:root {
    --bg: #ffffff;
    --bg-secondary: #f8f8f8;
    --text: #1a1a1a;
    --text-secondary: #666;
    --border: #e0e0e0;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --warn: #f59e0b;
    --warn-bg: #fffbeb;
    --success: #10b981;
    --card-bg: #ffffff;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.08);
    --menu-bg: #ffffff;
    --menu-shadow: 0 4px 12px rgba(0,0,0,0.15);
    --code-bg: #f1f5f9;
    --max-width: 720px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #111827;
        --bg-secondary: #1f2937;
        --text: #f3f4f6;
        --text-secondary: #9ca3af;
        --border: #374151;
        --primary: #60a5fa;
        --primary-hover: #93bbfd;
        --danger: #f87171;
        --danger-hover: #ef4444;
        --warn: #fbbf24;
        --warn-bg: #451a03;
        --card-bg: #1f2937;
        --card-shadow: 0 1px 3px rgba(0,0,0,0.3);
        --menu-bg: #1f2937;
        --menu-shadow: 0 4px 12px rgba(0,0,0,0.4);
        --code-bg: #1e293b;
    }
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.top-nav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 48px;
    gap: 16px;
}

.brand {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.875rem;
    white-space: nowrap;
}

.nav-links a:hover {
    background: var(--border);
    color: var(--text);
}

.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 24px 20px 80px;
}

/* Auth pages */
.auth-page {
    display: flex;
    justify-content: center;
    padding-top: 80px;
}

.auth-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 400px;
}

.auth-card h1 {
    margin-bottom: 8px;
    font-size: 1.5rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 20px;
}

.auth-form label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.auth-form input {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    font-family: var(--font-sans);
}

.auth-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
}
.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--bg-secondary);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
}
.btn-secondary:hover {
    background: var(--border);
}

.btn-sm {
    padding: 4px 12px;
    font-size: 0.8rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-sans);
}
.btn-sm:hover {
    background: var(--border);
    color: var(--text);
}

.btn-danger {
    color: var(--danger);
    border-color: var(--danger);
}
.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

/* Inbox */
.inbox-header {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin-bottom: 20px;
}

.inbox-header h1 {
    font-size: 1.5rem;
}

.count {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.article-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.article-card {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 14px 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    gap: 12px;
}

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

.article-title {
    display: block;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text);
    text-decoration: none;
    margin-bottom: 4px;
    word-break: break-word;
}

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

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.article-meta span + span::before {
    content: "·";
    margin-right: 8px;
}

.article-card-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

/* Batch selection */
.batch-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.select-all-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.article-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
    flex-shrink: 0;
}

.select-all-label .article-checkbox {
    margin: 0;
}

.article-checkbox-wrap {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    padding: 2px;
}

.selected-count {
    font-size: 0.8rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.badge {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.75rem;
}

.badge-warn {
    background: var(--warn-bg);
    color: var(--warn);
}

.pagination {
    display: flex;
    gap: 8px;
    margin-top: 20px;
    justify-content: center;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state p {
    margin-bottom: 16px;
}

/* Reading view */
.reading-view {
    max-width: 680px;
    margin: 0 auto;
}

.reading-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
}
.back-link:hover {
    color: var(--primary);
}

.reading-actions {
    display: flex;
    gap: 4px;
}

.article-body h1.article-title {
    font-size: 1.75rem;
    line-height: 1.3;
    margin-bottom: 12px;
}

.article-byline {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.75;
}

.article-content p {
    margin-bottom: 1.2em;
}

.article-content h1, .article-content h2, .article-content h3,
.article-content h4, .article-content h5, .article-content h6 {
    margin: 1.5em 0 0.5em;
    line-height: 1.3;
}

.article-content h2 { font-size: 1.4rem; }
.article-content h3 { font-size: 1.2rem; }

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 1em 0;
}

.article-content blockquote {
    border-left: 3px solid var(--primary);
    margin: 1em 0;
    padding: 0.5em 1em;
    color: var(--text-secondary);
    background: var(--bg-secondary);
    border-radius: 0 6px 6px 0;
}

.article-content pre {
    background: var(--code-bg);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1em 0;
    font-size: 0.85rem;
}

