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

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:root {
    --color-brand-primary: #4a90e2;
    --color-brand-primary-dark: #357abd;
    --color-brand-secondary: #f5a623;
    --color-brand-secondary-dark: #f88d1f;

    --color-primary: #4a90e2;
    --color-primary-dark: #357abd;
    --color-primary-light: #6ba3e8;
    --color-accent: #f5a623;
    --color-accent-dark: #f88d1f;

    --color-success: #4caf50;
    --color-success-light: #81c784;
    --color-warning: #ff9800;
    --color-warning-light: #ffb74d;
    --color-error: #f44336;
    --color-error-light: #e57373;
    --color-info: #2196f3;
    --color-info-light: #64b5f6;

    --color-text: #1a1a1a;
    --color-text-secondary: #4a4a4a;
    --color-text-light: #666666;
    --color-text-lighter: #757575;
    --color-text-disabled: #bdbdbd;

    --color-background: #f5f5f5;
    --color-background-elevated: #fafafa;
    --color-surface: #ffffff;
    --color-surface-hover: #f8f8f8;
    --color-border: #e0e0e0;
    --color-border-light: #eeeeee;
    --color-divider: #e0e0e0;

    --color-danger: #f44336;

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

    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;

    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.65;
    --line-height-loose: 1.8;

    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;

    --opacity-disabled: 0.5;
    --opacity-hover: 0.85;
    --opacity-muted: 0.7;

    --color-overlay: rgba(0, 0, 0, 0.5);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);

    --max-width-sm: 480px;
    --max-width-md: 640px;
    --max-width-lg: 800px;
    --max-width-xl: 1200px;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: var(--z-tooltip);
    transition: top var(--transition-fast);
    font-weight: var(--font-weight-medium);
    border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
    top: 0;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

#app {
    min-height: 100vh;
}

.bulletin-board-app {
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: var(--spacing-lg);
}

.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    gap: var(--spacing-md);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.loading p {
    color: var(--color-text-light);
    font-size: var(--font-size-lg);
}

.loading-subtitle {
    font-size: var(--font-size-sm) !important;
    color: var(--color-text-lighter) !important;
}

.loading-progress {
    width: 240px;
    height: 4px;
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 4px;
}

.loading-progress__bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: 2px;
    width: 0%;
    transition: width 0.3s ease;
}

.loading-progress__bar--indeterminate {
    width: 30% !important;
    animation: indeterminate-progress 1.5s ease-in-out infinite;
}

@keyframes indeterminate-progress {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(230%); }
    100% { transform: translateX(-100%); }
}

.loading-progress__text {
    font-size: 12px !important;
    color: var(--color-text-lighter) !important;
    font-variant-numeric: tabular-nums;
}

.error-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    padding: var(--spacing-xl);
    text-align: center;
}

.error-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.error-container h1 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-error);
}

.error-container p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.error-details {
    font-family: monospace;
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
    background: var(--color-background);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    max-width: var(--max-width-md);
}

.retry-button {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.retry-button:hover {
    background: var(--color-primary-dark);
}

.app-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.app-header h1 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.app-stats {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.article-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: none;
    transition: box-shadow var(--transition-base), transform var(--transition-fast);
    cursor: pointer;
    will-change: transform, opacity;
}

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

.article-card--read {
    opacity: var(--opacity-muted);
}

.article-card--favorite {
    border-left: 4px solid var(--color-primary);
}

.article-card--selected {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.article-card__header {
    margin-bottom: var(--spacing-md);
}

.article-card__category {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: white;
    margin-bottom: var(--spacing-sm);
}

.article-card__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.article-card__metadata {
    color: var(--color-text-lighter);
    font-size: var(--font-size-sm);
}

.article-card__content {
    margin-bottom: var(--spacing-md);
}

.article-card__image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

.article-card__hero {
    margin: calc(-1 * var(--spacing-lg)) calc(-1 * var(--spacing-lg)) var(--spacing-md);
    height: 180px;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    position: relative;
}

.article-card__hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--color-background) 25%, var(--color-border) 50%, var(--color-background) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    z-index: 1;
}

.article-card__hero:has(.loaded)::before {
    display: none;
}

.article-card__hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.article-card__hero-img.loaded {
    opacity: 1;
}

.article-card__hero--placeholder {
    height: 60px;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-border) 50%, var(--color-background) 100%);
}

.article-card__description {
    color: var(--color-text-light);
    line-height: var(--line-height-relaxed);
}

