:root {
  --bg: #101010;
  --bg-2: #151515;
  --bg-3: #1b1b1b;
  --panel: #121212;
  --line: #2a2a2a;
  --line-soft: #202020;
  --text: #f3f3f3;
  --muted: #9a9a9a;
  --muted-2: #6f6f6f;
  --accent: #ffffff;
  --accent-soft: rgba(255, 255, 255, 0.12);
  --blue: #5da7ff;
  --yellow: rgba(255, 219, 87, 0.22);
  --yellow-strong: rgba(130, 180, 255, 0.3);
  --green: #57d187;
  --danger: #ff7878;
  --shadow: 0 18px 60px rgba(0, 0, 0, 0.45);
  --toolbar-height: 60px;
  --thread-width: 352px;
  --code-bg: #171717;
  --code-border: #2b2b2b;
  --card-bg: #141414;
  --card-border: #222222;
  --input-bg: #111111;
  --modal-bg: #171717;
  --modal-border: #2b2b2b;
  --editor-bg: #101010;
  --preview-bg: #111111;
  --topbar-bg: #121212;
  --fab-bg: #e0a86e;
  --fab-text: #101010;
  --fab-hover: #d49a60;
  --author-color: #e0a86e;
  --highlight-layer-bg: transparent;
  --thread-reply-border: #242424;
  --thread-footer-border: #1c1c1c;
  --hover-bg: rgba(255, 255, 255, 0.08);
  --hljs-text: #f3f3f3;
  --hljs-keyword: #f0c674;
  --hljs-string: #8bdc8b;
  --hljs-comment: #7a7a7a;
  --hljs-number: #ff8a65;
  --hljs-type: #7cc7ff;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-2: #f7f7f7;
  --bg-3: #eeeeee;
  --panel: #fafafa;
  --line: #e0e0e0;
  --line-soft: #ececec;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --muted-2: #999999;
  --accent: #000000;
  --accent-soft: rgba(0, 0, 0, 0.05);
  --blue: #2563eb;
  --yellow: rgba(255, 200, 50, 0.2);
  --yellow-strong: rgba(80, 130, 220, 0.2);
  --green: #22a85a;
  --danger: #dc2626;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
  --code-bg: #f5f5f5;
  --code-border: #e2e2e2;
  --card-bg: #ffffff;
  --card-border: #e0e0e0;
  --input-bg: #f5f5f5;
  --modal-bg: #ffffff;
  --modal-border: #e0e0e0;
  --editor-bg: #ffffff;
  --preview-bg: #fafafa;
  --topbar-bg: #fafafa;
  --fab-bg: #d4822e;
  --fab-text: #ffffff;
  --fab-hover: #c07528;
  --author-color: #b06820;
  --highlight-layer-bg: transparent;
  --thread-reply-border: #e0e0e0;
  --thread-footer-border: #ececec;
  --hover-bg: rgba(0, 0, 0, 0.06);
  --hljs-text: #1a1a1a;
  --hljs-keyword: #a85d00;
  --hljs-string: #1a7a2e;
  --hljs-comment: #999999;
  --hljs-number: #c74400;
  --hljs-type: #2563eb;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body { min-height: 100vh; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; }

button {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
}
button:hover { background: var(--hover-bg); }

button.icon-button {
  min-width: 38px; min-height: 38px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
}
button.primary { background: var(--text); color: var(--bg); border-color: transparent; }
button.primary:hover { opacity: 0.85; background: var(--text); }
button.ghost { border-color: transparent; }
button.text-button { border-color: transparent; padding-inline: 0.4rem; border-radius: 8px; }
button.danger { color: var(--danger); }

input, textarea {
  width: 100%; color: var(--text); background: transparent;
  border: 1px solid var(--line); border-radius: 10px; outline: none;
}
input:focus, textarea:focus { border-color: var(--muted); }

