px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.toggle-option.active .toggle-option-label {
    color: var(--color-text-primary);
}

.toggle-option.active .toggle-option-count {
    color: var(--color-text-secondary);
}

/* Toggle Switch */
.toggle-switch-wrapper {
    position: relative;
}

.toggle-switch {
    width: 68px;
    height: 34px;
    background: rgba(120, 120, 128, 0.16);
    border-radius: 17px;
    position: relative;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.toggle-switch-slider {
    width: 30px;
    height: 30px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
}

.toggle-switch.internal {
    background: var(--color-accent-internal);
}

.toggle-switch.external {
    background: var(--color-accent-external);
}

.toggle-switch.external .toggle-switch-slider {
    transform: translateX(34px);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s backwards;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.04em;
    line-height: 1;
}

/* Main Content Card */
.content-card {
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s backwards;
}

.content-header {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 28px 32px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.content-title-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.content-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

.type-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.type-badge.internal {
    background: rgba(0, 122, 255, 0.1);
    color: var(--color-accent-internal);
}

.type-badge.external {
    background: rgba(88, 86, 214, 0.1);
    color: var(--color-accent-external);
}

.content-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.search-box {
    position: relative;
}

.search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    font-size: 40px;
    pointer-events: none;
}

.search-input {
    padding: 10px 16px 10px 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 15px;
    background: var(--color-surface);
    color: var(--color-text-primary);
    width: 260px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent-internal);
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.08);
}

.search-input::placeholder {
    color: var(--color-text-tertiary);
}

/* Article Cards List */
.articles-list {
    display: grid;
    gap: 16px;
}

/* Article Card - Collapsed State */
.article-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.article-collapsed {
    display: grid;
    grid-template-columns: auto 1fr auto auto auto;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.article-collapsed:hover {
    background: rgba(0, 0, 0, 0.01);
}

.article-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--color-accent-internal);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.2);
    transition: all 0.3s ease;
}

.article-card:hover .article-icon {
    transform: scale(1.05);
}

.article-summary {
    flex: 1;
    min-width: 0;
}

.article-title-collapsed {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 6px;
    letter-spacing: -0.01em;
}

.article-meta-collapsed {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.meta-item-collapsed {
    display: flex;
    align-items: center;
    gap: 6px;
}

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
}

.url-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-accent-internal);
    text-decoration: none;
    font-weight: 500;
    font-size: 13px;
    transition: all 0.2s ease;
}

.url-link:hover {
    opacity: 0.7;
}

/* Quick Stats */
.quick-stats {
    display: flex;
    gap: 16px;
}

.quick-stat {
    text-align: center;
}

.quick-stat-value {
    font-size: 24px;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.quick-stat-label {
    font-size: 11px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.quick-stat.promoted .quick-stat-value {
    color: #1d1d1f;
}

.quick-stat.views .quick-stat-value {
    color: #0051d5;
}

.quick-stat.engagement .quick-stat-value {
    color: #007aff;
}

/* Mini Progress */
.mini-progress {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 120px;
}

.mini-progress-bar {
    flex: 1;
    height: 6px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 3px;
    overflow: hidden;
}

.mini-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-internal), #00d4ff);
    border-radius: 3px;
    transition: width 0.5s ease;
}

.mini-progress-text {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    min-width: 40px;
}

/* Expand Icon */
.expand-icon {
    color: var(--color-text-tertiary);
    font-size: 14px;
    transition: all 0.3s ease;
}

.article-card.expanded .expand-icon {
    transform: rotate(180deg);
}

.view-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(0, 122, 255, 0.08);
    color: var(--color-accent-internal);
    border: 1px solid rgba(0, 122, 255, 0.2);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    width: fit-content;
    white-space: nowrap;
}

.view-more-btn:hover {
    background: rgba(0, 122, 255, 0.12);
    border-color: rgba(0, 122, 255, 0.3);
}