.article-card__keywords {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.article-card__keyword {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-background);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.article-card__footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.article-card__action {
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-base);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}

.article-card__action:hover {
    background: var(--color-background);
    border-color: var(--color-primary);
}

.article-card__favorite {
    color: var(--color-warning);
}

.article-card__read-indicator {
    color: var(--color-text-lighter);
}

.article-card__link {
    margin-left: auto;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-fast);
}

.article-card__link:hover {
    color: var(--color-primary-dark);
}

.app-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.app-footer {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.feed-manager-modal,
.search-bar {
    will-change: transform, opacity;
}

@media (max-width: 1024px) {
    .bulletin-board-app {
        padding: var(--spacing-md);
    }

    .suggested-feeds-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .bulletin-board-app {
        padding: var(--spacing-sm);
    }

    .article-card {
        padding: var(--spacing-md);
    }

    .article-card__hero {
        margin: calc(-1 * var(--spacing-md)) calc(-1 * var(--spacing-md)) var(--spacing-sm);
        height: 120px;
    }

    .app-header {
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .app-header h1 {
        font-size: var(--font-size-lg);
    }

    .app-toolbar {
        gap: var(--spacing-xs);
        padding: var(--spacing-md) var(--spacing-sm);
    }

    .toolbar-actions {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xs);
        width: 100%;
    }

    .toolbar-button {
        padding: 12px var(--spacing-md);
        min-height: 44px;
        font-size: var(--font-size-sm);
        white-space: nowrap;
    }

    .date-filter-group {
        display: flex;
        gap: var(--spacing-xs);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding-bottom: var(--spacing-xs);
    }

    .date-filter-group::-webkit-scrollbar {
        display: none;
    }

    .date-filter-pill {
        padding: 10px 16px;
        min-height: 44px;
        font-size: var(--font-size-sm);
        flex-shrink: 0;
    }

    .sort-group {
        display: flex;
        gap: var(--spacing-xs);
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .sort-group::-webkit-scrollbar {
        display: none;
    }

    .sort-group .date-filter-pill {
        padding: 10px 16px;
        min-height: 44px;
        font-size: var(--font-size-sm);
        flex-shrink: 0;
    }

    .search-button {
        min-width: 44px;
        min-height: 44px;
        padding: 10px;
    }

    .search-bar__input {
        min-height: 44px;
    }

    .article-card__actions button {
        min-height: 44px;
        padding: 10px 14px;
    }
}

.search-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: none;
    margin-bottom: var(--spacing-md);
}

.search-bar__input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color var(--transition-fast);
}

.search-bar__input:focus {
    outline: none;
    border-color: var(--color-primary);
}

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

.search-bar__icon {
    color: var(--color-text-lighter);
    font-size: var(--font-size-lg);
}

.search-bar__clear {
    padding: var(--spacing-xs);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-lighter);
    font-size: var(--font-size-lg);
    transition: color var(--transition-fast);
}

.search-bar__clear:hover {
    color: var(--color-error);
}

.search-bar__status-container {
    min-width: 80px;
    text-align: right;
}

.search-bar__status {
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
}

.search-bar__status--searching {
    color: var(--color-primary);
}

.search-bar__status--results {
    color: var(--color-success);
}

.app-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    align-items: center;
}

.toolbar-button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toolbar-button:hover {
    background: var(--color-background);
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.toolbar-button--primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.toolbar-button--primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.toolbar-button--active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.toolbar-button--active:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}

.toolbar-button--secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.toolbar-button--secondary:hover {
    background: var(--color-primary);
    color: white;
}

.toolbar-button--toggle {
    background: var(--color-surface);
    color: var(--color-text-light);
    border: 1px solid var(--color-border);
}

.toolbar-button--toggle:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.toolbar-button--toggle.toolbar-button--active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.toolbar-button--icon-only {
    width: 40px;
    height: 40px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.toolbar-button:disabled,
.toolbar-button[aria-disabled="true"] {
    opacity: var(--opacity-disabled);
    cursor: not-allowed;
    pointer-events: none;
}

.toolbar-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-xs);
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--color-border);
    margin: 0 var(--spacing-xs);
    flex-shrink: 0;
}

.toolbar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.toolbar-icon + span {
    margin-left: var(--spacing-xs);
}

@media (max-width: 768px) {
    .toolbar-button--icon-only {
        width: 44px;
        height: 44px;
    }

