@font-face {
  font-family: 'Martian Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('fonts/martian-mono.woff2') format('woff2');
}

:root {
  color-scheme: dark;
  --bg: #2e3440;
  --bg2: #3b4252;
  --bg3: #434c5e;
  --border: #4c566a;
  --text: #eceff4;
  --text2: #d8dee9;
  --accent: #81a1c1;
  --good: #a3be8c;
  --bad: #bf616a;
  --radius: 12px;
  --max-w: 860px;
  --header-height: 120px;
  --font: 'Martian Mono', 'Cascadia Code', 'Fira Code', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { overflow-y: scroll; scrollbar-color: var(--border) var(--bg); }
body { background: var(--bg); color: var(--text2); font: 12px/1.6 var(--font); min-height: 100vh; padding-bottom: 48px; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; font-weight: 500; }
button, a, input { transition: background-color 120ms, color 120ms, border-color 120ms; }
button:disabled { opacity: 0.45; cursor: default; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
input:focus-visible { outline-offset: -2px; }
button, input { border-radius: var(--radius); }
input { min-width: 0; }
input::placeholder { color: var(--text2); opacity: 0.65; }
svg { display: block; }

header { position: sticky; top: 0; z-index: 100; padding: 16px 16px 0; background: var(--bg); }
.header-inner, .tabs { max-width: calc(var(--max-w) - 32px); margin: 0 auto; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.logo { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: 16px; font-weight: 500; white-space: nowrap; }
.logo-svg { width: 28px; height: 28px; flex-shrink: 0; }
.header-actions { display: flex; align-items: center; gap: 8px; min-width: 0; }
.header-actions #account-btn { min-width: 0; max-width: 240px; }
.header-actions #account-btn-label { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tabs-wrap { margin-top: 12px; }
.tabs { display: flex; gap: 8px; padding-bottom: 12px; }
.tab { position: relative; min-height: 40px; padding: 8px 16px; background: transparent; color: var(--text2); border: 0; border-bottom: 2px solid transparent; }
.tab:hover, .tab.active { color: var(--accent); background: var(--bg2); }
.tab.active { border-bottom-color: var(--accent); }

.btn, .btn-sync, .btn-accent, .btn-cancel, .btn-confirm-delete {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 40px; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: var(--radius); background: transparent; color: var(--accent);
  font-size: 12px; font-weight: 500; text-decoration: none; line-height: 1.5;
  white-space: nowrap;
}
.btn:hover:not(:disabled), .btn-sync:hover:not(:disabled), .btn-cancel:hover:not(:disabled) { background: var(--bg2); border-color: var(--accent); }
.btn-sm { min-height: 32px; padding: 5px 10px; font-size: 11px; }
.btn-accent { background: var(--accent); color: var(--bg); border-color: transparent; }
.btn-accent:hover:not(:disabled) { background: #88c0d0; border-color: transparent; }
.btn-danger { color: var(--bad); border-color: var(--bad); }
.btn-danger:hover:not(:disabled) { background: rgba(191, 97, 106, 0.15); border-color: var(--bad); }
.btn-confirm-delete { background: var(--bad); color: var(--text); border-color: transparent; }
.btn-confirm-delete:hover { background: var(--bad); filter: brightness(1.1); }
.icon-btn { width: 40px; min-height: 40px; padding: 8px; border-color: transparent; flex-shrink: 0; }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn:hover:not(:disabled) { background: var(--bg2); border-color: transparent; }
#refresh-btn[aria-busy="true"] svg { animation: refresh-spin 0.8s linear infinite; }
@keyframes refresh-spin { to { transform: rotate(360deg); } }
#add-feed-btn { width: 100%; }

main { max-width: var(--max-w); margin: 0 auto; padding: 16px; }
.section { display: none; }
.section.active { display: block; }