.view-more-btn i {
    font-size: 11px;
    transition: all 0.3s ease;
}

.article-card.expanded .view-more-btn i {
    transform: rotate(180deg);
}

.view-more-btn span.btn-text-collapsed {
    display: inline;
}

.view-more-btn span.btn-text-expanded {
    display: none;
}

.article-card.expanded .view-more-btn span.btn-text-collapsed {
    display: none;
}

.article-card.expanded .view-more-btn span.btn-text-expanded {
    display: inline;
}

/* Expanded State */
.article-expanded {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border-top: 1px solid transparent;
}

.article-card.expanded .article-expanded {
    max-height: 1000px;
    border-top: 1px solid var(--color-border);
}

.article-header {
    padding: 24px;
    background: rgba(0, 0, 0, 0.01);
}

.article-header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.article-header-content {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-view-promotion {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-accent-internal);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.btn-view-promotion:hover {
    background: #0051d5;
    transform: translateY(-1px);
}

.auto-renew-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.auto-renew-toggle .toggle-switch {
    width: 46px;
    height: 26px;
    background: rgba(120, 120, 128, 0.16);
    border-radius: 13px;
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.auto-renew-toggle .toggle-switch-slider {
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.auto-renew-toggle .toggle-switch.active {
    background: var(--color-success);
}

.auto-renew-toggle .toggle-switch.active .toggle-switch-slider {
    transform: translateX(20px);
}

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

.btn-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--color-text-secondary);
}

.btn-icon:hover {
    background: rgba(0, 0, 0, 0.05);
}

.btn-icon.delete {
    color: var(--color-destructive);
}

.btn-icon.delete:hover {
    background: rgba(255, 59, 48, 0.1);
}

/* Promotion Stats Grid */
.promotion-stats {
    padding: 0 24px 24px;
}

.stats-grid-expanded {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card-expanded {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 16px;
    transition: all 0.2s ease;
}

.stat-card-expanded:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-sm);
}

.stat-label-expanded {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.stat-value-wrapper {
    margin-bottom: 8px;
}

.stat-value-expanded {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    line-height: 1;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.status-badge.promoted {
    background: rgba(255, 149, 0, 0.12);
    color: var(--color-warning);
}

.status-badge.active {
    background: rgba(52, 199, 89, 0.12);
    color: var(--color-success);
}

.status-badge.trending {
    background: rgba(0, 122, 255, 0.12);
    color: var(--color-accent-internal);
}

/* Progress Section */
.progress-section {
    background: rgba(0, 0, 0, 0.02);
    border-radius: var(--radius-md);
    padding: 16px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.progress-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.progress-percentage {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-accent-internal);
}

.progress-bar-wrapper {
    height: 8px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-accent-internal), #00d4ff);
    border-radius: 4px;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--color-text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
}

.empty-icon {
    font-size: 72px;
    margin-bottom: 24px;
    opacity: 0.3;
}

.empty-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.empty-description {
    font-size: 17px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Smooth transitions for view changes */
.content-card.transitioning {
    opacity: 0;
    transform: translateY(10px);
}

/* Responsive */
@media (max-width: 1200px) {
    .container {
        padding: 24px;
    }

    .article-collapsed {
        grid-template-columns: auto 1fr;
        gap: 16px;
    }

    .quick-stats,
    .mini-progress {
        grid-column: 1 / -1;
        margin-top: 12px;
    }

    .expand-icon {
        position: absolute;
        right: 24px;
        top: 24px;
    }
}

@media (max-width: 768px) {
    .header-title {
        font-size: 36px;
    }

    .header-top {
        flex-direction: column;
        gap: 16px;
    }

    .toggle-section {
        flex-direction: column;
        gap: 20px;
    }

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

    .search-input {
        width: 100%;
    }

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

    .article-collapsed {
        grid-template-columns: 1fr;
    }

    .article-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    .quick-stats {
        display: none;
    }
}

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

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}