.hidden { display: none !important; }
.page-shell { min-height: 100vh; }
.simple-page { display: grid; place-items: center; }
.simple-page-content { width: min(560px, calc(100vw - 2rem)); }

.auth-shell { display: grid; place-items: center; padding: 2rem; position: relative; }
.auth-theme-toggle { position: absolute; top: 1rem; right: 1rem; }
.auth-layout { width: min(420px, 100%); }
.auth-layout h1 { margin: 0 0 0.8rem; font-size: 2rem; font-weight: 700; }
.auth-hint { margin: 0 0 1.5rem; color: var(--muted); line-height: 1.5; }
.auth-error { margin: 0 0 1rem; color: var(--danger); }
.auth-form { display: grid; gap: 0.75rem; }
.auth-form input { padding: 0.9rem 1rem; background: var(--input-bg); border-radius: 10px; }
.auth-actions { padding-top: 0.4rem; }
.auth-actions button { border-radius: 10px; padding: 0.8rem 1rem; }

.app-root { min-height: 100vh; }

.topbar {
  min-height: var(--toolbar-height);
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.5rem; padding: 0.4rem 1rem;
  border-bottom: 1px solid var(--line); background: var(--topbar-bg);
  position: sticky; top: 0; z-index: 30; flex-wrap: wrap;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }

.title-input {
  appearance: none; border: 0; padding: 0; background: transparent;
  color: var(--text); font-weight: 600; font-size: 1.1rem;
  width: min(40vw, 480px); min-width: 0;
}
.title-input:focus { border: 0; }
.topbar-title { font-size: 1.05rem; font-weight: 600; letter-spacing: 0.01em; }

.status-text, .meta-text, .note-row-meta, .thread-meta,
.empty-state, .toolbar-note, .thread-state, .search-hint { color: var(--muted); }
.status-text { font-size: 0.8rem; color: var(--muted-2); transition: opacity 600ms ease; }
.status-text.status-fade { opacity: 0; }
.thread-meta { font-size: 0.82rem; color: var(--muted-2); white-space: nowrap; }

.list-page { max-width: 980px; margin: 0 auto; padding: 1.25rem 1rem 3rem; }
.list-search-wrap { display: grid; gap: 0.35rem; margin-bottom: 1.25rem; }
.list-search { padding: 0.85rem 1rem; background: var(--input-bg); }
.note-list { border-top: 1px solid var(--line-soft); }

.note-row {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line-soft); cursor: pointer;
}
.note-row:hover .note-row-title { color: var(--accent); }
.note-row-title { font-size: 1rem; font-weight: 600; margin-bottom: 0.35rem; }
.note-row-snippet { color: var(--muted); line-height: 1.5; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.workspace {
  display: grid; grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - var(--toolbar-height)); overflow: hidden;
}
.editor-pane { border-right: 1px solid var(--line); background: var(--editor-bg); overflow: hidden; }

.editor-textarea {
  width: 100%; min-height: calc(100vh - var(--toolbar-height));
  padding: 2rem 2.25rem; border: 0; border-radius: 0; resize: none;
  background: transparent; color: var(--text);
  font-size: 0.88rem; line-height: 1.58;
  font-family: "SFMono-Regular", ui-monospace, Menlo, Monaco, Consolas, monospace;
  word-wrap: break-word; overflow-wrap: break-word; white-space: pre-wrap; overflow-x: hidden;
}
.editor-textarea:focus { border: 0; }

.preview-stage {
  min-height: calc(100vh - var(--toolbar-height));
  background: var(--input-bg); overflow: hidden; position: relative;
}

.preview-controls {
  position: absolute; top: 0.5rem; right: 0.5rem; z-index: 10;
  display: flex; gap: 0.35rem;
}
.preview-control-button {
  font-size: 0.78rem; padding: 0.3rem 0.55rem; border-radius: 6px;
  border: 1px solid var(--line); background: color-mix(in srgb, var(--preview-bg) 85%, transparent);
  color: var(--muted); backdrop-filter: blur(6px);
}
.preview-control-button:hover { background: var(--hover-bg); color: var(--text); }