.articles-header { position: sticky; top: var(--header-height); z-index: 90; display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: -16px 0 0; padding: 16px 0; background: var(--bg); }
.feed-switcher-bar { position: relative; min-width: 0; }
.current-feed-title { color: var(--text); font-size: 16px; font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
.articles-toolbar { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.unread-count { font-size: 11px; }
#feed-sidebar-backdrop { display: none; }
#feed-sidebar-backdrop.open { display: block; }
.feed-sidebar-catcher { position: fixed; inset: 0; z-index: 250; }
.feed-sidebar-popup { position: absolute; top: calc(100% + 8px); left: 0; z-index: 251; width: 340px; max-width: calc(100vw - 32px); padding: 12px; background: var(--bg2); border: 1px solid var(--border); border-radius: var(--radius); }
.feed-sidebar-popup:focus { outline: none; }
.feed-search-wrap { position: relative; margin-bottom: 12px; }
.feed-search-wrap > svg { position: absolute; left: 12px; top: 14px; width: 16px; height: 16px; color: var(--accent); pointer-events: none; }
.feed-sidebar-search { width: 100%; padding: 10px 44px 10px 36px; border: 1px solid var(--border); background: transparent; color: var(--text); }
.search-clear { position: absolute; right: 2px; top: 2px; }
.search-clear[hidden] { display: none; }
#feed-sidebar-list { max-height: min(360px, 50vh); overflow-y: auto; overscroll-behavior-y: contain; }
.feed-sidebar-item { display: flex; align-items: center; gap: 8px; width: 100%; padding: 12px; margin-bottom: 4px; border: 0; background: transparent; color: var(--text2); text-align: left; }
.feed-sidebar-item:hover, .feed-sidebar-item:focus-visible { background: var(--bg3); }
.feed-sidebar-item.active { background: var(--bg3); }
.feed-sidebar-item.active { color: var(--accent); }
.fs-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.fs-count { min-width: 24px; padding: 0 4px; font-size: 11px; text-align: center; }
.feed-sidebar-item.has-unread .fs-name { color: var(--text); font-weight: 900; }
.feed-sidebar-item.has-unread .fs-count { color: var(--accent); font-size: 12px; font-weight: 900; }
.feed-sidebar-item.has-unread .feed-color-dot { width: 9px; height: 9px; }
.feed-color-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }

.article-item { padding: 12px; margin-bottom: 12px; background: var(--bg2); border-radius: var(--radius); }
.article-item:hover { background: rgba(67, 76, 94, 0.75); }
.article-item.unread { border-left: 3px solid var(--accent); }
.article-toggle { display: flex; align-items: flex-start; gap: 12px; width: 100%; border: 0; border-radius: 8px; padding: 0; background: transparent; text-align: left; color: inherit; font-weight: 400; }
.article-unread-dot { width: 6px; height: 6px; margin-top: 8px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.article-item.read .article-unread-dot { visibility: hidden; }
.article-body { flex: 1; min-width: 0; }
.article-title { display: block; font-size: 14px; font-weight: 700; line-height: 1.7; color: var(--text); overflow-wrap: anywhere; }
.article-item.read .article-title { color: var(--text2); font-weight: 500; opacity: 0.6; }
.article-item.read .article-meta { opacity: 0.6; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 12px; margin-top: 4px; font-size: 11px; }
.article-feed-badge { display: inline-flex; align-items: center; color: var(--accent); overflow-wrap: anywhere; max-width: 100%; }
.article-content { font-size: 12px; line-height: 1.8; margin: 12px 0 12px 18px; overflow-wrap: anywhere; }
.article-content p + p { margin-top: 8px; }
.article-expanded-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-left: 18px; }
.load-more-wrap { display: flex; justify-content: center; padding: 4px 0 12px; }
.empty-state { padding: 48px 16px; text-align: center; }