    .toolbar-group {
        flex-wrap: wrap;
    }

    .toolbar-separator {
        display: none;
    }
}

.date-filter-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-left: auto;
}

.date-filter-pill {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    background: var(--color-surface);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    cursor: pointer;
    white-space: nowrap;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
}

.date-filter-pill:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.date-filter-pill--active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.date-filter-pill--active:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.feed-manager {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: var(--max-width-md);
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-xl);
    animation: panel-slide-up 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.feed-manager--blurred {
    background: rgba(255, 255, 255, 0.75);
}

body.theme-dark .feed-manager--blurred {
    background: rgba(30, 30, 30, 0.75);
}

@keyframes panel-slide-up {
    from { opacity: 0; transform: translateY(24px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.feed-manager__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.feed-manager__title {
    font-size: var(--font-size-xl);
    margin: 0;
}

.feed-manager__close {
    padding: var(--spacing-xs);
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--color-text-lighter);
    transition: color var(--transition-fast);
}

.feed-manager__close:hover {
    color: var(--color-error);
}

.feed-manager__content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg);
}

.feed-manager__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    overflow-y: auto;
    flex: 1;
}

.feed-manager__empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-light);
}

.feed-manager__error {
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-danger);
    font-size: var(--font-size-sm);
}

.feed-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-background);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-success);
}

.feed-item--disabled {
    opacity: var(--opacity-disabled);
    border-left-color: var(--color-text-lighter);
}

.feed-item--error {
    border-left-color: var(--color-error);
}

.feed-item__info {
    flex: 1;
}

.feed-item__title {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-lg);
}

.feed-item__url {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-lighter);
}

.feed-item__stats {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.feed-item__actions {
    display: flex;
    gap: var(--spacing-sm);
}

.feed-item__action {
    padding: var(--spacing-sm);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
}

.feed-item__action:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
}

.feed-item__action--danger:hover {
    border-color: var(--color-error);
    color: var(--color-error);
}

.feed-form {
    display: flex;
    flex-direction: row;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
}

.feed-form label {
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-xs);
}

.feed-form input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: border-color var(--transition-fast);
}

.feed-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.feed-form__submit {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: background var(--transition-fast);
    white-space: nowrap;
}

.feed-form__submit:hover {
    background: var(--color-primary-dark);
}

.feed-manager__footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

.feed-manager__add,
.feed-manager__cancel {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.feed-manager__add {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.feed-manager__add:hover {
    background: var(--color-primary-dark);
}

.feed-manager__cancel {
    background: var(--color-surface);
}

.feed-manager__cancel:hover {
    background: var(--color-background);
}

.feed-manager__opml {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg) var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--color-success);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    z-index: var(--z-tooltip);
    animation: slideInRight var(--transition-base);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.toast--error {
    background: var(--color-error);
}

.toast--warning {
    background: var(--color-warning);
}

.toast__message {
    flex: 1;
}

.toast__close {
    padding: var(--spacing-xs);
    background: none;
    border: none;
    color: white;
    font-size: var(--font-size-lg);
    cursor: pointer;
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.toast__close:hover {
    opacity: 1;
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.loading-spinner--centered {
    justify-content: center;
    padding: var(--spacing-lg);
}

.loading-spinner__element {
    position: relative;
}

.loading-spinner__bar {
    position: absolute;
    width: 3px;
    height: 8px;
    background: var(--color-text-lighter);
    border-radius: 2px;
    opacity: 0.3;
    animation: spinner-fade 1s linear infinite;
}

.loading-spinner__bar[data-bar="1"] { transform: rotate(0deg) translateY(-12px); animation-delay: -0.875s; }
.loading-spinner__bar[data-bar="2"] { transform: rotate(45deg) translateY(-12px); animation-delay: -0.75s; }
.loading-spinner__bar[data-bar="3"] { transform: rotate(90deg) translateY(-12px); animation-delay: -0.625s; }
.loading-spinner__bar[data-bar="4"] { transform: rotate(135deg) translateY(-12px); animation-delay: -0.5s; }
.loading-spinner__bar[data-bar="5"] { transform: rotate(180deg) translateY(-12px); animation-delay: -0.375s; }
.loading-spinner__bar[data-bar="6"] { transform: rotate(225deg) translateY(-12px); animation-delay: -0.25s; }
.loading-spinner__bar[data-bar="7"] { transform: rotate(270deg) translateY(-12px); animation-delay: -0.125s; }
.loading-spinner__bar[data-bar="8"] { transform: rotate(315deg) translateY(-12px); animation-delay: 0s; }

