/* ── POST ENGAGEMENT ───────────────────────────────────────────────────────
   Likes, comments (whole post or a selected passage) and private
   highlights. Paired with /blog/engage.js.                                */

:root {
  --hl-bg:       rgba(236, 196, 92, 0.30);
  --hl-bg-hover: rgba(236, 196, 92, 0.45);
  --cmt-line:    var(--accent-2);
  --cmt-bg:      var(--accent-2-soft);
  --like:        #EB817F;
}
[data-theme="light"] {
  --hl-bg:       rgba(250, 205, 70, 0.45);
  --hl-bg-hover: rgba(250, 205, 70, 0.65);
  --like:        #C2413F;
}

/* Prose is selectable so readers can highlight and comment; copying is
   still blocked by protect.js and blog.js. */
.post-content { -webkit-user-select: text; user-select: text; }
.post-content :is(.anchor, .toc-mobile, .diagram, .code-copy, .diagram-zoom, .series-box, .post-cta) { -webkit-user-select: none; user-select: none; }

/* ── Marks in the text ─────────────────────────────────────────────────── */
.post-content mark { color: inherit; background: none; }
.post-content mark.hl {
  background: var(--hl-bg);
  border-radius: 2px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  cursor: pointer;
  transition: background-color 0.15s;
}
.post-content mark.hl:hover { background: var(--hl-bg-hover); }
.post-content mark.cmt-mark {
  text-decoration: underline dotted var(--cmt-line);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  cursor: pointer;
  border-radius: 2px;
  transition: background-color 0.15s;
}
.post-content mark.cmt-mark:hover,
.post-content mark.cmt-mark.is-active { background: var(--cmt-bg); text-decoration-style: solid; }
.post-content mark.is-flash { animation: mark-flash 1.4s ease-out; }
@keyframes mark-flash {
  0%, 30% { box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 55%, transparent); }
  100% { box-shadow: 0 0 0 3px transparent; }
}

/* ── Selection toolbar ─────────────────────────────────────────────────── */
.sel-bar {
  position: fixed;
  z-index: 160;
  display: flex;
  gap: 2px;
  padding: 4px;
  background: var(--surface-3);
  border: 1px solid var(--border-2);
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  font-family: var(--font-body);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 0.14s, transform 0.14s;
}
.sel-bar.is-below { transform: translateY(-4px); }
.sel-bar.is-visible { opacity: 1; transform: none; }
.sel-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 10px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  font: 500 13px/1 var(--font-body);
  cursor: pointer;
  white-space: nowrap;
}
.sel-btn:hover, .sel-btn:focus-visible { background: var(--surface); color: var(--accent); }
.sel-btn svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
@media (pointer: coarse) { .sel-btn { padding: 11px 14px; font-size: 14px; } }

/* ── Like button + header actions ──────────────────────────────────────── */
.post-actions { display: flex; align-items: center; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.post-actions[hidden] { display: none; }
.like-btn, .comments-link {
  display: inline-flex; align-items: center; gap: 7px;
  height: 34px;
  padding: 0 13px;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  background: transparent;
  color: var(--text-muted);
  font: 500 0.8125rem/1 var(--font-body);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}
.like-btn:hover, .comments-link:hover { color: var(--text); border-color: var(--text-meta); }
.like-btn svg, .comments-link svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linejoin: round; }
.like-btn[aria-pressed="true"] { color: var(--like); border-color: color-mix(in oklab, var(--like) 55%, transparent); background: color-mix(in oklab, var(--like) 10%, transparent); }
.like-btn[aria-pressed="true"] svg { fill: currentColor; }
.like-count:not(:empty) { padding-left: 7px; border-left: 1px solid currentColor; border-left-color: color-mix(in oklab, currentColor 35%, transparent); font-variant-numeric: tabular-nums; }
.like-btn.is-popping svg { animation: like-pop 0.4s ease-out; }
@keyframes like-pop { 40% { transform: scale(1.3); } 100% { transform: scale(1); } }
.like-btn-lg { height: 38px; padding: 0 15px; font-size: 0.875rem; }

/* ── Responses section (end of post) ───────────────────────────────────── */
.responses { padding: 8px 0 36px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.responses-head { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 6px; }
.responses-head h2 { font-family: var(--font-display); font-weight: 400; font-size: 1.5rem; color: var(--text); }
.responses-count { color: var(--text-meta); font-size: 0.8em; }
.responses-tip { max-width: 60ch; font-size: 0.875rem; color: var(--text-meta); margin-bottom: 20px; }

.my-highlights { margin-bottom: 24px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); }
.my-highlights summary { cursor: pointer; padding: 12px 16px; font-size: 0.875rem; font-weight: 600; color: var(--text); }
.my-highlights summary span { color: var(--text-meta); font-weight: 400; }
.my-highlights-list { list-style: none; padding: 0 16px 12px; }
.my-highlights-list li { display: flex; gap: 12px; align-items: flex-start; padding: 10px 0; border-top: 1px solid var(--border); }
.hl-jump {
  flex: 1; text-align: left;
  border: 0; background: none; cursor: pointer;
  color: var(--text-muted);
  font: 400 0.875rem/1.5 var(--font-reading);
  padding: 0 0 0 10px;
  border-left: 3px solid var(--hl-bg-hover);
}
.hl-jump:hover { color: var(--text); }
.hl-remove { border: 0; background: none; cursor: pointer; color: var(--text-meta); font: 500 0.75rem/1.5 var(--font-body); }
.hl-remove:hover { color: var(--danger); }