.preview-scroll { overflow-y: auto; overflow-x: hidden; height: calc(100vh - var(--toolbar-height)); }
.preview-canvas { position: relative; min-height: 100%; }
.preview-content { max-width: 880px; min-height: 100%; margin: 0 auto; padding: 2rem 1.75rem 4rem 2.5rem; }
.preview-stage.public .preview-content { max-width: 980px; }

.markdown-body { color: var(--text); line-height: 1.6; overflow-wrap: break-word; word-wrap: break-word; word-break: break-word; }
.markdown-body > :first-child { margin-top: 0; }
.markdown-body h1, .markdown-body h2, .markdown-body h3,
.markdown-body h4, .markdown-body h5, .markdown-body h6 { margin: 1.65rem 0 0.8rem; line-height: 1.16; }
.markdown-body h1 { font-size: 2.2rem; }
.markdown-body h2 { font-size: 1.7rem; }
.markdown-body p, .markdown-body ul, .markdown-body ol,
.markdown-body pre, .markdown-body blockquote, .markdown-body table { margin: 0 0 1rem; }
.markdown-body ul, .markdown-body ol { padding-left: 1.4rem; }
.markdown-body li + li { margin-top: 0.25rem; }
.markdown-body code {
  font-family: "SFMono-Regular", ui-monospace, Menlo, Monaco, Consolas, monospace;
  font-size: 0.95em; background: var(--code-bg); padding: 0.15rem 0.3rem; border-radius: 6px;
}
.markdown-body pre {
  background: var(--code-bg); border: 1px solid var(--code-border); border-radius: 14px;
  padding: 0.85rem 1rem; overflow-x: auto; max-width: 100%; font-size: 0.85rem;
}
.markdown-body pre code { background: transparent; padding: 0; border-radius: 0; font-size: inherit; }
.markdown-body blockquote { margin-left: 0; padding-left: 1rem; border-left: 2px solid var(--line); color: var(--muted); }
.markdown-body table { width: 100%; border-collapse: collapse; }
.markdown-body th, .markdown-body td { border: 1px solid var(--line); padding: 0.55rem 0.7rem; text-align: left; }
.markdown-body a { color: var(--blue); }

.hljs { color: var(--hljs-text); background: transparent; }
.hljs-keyword, .hljs-selector-tag, .hljs-built_in, .hljs-name, .hljs-literal { color: var(--hljs-keyword); }
.hljs-string, .hljs-title, .hljs-section, .hljs-attribute { color: var(--hljs-string); }
.hljs-comment, .hljs-quote { color: var(--hljs-comment); }
.hljs-number, .hljs-symbol, .hljs-bullet { color: var(--hljs-number); }
.hljs-variable, .hljs-template-variable, .hljs-type { color: var(--hljs-type); }
.hljs-emphasis { font-style: italic; }
.hljs-strong { font-weight: 700; }

/* --- Highlight layer: always pointer-events:none, purely visual --- */
.highlight-layer { position: absolute; inset: 0; pointer-events: none; z-index: 1; }
.anchor-highlight {
  position: absolute; background: var(--yellow); border: 0; padding: 0;
  border-radius: 5px; pointer-events: none;
}
.anchor-highlight.active { background: var(--yellow-strong); }

/* --- Selection bubble: only desktop >= 980 --- */
.selection-bubble {
  position: absolute; z-index: 8; padding: 0.45rem 0.8rem;
  border: none; border-radius: 999px;
  background: var(--fab-bg); color: var(--fab-text); font-weight: 600;
  box-shadow: 0 4px 16px rgba(224, 168, 110, 0.35);
}
.selection-bubble:hover { background: var(--fab-hover); }