@keyframes spinner-fade {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.loading-spinner--small .loading-spinner__bar { width: 2px; height: 5px; }
.loading-spinner--small .loading-spinner__bar[data-bar="1"] { transform: rotate(0deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="2"] { transform: rotate(45deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="3"] { transform: rotate(90deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="4"] { transform: rotate(135deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="5"] { transform: rotate(180deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="6"] { transform: rotate(225deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="7"] { transform: rotate(270deg) translateY(-7px); }
.loading-spinner--small .loading-spinner__bar[data-bar="8"] { transform: rotate(315deg) translateY(-7px); }

.loading-spinner--primary .loading-spinner__bar { background: var(--color-primary); }
.loading-spinner--light .loading-spinner__bar { background: white; }

.loading-spinner__message {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.error-message {
    padding: var(--spacing-md);
    background: var(--color-error);
    color: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.error-message__text {
    flex: 1;
}

.error-message__dismiss {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: var(--font-size-lg);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.error-message__dismiss:hover {
    opacity: 1;
}

.error-message--warning {
    background: var(--color-warning);
}

.error-message--info {
    background: var(--color-info);
}

.error-message__icon {
    flex-shrink: 0;
    margin-right: var(--spacing-sm);
}

.error-message__content {
    flex: 1;
}

.error-message__title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
}

.error-message__message {
    font-size: var(--font-size-sm);
    opacity: 0.95;
}

.error-message__details {
    font-size: var(--font-size-xs);
    opacity: 0.8;
    margin-top: var(--spacing-xs);
    font-family: monospace;
}

.error-message__actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
    margin-left: var(--spacing-sm);
}

.error-message__action {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: background var(--transition-fast);
}

.error-message__action:hover {
    background: rgba(255, 255, 255, 0.3);
}

.error-message__retry {
    font-weight: var(--font-weight-medium);
}

.card-expansion-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-overlay);
    z-index: 10000;
    will-change: opacity;
}

.card-expansion-clone {
    position: fixed;
    z-index: 10001;
    will-change: transform;
    overflow: hidden;
    background: var(--color-surface);
}

#article-detail-backdrop {
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    overflow: visible !important;
}

#article-detail-backdrop > div:last-child {
    position: absolute !important;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow-y: auto;
}

.article-detail-overlay {
    position: relative;
    min-height: 100%;
    z-index: 1000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    -webkit-overflow-scrolling: touch;
    padding: var(--spacing-lg) var(--spacing-md);
    animation: overlay-fade-in 250ms ease;
}

@keyframes overlay-fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

.article-detail {
    position: relative;
    max-width: var(--max-width-lg);
    width: 100%;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
    animation: detail-slide-up 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes detail-slide-up {
    from { opacity: 0; transform: translateY(24px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.article-detail__close-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--color-overlay);
    color: white;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: background var(--transition-fast);
}

.article-detail__close-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

.article-detail__hero {
    width: 100%;
    max-height: 300px;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    position: relative;
}

.article-detail__hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--color-background) 25%, var(--color-border) 50%, var(--color-background) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s ease-in-out infinite;
    z-index: 1;
}

.article-detail__hero:has(.loaded)::before {
    display: none;
}

.article-detail__hero-img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.article-detail__hero-img.loaded {
    opacity: 1;
}

.article-detail__hero--placeholder {
    height: 120px;
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-border) 50%, var(--color-background) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-detail__header {
    padding: var(--spacing-lg);
    padding-bottom: 0;
}

.article-detail__category {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 12px;
    color: white;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.article-detail__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.article-detail__metadata {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.article-detail__body {
    padding: var(--spacing-lg);
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-text);
    max-width: 70ch;
}

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

.article-detail__keywords {
    padding: 0 var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.article-detail__keyword {
    display: inline-block;
    padding: 2px 10px;
    background: var(--color-background);
    border-radius: 12px;
    font-size: 12px;
    color: var(--color-text-light);
}

.article-detail__footer {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.article-detail__action {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}

.article-detail__action:hover {
    background: var(--color-background);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.article-detail__action--primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    margin-left: auto;
}

.article-detail__action--primary:hover {
    background: var(--color-primary-dark);
    color: white;
}