.comment-list { list-style: none; }
.comment { padding: 16px 0; border-top: 1px solid var(--border); }
.comment:first-child { border-top: 0; }
.comment-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.comment-name { font-weight: 600; font-size: 0.9375rem; color: var(--text); }
.comment-time { font-size: 0.8125rem; color: var(--text-meta); }
.comment-badge { font-size: 0.75rem; color: var(--accent); background: var(--accent-soft); padding: 2px 8px; border-radius: 999px; }
.comment.is-pending { opacity: 0.85; }
.comment-replies { list-style: none; margin: 12px 0 0 4px; padding-left: 16px; border-left: 2px solid var(--border); }
.comment-replies .comment { padding: 10px 0; border-top: 0; }
.comment.is-admin > .comment-head .comment-name { color: var(--accent); }
.comment.is-admin > .comment-head .comment-name::after {
  content: "Author";
  margin-left: 8px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--accent-soft);
  font-size: 0.6875rem; font-weight: 600; letter-spacing: 0.02em;
  vertical-align: 1px;
}
.comment-body { white-space: pre-wrap; overflow-wrap: anywhere; font-size: 0.9375rem; line-height: 1.6; color: var(--text-muted); }
.comment-quote {
  display: block; width: 100%; text-align: left;
  margin: 4px 0 8px;
  padding: 6px 0 6px 12px;
  border: 0; border-left: 3px solid var(--cmt-line);
  background: none; cursor: pointer;
  font: italic 400 0.875rem/1.5 var(--font-reading);
  color: var(--text-meta);
}
.comment-quote-text { display: block; }
.comment-quote-jump { display: block; margin-top: 4px; font: 500 0.75rem/1 var(--font-body); font-style: normal; color: var(--cmt-line); opacity: 0; transition: opacity 0.15s; }
.comment-quote:hover .comment-quote-jump, .comment-quote:focus-visible .comment-quote-jump { opacity: 1; }
@media (hover: none) { .comment-quote-jump { opacity: 1; } }
.comments-note { font-size: 0.875rem; color: var(--text-meta); padding: 8px 0 4px; }
.comments-note[hidden] { display: none; }

/* ── Comment form ──────────────────────────────────────────────────────── */
.comment-form { margin-top: 16px; display: grid; gap: 12px; }
.cf-field { display: grid; gap: 6px; min-width: 0; }
.cf-label { font-size: 0.8125rem; font-weight: 600; color: var(--text); }
.cf-label em { font-style: normal; font-weight: 400; color: var(--text-meta); }
.cf-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.comment-form input, .comment-form textarea {
  width: 100%;
  padding: 0.625rem 0.75rem;
  background: var(--bg);
  border: 1px solid var(--border-2);
  border-radius: var(--radius);
  color: var(--text);
  font: 400 0.9375rem/1.5 var(--font-body);
}
.comment-form textarea { resize: vertical; min-height: 96px; }
.comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--accent); }
.cf-trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.cf-foot { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.cf-foot .btn:disabled { opacity: 0.6; cursor: progress; }
.cf-status { font-size: 0.8125rem; color: var(--text-meta); }
@media (max-width: 560px) { .cf-row { grid-template-columns: 1fr; } }

/* ── Passage drawer ────────────────────────────────────────────────────── */
.cmt-drawer {
  position: fixed;
  z-index: 170;
  top: calc(var(--nav-h) + 16px);
  right: 16px;
  bottom: 16px;
  width: min(400px, calc(100vw - 32px));
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 18px 20px 20px;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.32);
  font-family: var(--font-body);
  opacity: 0;
  transform: translateX(16px);
  transition: opacity 0.2s, transform 0.2s;
}
.cmt-drawer.is-open { opacity: 1; transform: none; }
.cmt-drawer-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.cmt-drawer-head h2 { font: 600 0.9375rem/1.3 var(--font-body); color: var(--text); }
.cmt-drawer-close {
  width: 32px; height: 32px; flex: none;
  border: 1px solid var(--border-2); border-radius: 50%;
  background: transparent; color: var(--text-muted);
  font-size: 20px; line-height: 1; cursor: pointer;
}
.cmt-drawer-close:hover { color: var(--text); border-color: var(--text-meta); }
.cmt-drawer-quote {
  margin: 0 0 12px;
  padding: 4px 0 4px 12px;
  border-left: 3px solid var(--cmt-line);
  font: italic 400 0.9375rem/1.55 var(--font-reading);
  color: var(--text-muted);
  max-height: 9.5em;
  overflow: auto;
}
.cmt-drawer-list { margin-bottom: 4px; }
.cmt-drawer-list[hidden] { display: none; }
.cmt-drawer .comment-form { margin-top: 8px; }
.cmt-drawer .cf-row { grid-template-columns: 1fr; }

@media (max-width: 640px) {
  .cmt-drawer {
    top: auto; left: 0; right: 0; bottom: 0;
    width: auto;
    max-height: 82vh; max-height: 82dvh;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border-bottom: 0;
    transform: translateY(24px);
  }
}

@media print {
  .sel-bar, .cmt-drawer, .post-actions, .responses { display: none !important; }
  .post-content mark { background: none !important; text-decoration: none !important; }
}