/* --- Comment FAB: shown via JS when bubble can't show --- */
.comment-fab {
  display: none; z-index: 8;
  padding: 0.45rem 0.8rem; border-radius: 999px;
  font-size: 0.88rem; font-weight: 600;
  align-items: center; justify-content: center; gap: 0.35rem;
  border: none; background: var(--fab-bg); color: var(--fab-text);
  box-shadow: 0 4px 16px rgba(224, 168, 110, 0.35);
}
.comment-fab:hover { background: var(--fab-hover); }

/* --- Thread rail: hidden by default, shown only on public desktop wide --- */
.thread-rail {
  position: absolute; top: 0; right: 0; width: var(--thread-width);
  min-height: 100%; padding: 2.5rem 0.55rem 1.25rem 0; display: none;
}

.thread-card {
  position: absolute; right: 0.5rem; width: calc(var(--thread-width) - 6px);
  background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 10px;
  padding: 0.55rem 0.75rem; box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
  font-size: 0.92rem;
}
.thread-card.active { border-color: var(--muted); }
.thread-card.resolved { opacity: 0.7; }

.modal-actions, .thread-footer, .thread-message-head, .thread-message-actions {
  display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap;
}

.thread-author { font-weight: 600; margin: 0; color: var(--author-color); font-size: inherit; }
.thread-author-small { font-size: inherit; }

.thread-tree { display: grid; gap: 0.45rem; }
.thread-node { margin-left: calc(var(--depth, 0) * 0.8rem); }
.thread-children { display: grid; gap: 0.4rem; margin-top: 0.25rem; }
.thread-body { white-space: pre-wrap; line-height: 1.38; margin-top: 0.08rem; }
.thread-body-small { font-size: inherit; }
.thread-message-root { margin-top: 0; }
.thread-message-reply { padding-left: 0.55rem; border-left: 1px solid var(--thread-reply-border); }

.thread-message-head { margin-bottom: 0.04rem; align-items: center; gap: 0.3rem; }
.thread-message-actions {
  margin-left: auto; gap: 0; flex-wrap: nowrap;
  opacity: 0.45; transition: opacity 100ms ease;
}
.thread-message:hover .thread-message-actions { opacity: 1; }

.thread-footer { margin-top: 0.3rem; padding-top: 0.25rem; border-top: 1px solid var(--thread-footer-border); gap: 0.35rem; }
.thread-footer-button { padding-inline: 0.1rem; font-size: 0.78rem; color: var(--muted-2); }
.thread-footer-button:hover { color: var(--muted); }
.thread-footer-button.danger { color: var(--muted-2); }
.thread-footer-button.danger:hover { color: var(--danger); }

.compact { width: min(480px, calc(100vw - 2rem)); padding: 0.85rem !important; }
.compact textarea, .compact input { min-height: 0; background: var(--input-bg); border: 1px solid var(--line); }
.compact textarea { min-height: 100px; padding: 0.75rem 0.85rem; border-radius: 10px; }
.compact .modal-actions { margin-top: 0.6rem; gap: 0.5rem; }
.compact .modal-actions button { font-size: 0.92rem; }
.compact .modal-actions .ghost { color: var(--muted); border-color: transparent; }
.compact .modal-actions .primary { padding: 0.5rem 0.9rem; }
.compact .field + .field, .compact .field + .modal-actions { margin-top: 0.5rem; }

.icon-action {
  width: 20px; height: 20px; min-width: 20px; min-height: 20px;
  padding: 0; border: 0; border-radius: 4px;
  color: var(--muted-2); background: transparent;
  display: inline-flex; align-items: center; justify-content: center;
}
.icon-action:hover { background: var(--hover-bg); color: var(--text); }
.icon-action.danger { color: var(--muted-2); }
.icon-action.danger:hover { color: var(--danger); }
.icon-action svg { width: 12px; height: 12px; display: block; }