@media (max-width: 600px) {
    .article-detail-overlay {
        padding: 0;
    }

    .article-detail {
        border-radius: 0;
        margin: 0;
        min-height: 100vh;
        max-width: 100%;
    }

    .article-detail__hero {
        border-radius: 0;
        max-height: 40vh;
    }

    .article-detail__title {
        font-size: var(--font-size-lg);
    }

    .article-detail__body {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }

    .article-detail__footer {
        flex-wrap: wrap;
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
    }

    .article-detail__action {
        flex: 1 1 calc(50% - var(--spacing-xs));
        min-height: 44px;
        justify-content: center;
        padding: 12px var(--spacing-sm);
    }

    .article-detail__action--primary {
        flex: 1 1 100%;
        margin-left: 0;
    }

    .article-detail__close {
        width: 44px;
        height: 44px;
        top: var(--spacing-sm);
        right: var(--spacing-sm);
    }
}

.category-filter-bar {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-sm);
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.category-filter-bar::-webkit-scrollbar {
    height: 4px;
}

.category-filter-bar::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.category-pill {
    border-radius: 16px;
    padding: 4px 12px;
    font-size: 0.8rem;
    border: 2px solid;
    cursor: pointer;
    white-space: nowrap;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    line-height: 1.4;
    font-family: inherit;
}

.category-pill:hover {
    transform: translateY(-1px);
    box-shadow: none;
}

.category-pill--active {
    color: white;
}

.category-pill--inactive {
    background: transparent;
}

.category-pill--all-active {
    background-color: var(--color-text);
    border-color: var(--color-text);
    color: var(--color-surface);
}

.article-card__badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xs);
}

.article-card__category {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.article-card__category:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

.article-detail__badges {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
}

.article-detail__category {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.article-detail__category:hover {
    opacity: 0.85;
    transform: scale(1.05);
}

.sentiment-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.75rem;
    padding: 2px var(--spacing-sm);
    border-radius: 8px;
    font-weight: var(--font-weight-medium);
    line-height: 1.4;
}

.sentiment-indicator::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sentiment--positive::before {
    background-color: #059669;
}

.sentiment--positive {
    background-color: rgba(16, 185, 129, 0.15);
    color: #059669;
}

.sentiment--neutral {
    background-color: rgba(107, 114, 128, 0.15);
    color: #6b7280;
}

.sentiment--neutral::before {
    background-color: #6b7280;
}

.sentiment--negative {
    background-color: rgba(239, 68, 68, 0.15);
    color: #dc2626;
}

.sentiment--negative::before {
    background-color: #dc2626;
}

.related-articles {
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg) 0;
}

.related-articles__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
}

.related-article-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.related-article-item:hover {
    background-color: rgba(0, 0, 0, 0.04);
}

.related-article-item__title {
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.related-article-item__category {
    display: inline-block;
    font-size: 0.65rem;
    padding: 1px 6px;
    border-radius: 4px;
    color: white;
    white-space: nowrap;
}

.article-card--tinted {
    box-shadow: none;
}

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

.article-card--tinted .article-card__keyword {
    background: rgba(0, 0, 0, 0.06);
}

.sort-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.sort-group__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    margin-right: var(--spacing-xs);
}

.settings-panel {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: var(--max-width-sm);
    width: 90%;
    box-shadow: var(--shadow-xl);
    animation: panel-slide-up 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

.settings-panel--blurred {
    background: rgba(255, 255, 255, 0.75);
}

body.theme-dark .settings-panel--blurred {
    background: rgba(30, 30, 30, 0.75);
}

.settings-panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.settings-panel__title {
    font-size: var(--font-size-xl);
    margin: 0;
}

.settings-panel__section {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.settings-panel__section:last-child {
    border-bottom: none;
}

.settings-panel__section-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.settings-panel__pills {
    display: flex;
    gap: var(--spacing-xs);
}

.settings-panel__info {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.settings-panel__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.feed-item__edit-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    width: 100%;
}

.feed-item__edit-input {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
}

.feed-item__edit-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.feed-item__edit-save {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.feed-item__edit-cancel {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
}

.feed-item__frequency {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    width: 100%;
}

.feed-item__frequency-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-xs);
    color: var(--color-text-lighter);
    white-space: nowrap;
}

.feed-item__frequency-select {
    flex: 1;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    min-height: 32px;
}

.feed-item__frequency-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xs) var(--spacing-lg);
}