.empty-state p { color: var(--text); font-size: 14px; font-weight: 500; }
.empty-state small { display: block; max-width: 360px; margin: 8px auto 0; font-size: 12px; }

.manage-header { margin-bottom: 16px; }
.manage-header h2 { font-size: 16px; font-weight: 500; color: var(--text); }
.settings-card { padding: 12px; margin-bottom: 12px; border-radius: var(--radius); background: var(--bg2); }
.settings-card h3 { margin-bottom: 12px; font-size: 13px; font-weight: 500; color: var(--text); }
.form-group { margin-bottom: 12px; }
.form-group label { display: block; margin-bottom: 8px; }
.form-group input, .rename-row input { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border); background: transparent; color: var(--text); }
input:focus { border-color: var(--accent); }
.import-export-row { display: flex; flex-wrap: wrap; gap: 8px; }
.manage-feed-item { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; padding: 12px; margin-bottom: 12px; border-radius: var(--radius); background: var(--bg2); }
.manage-feed-info { flex: 1; min-width: 0; }
.manage-feed-info .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 13px; font-weight: 500; color: var(--text); }
.manage-feed-info .url { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 11px; margin-top: 4px; }
.manage-feed-info .status { font-size: 11px; margin-top: 4px; }
.manage-feed-info .error-text { color: var(--bad); }
.manage-feed-actions { display: flex; gap: 8px; margin-left: auto; flex-shrink: 0; }
.manage-feed-reorder { display: flex; flex-direction: column; gap: 4px; flex-shrink: 0; }
.manage-feed-reorder button { width: 32px; min-height: 32px; padding: 0; border: 0; background: transparent; color: var(--accent); font-size: 10px; }
.manage-feed-reorder button:hover:not(:disabled) { background: var(--bg3); }
.rename-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.rename-row input { flex: 1 1 160px; }
.settings-row { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.settings-row-text { min-width: 0; }
.settings-row-title { font-weight: 500; color: var(--text); }
.settings-row-desc { margin-top: 4px; }
.settings-row .btn-sync { max-width: 50%; overflow-wrap: anywhere; }

#auth-modal-backdrop, #confirm-modal-backdrop, #feed-picker-backdrop { display: none; position: fixed; inset: 0; z-index: 300; align-items: center; justify-content: center; padding: 16px; background: rgba(46, 52, 64, 0.85); }
#auth-modal-backdrop.open, #confirm-modal-backdrop.open, #feed-picker-backdrop.open { display: flex; }
#confirm-modal-backdrop { z-index: 400; }
.modal, .confirm-modal { width: 100%; max-width: 460px; max-height: calc(100dvh - 32px); overflow-y: auto; padding: 16px; border-radius: var(--radius); background: var(--bg2); }
.modal h3, .confirm-modal h3 { margin-bottom: 8px; font-size: 16px; font-weight: 500; color: var(--text); }
.modal-description { margin-bottom: 16px; }
.modal-actions, .confirm-actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.sync-info-box { padding: 12px; border-radius: var(--radius); background: var(--bg3); }
.sync-status-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--border); flex-shrink: 0; vertical-align: middle; }
.sync-status-dot.connected { background: var(--good); }
.lock-error { color: var(--bad); margin-top: 8px; }
.lock-error:empty { display: none; }
#auth-status-row { display: flex; align-items: center; gap: 8px; overflow-wrap: anywhere; }
#auth-status-text { min-width: 0; }
.confirm-feed-name { color: var(--text); overflow-wrap: anywhere; font-weight: 500; margin: 12px 0; }
.feed-picker-option { display: block; width: 100%; padding: 12px; margin-bottom: 8px; border: 1px solid var(--border); border-radius: var(--radius); background: transparent; color: var(--accent); text-align: left; }
.feed-picker-option:hover { border-color: var(--accent); background: var(--bg3); }