.article-content code {
    font-family: var(--font-mono);
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 2px 5px;
    border-radius: 4px;
}

.article-content pre code {
    background: none;
    padding: 0;
}

.article-content ul, .article-content ol {
    margin: 0.8em 0;
    padding-left: 1.5em;
}

.article-content li {
    margin-bottom: 0.3em;
}

.article-content a {
    color: var(--primary);
    text-decoration: underline;
    cursor: pointer;
}

.article-content a:hover {
    color: var(--primary-hover);
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2em 0;
}

/* Extraction failed */
.extraction-failed {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

.ef-card {
    background: var(--warn-bg);
    border: 1px solid var(--warn);
    border-radius: 12px;
    padding: 24px;
    max-width: 500px;
    text-align: center;
}

.ef-card h2 {
    color: var(--warn);
    margin-bottom: 8px;
}

.ef-info {
    margin: 16px 0;
}

.ef-info code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8rem;
    word-break: break-all;
}

.ef-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 16px;
}

/* Iframe */
.iframe-wrapper {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 80px);
}

.iframe-header {
    display: flex;
    gap: 8px;
    padding: 8px 0 16px;
}

.article-iframe {
    flex: 1;
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 8px;
}

/* Link menu */
.link-menu {
    position: fixed;
    background: var(--menu-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--menu-shadow);
    z-index: 1000;
    overflow: hidden;
    min-width: 220px;
}

.link-menu button {
    display: block;
    width: 100%;
    padding: 12px 16px;
    border: none;
    background: none;
    color: var(--text);
    font-size: 0.9rem;
    text-align: left;
    cursor: pointer;
    font-family: var(--font-sans);
}

.link-menu button:hover {
    background: var(--bg-secondary);
}

.link-menu button + button {
    border-top: 1px solid var(--border);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text);
    color: var(--bg);
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.9rem;
    z-index: 2000;
    animation: toast-in 0.3s ease;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(-50%) translateY(10px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* Save page */
.save-page h1 {
    margin-bottom: 20px;
}

.save-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.save-section h2 {
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.save-section label {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.save-section input[type="url"],
.save-section input[type="text"],
.save-section textarea {
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.95rem;
    font-family: var(--font-sans);
    resize: vertical;
}

.save-section input:focus,
.save-section textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.help-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

.help-text code {
    background: var(--code-bg);
    padding: 1px 5px;
    border-radius: 3px;
    font-size: 0.8em;
}

.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 0;
}

/* Settings */
.settings-page h1 {
    margin-bottom: 24px;
}

.settings-section {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.settings-section h2 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.key-form {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    margin-bottom: 16px;
}

.key-form input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    font-family: var(--font-sans);
}

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

.key-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.key-table th {
    text-align: left;
    padding: 8px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-weight: 500;
}

.key-table td {
    padding: 8px;
    border-bottom: 1px solid var(--border);
}

.key-table code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8em;
}

.api-key-reveal {
    background: var(--warn-bg);
    border: 1px solid var(--warn);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 24px;
}

.key-display {
    display: block;
    background: var(--code-bg);
    padding: 12px;
    border-radius: 8px;
    margin: 12px 0;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    word-break: break-all;
    cursor: pointer;
    user-select: all;
}

.key-display.copied {
    background: var(--success);
    color: #fff;
    transition: background 0.2s;
}

.api-doc pre {
    background: var(--code-bg);
    padding: 16px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 8px 0 16px;
    font-size: 0.8rem;
    line-height: 1.5;
}

.api-doc code {
    font-family: var(--font-mono);
}

.api-doc h3 {
    font-size: 0.95rem;
    margin: 16px 0 6px;
}

/* Utility */
.hidden { display: none !important; }
.inline { display: inline; }

.flash {
    padding: 10px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.flash.error {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

.error {
    color: var(--danger);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 640px) {
    .top-nav { height: auto; }
    .nav-inner { flex-direction: column; align-items: flex-start; padding: 10px 20px; gap: 8px; }
    .nav-links { gap: 0; }
    .article-card { flex-direction: column; }
    .article-card-actions { align-self: flex-end; }
    .reading-view { max-width: 100%; }
    .article-body h1.article-title { font-size: 1.4rem; }
    .key-form { flex-direction: column; }
    .ef-actions { flex-direction: column; }
}