.shortcut-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
}

.shortcut-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 28px;
    height: 24px;
    padding: 0 var(--spacing-xs);
    background: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.shortcut-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

body.theme-dark {
    --color-brand-primary: #6ba3e8;
    --color-brand-primary-dark: #4a90e2;
    --color-brand-secondary: #ffd666;
    --color-brand-secondary-dark: #f5a623;

    --color-primary: #6ba3e8;
    --color-primary-dark: #4a90e2;
    --color-primary-light: #8ab4f8;
    --color-accent: #ffd666;
    --color-accent-dark: #f5a623;

    --color-success: #81c995;
    --color-success-light: #a5d6a7;
    --color-warning: #ffb74d;
    --color-warning-light: #ffcc80;
    --color-error: #f28b82;
    --color-error-light: #ef9a9a;
    --color-danger: #f28b82;
    --color-info: #64b5f6;
    --color-info-light: #90caf9;

    --color-text: #e8e8e8;
    --color-text-secondary: #b8b8b8;
    --color-text-light: #999999;
    --color-text-lighter: #8a8a8a;
    --color-text-disabled: #4a4a4a;

    --color-background: #121212;
    --color-background-elevated: #1e1e1e;
    --color-surface: #1e1e1e;
    --color-surface-hover: #2a2a2a;
    --color-border: #333333;
    --color-border-light: #2a2a2a;
    --color-divider: #333333;
}

body.theme-dark .article-card--tinted {
    box-shadow: var(--shadow-sm);
}

body.theme-dark .article-detail {
    background: var(--color-surface);
}

body.theme-dark .category-column {
    background: rgba(40, 40, 40, 0.5);
}

body.theme-dark .grid-card--tinted {
    background: rgba(40, 40, 40, 0.6);
}

body.theme-dark .sentiment--positive {
    background-color: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

body.theme-dark .sentiment--positive::before {
    background-color: #6ee7b7;
}

body.theme-dark .sentiment--neutral {
    background-color: rgba(107, 114, 128, 0.2);
    color: #9ca3af;
}

body.theme-dark .sentiment--neutral::before {
    background-color: #9ca3af;
}

body.theme-dark .sentiment--negative {
    background-color: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

body.theme-dark .sentiment--negative::before {
    background-color: #fca5a5;
}

body.theme-dark .article-card__hero--placeholder {
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-border) 50%, var(--color-background) 100%);
}

body.theme-dark .article-detail__hero--placeholder {
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-border) 50%, var(--color-background) 100%);
}

body.theme-dark .related-articles {
    border-top-color: var(--color-border);
}

body.theme-dark .related-article-item {
    border-color: var(--color-border);
}

body.theme-dark .related-article-item:hover {
    background: var(--color-surface-hover);
}

body.theme-dark .category-column__header {
    background: var(--color-background);
    border-bottom-color: var(--color-border);
}

@media (max-width: 768px) {
    .app-toolbar {
        gap: var(--spacing-sm);
    }

    .date-filter-group,
    .sort-group {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .settings-panel {
        width: 95%;
        max-width: none;
    }

    .settings-section {
        padding: var(--spacing-md);
    }
}

.article-list__spacer {
    flex-shrink: 0;
}

.article-list--virtual {
    display: flex;
    flex-direction: column;
}

.lazy-image {
    opacity: 0;
    transition: opacity 0.3s ease;
    background: var(--color-background);
    min-height: 60px;
}

.lazy-image--loaded {
    opacity: 1;
}

.discover-section {
    padding: 0 16px 16px;
}

.discovered-feeds-list {
    background: var(--color-surface-hover);
    border-radius: var(--radius-md, 8px);
    padding: 12px;
    margin-top: 8px;
}

.discovered-feed-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border, #e0e0e0);
}

.discovered-feed-item:last-of-type {
    border-bottom: none;
}

.discovered-feed-item__title {
    font-size: var(--font-size-sm, 0.875rem);
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 8px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-md);
    padding: var(--spacing-md);
}

.category-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 80vh;
    overflow-y: auto;
    border-radius: var(--radius-lg, 12px);
    background: var(--color-surface-hover);
    padding: 0 var(--spacing-sm) var(--spacing-sm);
}

.category-column__header {
    position: sticky;
    top: 0;
    background: var(--color-surface);
    padding: 12px 8px 8px;
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 2px solid var(--color-accent, #4a90d9);
    z-index: 1;
}