.fp-title { font-size: 12px; overflow-wrap: anywhere; }
.fp-url { margin-top: 4px; font-size: 11px; color: var(--text2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.toast { position: fixed; bottom: 16px; right: 16px; max-width: calc(100vw - 32px); padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg2); color: var(--text); z-index: 999; opacity: 0; transform: translateY(8px); transition: opacity 150ms, transform 150ms; pointer-events: none; }
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 600px) {
  .logo { font-size: 14px; }
  .header-actions { flex: 1; justify-content: flex-end; }
  .header-actions #account-btn { max-width: 120px; }
  .tabs { gap: 4px; }
  .tab { flex: 1; padding: 8px; }
  .articles-header { align-items: flex-start; flex-direction: column; gap: 8px; }
  .feed-switcher-bar { max-width: 100%; }
  .articles-toolbar { width: 100%; justify-content: space-between; }
  .feed-sidebar-search, .form-group input, .rename-row input { font-size: 16px; }
  .feed-search-wrap > svg { top: 18px; }
  .search-clear { top: 6px; }
  .article-title { font-size: 13px; }
  .article-expanded-actions { margin-left: 0; }
  .manage-feed-item { gap: 8px; }
  .manage-feed-actions { width: 100%; justify-content: flex-end; }
  .settings-row { align-items: flex-start; flex-direction: column; gap: 12px; }
  .settings-row .btn-sync { max-width: 100%; }
  .toast { left: 16px; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
  #refresh-btn[aria-busy="true"] svg { animation: none; }
}

[hidden] { display: none !important; }
:root { --sidebar-width: clamp(300px, 26vw, 380px); }
header { padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.header-inner { max-width: none; }
main { max-width: 1160px; padding-left: 296px; }
#navigation-sidebar { position: fixed; left: 0; top: var(--header-height); bottom: 0; width: var(--sidebar-width); padding: 8px; background: var(--bg2); border-right: 1px solid var(--border); display: flex; flex-direction: column; z-index: 110; font-size: 11px; }
.sidebar-heading, .sidebar-heading > div { display: flex; align-items: center; justify-content: space-between; }
.sidebar-heading { margin-bottom: 6px; }
#navigation-sidebar .icon-btn { width: 32px; min-height: 32px; padding: 6px; }
#navigation-sidebar .feed-search-wrap { margin-bottom: 6px; }
#navigation-sidebar .feed-sidebar-search { padding: 6px 8px; min-height: 32px; }
#navigation-sidebar .feed-sidebar-item { min-height: 30px; padding: 5px 8px; margin-bottom: 2px; }
#library-tree { overflow: auto; flex: 1; min-height: 0; overscroll-behavior: contain; }
.library-row { display: flex; align-items: center; min-height: 28px; padding-left: 4px; border-radius: 6px; }
.library-children { margin-left: 18px; padding-left: 3px; border-left: 1px solid var(--border); }
.folder-toggle { display: flex; align-items: center; justify-content: center; width: 20px; min-width: 20px; flex-shrink: 0; }
#library-tree .fs-name { white-space: normal; overflow: visible; overflow-wrap: anywhere; line-height: 1.5; }
#library-tree .fs-count:empty { display: none; }
.library-row.active, .library-row:hover { background: var(--bg3); }
.library-select { display: flex; align-items: center; flex: 1; min-width: 0; padding: 4px; background: transparent; border: 0; color: var(--text); text-align: left; min-height: 28px; }
.folder-toggle, .library-more, .library-drag-handle { background: transparent; border: 0; color: var(--accent); min-height: 28px; }
.folder-toggle { min-height: 20px; height: 20px; border: 1px solid var(--accent); border-radius: 5px; background: #81a1c126; color: var(--text); font-size: 14px; line-height: 1; }
.folder-toggle:hover, .folder-toggle:focus-visible { background: var(--accent); color: var(--bg); }
.folder-toggle[aria-expanded="true"] { background: #81a1c14d; }