.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0, 0, 0, 0.55);
  display: grid; place-items: center; z-index: 100; padding: 1rem;
}
.modal {
  width: min(460px, calc(100vw - 2rem)); background: var(--modal-bg);
  border: 1px solid var(--modal-border); border-radius: 14px; box-shadow: var(--shadow); padding: 1rem;
}
.modal h2 { margin: 0 0 0.2rem; font-size: 1rem; }
.modal p { margin: 0 0 0.65rem; color: var(--muted); line-height: 1.4; }
.modal input, .modal textarea { background: var(--input-bg); padding: 0.72rem 0.82rem; }
.modal textarea { min-height: 88px; resize: vertical; }
.modal .field + .field, .modal .field + .modal-actions { margin-top: 0.55rem; }

.thread-modal { padding: 0.75rem !important; position: relative; max-height: calc(100vh - 2rem); overflow-y: auto; }
.thread-modal-close {
  position: absolute; top: 0.45rem; right: 0.45rem; z-index: 2;
  width: 28px; height: 28px; min-width: 28px; min-height: 28px;
  padding: 0; border: 0; border-radius: 6px; background: transparent;
  color: var(--muted); font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
}
.thread-modal-close:hover { background: var(--hover-bg); color: var(--text); }
.thread-modal-body { padding-right: 1.5rem; }
.inline-error { color: var(--danger); margin-top: 0.65rem; }
.public-page-topbar .topbar-title-subtle { color: var(--muted); font-size: 0.95rem; }

/* --- Wide public desktop: show rail --- */
@media (min-width: 1200px) {
  .preview-stage.public .thread-rail { display: block; }
  .preview-stage.public .preview-canvas { padding-right: calc(var(--thread-width) + 20px); }
}

/* --- Preview FAB and close button (editor mobile only) --- */
.preview-fab {
  display: none; position: fixed; bottom: 1.25rem; left: 1.25rem; z-index: 20;
  padding: 0.5rem 1rem; border-radius: 999px; font-size: 0.88rem; font-weight: 600;
  border: 1px solid var(--line); background: var(--panel); color: var(--text);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}
.preview-fab:hover { background: var(--hover-bg); }

.preview-close-button {
  display: none; position: sticky; top: 0; right: 0; z-index: 12;
  width: 36px; height: 36px; min-width: 36px; min-height: 36px;
  margin-left: auto; padding: 0; border: 0; border-radius: 8px;
  background: color-mix(in srgb, var(--preview-bg) 85%, transparent); color: var(--muted); font-size: 1.3rem;
  backdrop-filter: blur(6px);
  align-items: center; justify-content: center;
}
.preview-close-button:hover { background: var(--hover-bg); color: var(--text); }

/* --- Narrow / mobile --- */
@media (max-width: 980px) {
  .workspace { grid-template-columns: 1fr; }
  .editor-pane { border-right: 0; border-bottom: none; }

  /* Hide preview by default in editor, show when toggled */
  .workspace .preview-stage {
    position: fixed; inset: 0; z-index: 40;
    transform: translateX(100%);
    transition: transform 250ms ease;
    min-height: 100vh; height: 100vh;
  }
  .workspace .preview-stage.preview-open {
    transform: translateX(0);
  }
  .workspace .preview-stage .preview-close-button { display: flex; }
  .preview-fab { display: flex; }

  /* Editor takes full height */
  .editor-textarea { min-height: calc(100vh - var(--toolbar-height)); }

  .preview-scroll, .preview-stage { height: 100vh; min-height: 100vh; }
  .preview-scroll { height: 100%; }
  .preview-canvas { padding-right: 0; }
  .preview-content, .preview-stage.public .preview-content { width: auto; max-width: none; padding: 2rem 1rem 1rem; }
  .thread-rail { display: none !important; }
  .selection-bubble { display: none !important; }
  .topbar-desktop { display: none !important; }

  /* Public page doesn't need the fab/close, preview is always visible */
  .preview-stage.public { position: static; transform: none; min-height: auto; height: auto; }
  .preview-stage.public .preview-close-button { display: none; }
  .preview-stage.public ~ .preview-fab { display: none !important; }
}