.category-column__name {
    font-size: var(--font-size-base, 1rem);
}

.category-column__count {
    font-size: var(--font-size-xs, 0.75rem);
    color: #fff;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: var(--font-weight-bold);
}

.grid-card {
    padding: var(--spacing-md);
    border-radius: var(--radius-md, 8px);
    cursor: pointer;
    transition: var(--transition-fast, 0.15s ease);
}

.grid-card:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.grid-card--tinted {
    background: rgba(255, 255, 255, 0.4);
}

.grid-card--read {
    opacity: var(--opacity-muted);
}

.grid-card--favorite {
    border-left: 3px solid var(--color-warning, #f0ad4e);
}

.grid-card--selected {
    outline: 2px solid var(--color-accent, #4a90d9);
}

.grid-card__title {
    font-size: var(--font-size-sm, 0.875rem);
    font-weight: var(--font-weight-semibold);
    margin: 0 0 6px 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.grid-card__description {
    font-size: var(--font-size-xs, 0.75rem);
    color: var(--color-text-secondary, #666);
    margin: 0 0 6px 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.grid-card__keywords {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 6px;
}

.grid-card__keyword {
    font-size: 0.65rem;
    background: var(--color-background);
    padding: 1px 6px;
    border-radius: 4px;
}

.grid-card__meta {
    font-size: 0.65rem;
    color: var(--color-text-lighter);
    margin-bottom: 4px;
}

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

.grid-card__action {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    padding: 2px;
}

.grid-card__read-indicator {
    font-size: 0.75rem;
    color: var(--color-text-lighter);
}

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

    .category-column {
        max-height: none;
    }
}

.feed-preview {
    margin: 12px 16px;
    padding: 12px;
    border-radius: var(--radius-md, 8px);
    font-size: var(--font-size-sm, 0.875rem);
}

.feed-preview--loading {
    background: rgba(66, 133, 244, 0.1);
    color: var(--color-accent, #4a90d9);
    border: 1px solid rgba(66, 133, 244, 0.3);
}

.feed-preview--success {
    background: rgba(76, 175, 80, 0.1);
    color: #2e7d32;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.feed-preview--error {
    background: rgba(244, 67, 54, 0.1);
    color: #c62828;
    border: 1px solid rgba(244, 67, 54, 0.3);
}

.feed-preview__title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: 8px;
}

.feed-preview__subtitle {
    font-size: var(--font-size-xs, 0.75rem);
    opacity: 0.8;
    margin-bottom: 6px;
}

.feed-preview__article {
    font-size: var(--font-size-xs, 0.75rem);
    margin-left: 8px;
    margin-bottom: 3px;
    opacity: 0.9;
}

body.theme-dark .feed-preview--success {
    background: rgba(76, 175, 80, 0.15);
    color: #81c784;
    border-color: rgba(76, 175, 80, 0.4);
}

body.theme-dark .feed-preview--error {
    background: rgba(244, 67, 54, 0.15);
    color: #e57373;
    border-color: rgba(244, 67, 54, 0.4);
}

body.theme-dark .feed-preview--loading {
    background: rgba(66, 133, 244, 0.15);
    color: #64b5f6;
    border-color: rgba(66, 133, 244, 0.4);
}

.app-empty {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    text-align: center;
}

.empty-state__header h2 {
    font-size: 2rem;
    margin: 0 0 12px 0;
    color: var(--color-text, #333);
}

.empty-state__header p {
    font-size: 1.125rem;
    color: var(--color-text-secondary, #666);
    margin: 0 0 32px 0;
}

.empty-state__cta {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: var(--radius-md, 8px);
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast, 0.15s ease);
}

.empty-state__cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.empty-state__divider {
    margin: 48px 0 32px 0;
    color: var(--color-text-lighter);
    font-size: 0.875rem;
    position: relative;
}

.empty-state__divider::before,
.empty-state__divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 35%;
    height: 1px;
    background: var(--color-border, #e0e0e0);
}

.empty-state__divider::before {
    left: 0;
}

.empty-state__divider::after {
    right: 0;
}

.suggested-feeds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 40px;
    padding: 24px;
    margin-top: 24px;
}

.suggested-feed-card {
    background: var(--color-surface-hover);
    border: 1px solid var(--color-border, #e0e0e0);
    border-radius: var(--radius-md, 8px);
    padding: 16px;
    text-align: left;
    transition: var(--transition-fast, 0.15s ease);
}