.library-more, .library-drag-handle { min-width: 28px; flex-shrink: 0; }
.library-drag-handle { touch-action: none; cursor: grab; }
.library-root-drop, .library-hint { padding: 6px; font-size: 10px; color: var(--text2); }
.drop-target { outline: 2px solid var(--accent); outline-offset: -2px; background: var(--bg3); }
.dragging { opacity: .5; }
.sidebar-footer { display: flex; flex-wrap: wrap; gap: 6px; padding-top: 6px; border-top: 1px solid var(--border); }
.sidebar-footer .btn { min-height: 30px; padding: 4px 8px; font-size: 11px; }
#sidebar-shade, .mobile-sidebar-close { display: none; }
#library-menu { position: fixed; width: 232px; max-width: calc(100vw - 16px); z-index: 450; padding: 6px; background: var(--bg3); border: 1px solid var(--border); border-radius: 12px; box-shadow: 0 8px 28px #0005; }
#library-menu button { display: block; width: 100%; min-height: 44px; padding: 10px; text-align: left; color: var(--text); border: 0; background: transparent; }
#library-menu button:hover { background: var(--bg2); }
#library-modal-backdrop { display: none; position: fixed; inset: 0; z-index: 350; align-items: center; justify-content: center; padding: 16px; background: #2e3440dd; }
#library-modal-backdrop.open { display: flex; }
select { width: 100%; min-height: 44px; padding: 8px; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 8px; font: inherit; }
#library-error { color: var(--bad); }
.library-item-icon { width: 13px; height: 13px; flex-shrink: 0; margin: 0 4px; color: var(--accent); }
.library-item-icon svg { width: 100%; height: 100%; }
.library-root-drop { display: flex; justify-content: space-between; text-transform: uppercase; letter-spacing: .08em; }
.root-drop-hint { display: none; text-transform: none; letter-spacing: normal; }
.library-root-drop.drop-target .root-drop-hint { display: inline; }
.library-row { position: relative; }
.drop-before::before, .drop-after::after { content: ''; position: absolute; left: 0; right: 0; height: 2px; background: var(--accent); pointer-events: none; }
.drop-before::before { top: 0; }
.drop-after::after { bottom: 0; }
#add-feed-modal-backdrop { display: none; position: fixed; inset: 0; z-index: 320; align-items: center; justify-content: center; padding: 16px; background: #2e3440dd; }
#add-feed-modal-backdrop.open { display: flex; }
@media (min-width: 801px) {
  main { margin-left: var(--sidebar-width); max-width: none; padding: 16px; }
  main > .section { max-width: var(--max-w); margin: 0 auto; }
  .library-drag-handle { display: none; }
  .library-select { padding-right: 28px; }
  .library-more { position: absolute; right: 0; opacity: 0; }
  .library-row:hover .library-more, .library-row:focus-within .library-more { opacity: 1; }
}
@media (max-width: 800px) {
  .logo { gap: 4px; }
  .logo-svg { width: 22px; height: 22px; }
  .header-inner { gap: 4px; }
  .header-actions { gap: 2px; }
  .header-actions #account-btn { max-width: 96px; }
  main { padding-left: 16px; }
  #navigation-sidebar { display: none; width: min(420px, calc(100vw - 16px)); top: 0; z-index: 260; padding-top: max(12px, env(safe-area-inset-top)); padding-bottom: max(12px, env(safe-area-inset-bottom)); }
  .sidebar-open #navigation-sidebar { display: flex; }
  .sidebar-open #sidebar-shade { display: block; position: fixed; inset: 0; z-index: 255; background: #0008; border: 0; width: 100%; }
  .sidebar-open { overflow: hidden; }
  .mobile-sidebar-close { display: inline-flex; }
  .library-more, .library-drag-handle { min-width: 32px; }
  .library-row, .library-select, .library-more, .library-drag-handle { min-height: 36px; }
  .library-children { margin-left: 28px; }
  .folder-toggle { width: 28px; min-width: 28px; }
  .folder-toggle { height: 28px; min-height: 28px; }
  select { font-size: 16px; }
}