.suggested-feed-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}

.suggested-feed-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.suggested-feed-card__name {
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    color: var(--color-text, #333);
}

.suggested-feed-card__category {
    font-size: 0.75rem;
    background: var(--color-primary);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
}

.suggested-feed-card__description {
    font-size: 0.875rem;
    color: var(--color-text-secondary, #666);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.suggested-feed-card__button {
    width: 100%;
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: var(--radius-sm, 6px);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-fast, 0.15s ease);
    min-height: 44px;
}

.suggested-feed-card__button:hover {
    background: var(--color-primary-dark);
}

body.theme-dark .app-empty {
    color: var(--color-text, #e0e0e0);
}

body.theme-dark .empty-state__header h2 {
    color: var(--color-text, #e0e0e0);
}

body.theme-dark .suggested-feed-card {
    background: rgba(40, 40, 40, 0.6);
    border-color: rgba(255, 255, 255, 0.1);
}

body.theme-dark .suggested-feed-card:hover {
    border-color: var(--color-primary);
}

body.theme-dark .suggested-feed-card__name {
    color: var(--color-text, #e0e0e0);
}

@media (max-width: 768px) {
    .suggested-feeds-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 20px 16px;
    }

    .empty-state__header h2 {
        font-size: 1.5rem;
    }
}

.offline-indicator {
    background: rgba(255, 152, 0, 0.15);
    color: #f57c00;
    border: 1px solid rgba(255, 152, 0, 0.3);
    padding: 6px 12px;
    border-radius: var(--radius-sm, 6px);
    font-size: var(--font-size-sm, 0.875rem);
    font-weight: var(--font-weight-semibold);
    display: inline-block;
    margin-top: 8px;
}

body.theme-dark .offline-indicator {
    background: rgba(255, 152, 0, 0.2);
    color: #ffb74d;
    border-color: rgba(255, 152, 0, 0.4);
}

.search-match-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.search-match-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: var(--font-weight-medium);
    background: rgba(66, 133, 244, 0.1);
    color: #1967d2;
    border: 1px solid rgba(66, 133, 244, 0.2);
}

.search-match-badge--title {
    background: rgba(52, 168, 83, 0.1);
    color: #188038;
    border-color: rgba(52, 168, 83, 0.2);
}

.search-match-badge--description {
    background: rgba(251, 188, 5, 0.1);
    color: #f29900;
    border-color: rgba(251, 188, 5, 0.2);
}

.search-match-badge--content {
    background: rgba(217, 48, 37, 0.1);
    color: #c5221f;
    border-color: rgba(217, 48, 37, 0.2);
}

.search-match-badge--keywords {
    background: rgba(142, 68, 173, 0.1);
    color: #7b1fa2;
    border-color: rgba(142, 68, 173, 0.2);
}

.search-match-score {
    font-size: 10px;
    opacity: 0.8;
    margin-left: 2px;
}

body.theme-dark .search-match-badge {
    background: rgba(66, 133, 244, 0.15);
    color: #8ab4f8;
    border-color: rgba(66, 133, 244, 0.3);
}

body.theme-dark .search-match-badge--title {
    background: rgba(52, 168, 83, 0.15);
    color: #81c995;
    border-color: rgba(52, 168, 83, 0.3);
}

body.theme-dark .search-match-badge--description {
    background: rgba(251, 188, 5, 0.15);
    color: #fdd663;
    border-color: rgba(251, 188, 5, 0.3);
}

body.theme-dark .search-match-badge--content {
    background: rgba(217, 48, 37, 0.15);
    color: #f28b82;
    border-color: rgba(217, 48, 37, 0.3);
}

body.theme-dark .search-match-badge--keywords {
    background: rgba(142, 68, 173, 0.15);
    color: #c58af9;
    border-color: rgba(142, 68, 173, 0.3);
}

.app-header__title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.app-header__logo {
    display: inline-block;
    vertical-align: middle;
    transition: transform var(--transition-base);
}

.app-header__logo:hover {
    transform: scale(1.05) rotate(2deg);
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.toolbar-icon svg {
    display: block;
}

@media print {
    .app-toolbar,
    .search-bar,
    .category-filter-bar,
    .feed-manager-modal,
    .toast,
    .modal-overlay,
    .skip-link {
        display: none !important;
    }

    .article-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }

    .article-detail {
        max-width: 100%;
        box-shadow: none;
    }

    body {
        background: white;
        color: black;
    }
}