/* dialogos accounts / reader / share — shared by index.html and read.html */
:root {
  --bg-deep: #0a0a0f; --bg-panel: #0f0f18; --bg-surface: #161625; --bg-hover: #1c1c30; --bg-active: #252540;
  --border: #2a2a45; --border-glow: #3d3d6a;
  --text-primary: #c8c8e0; --text-secondary: #7878a0; --text-dim: #4a4a70;
  --accent-amber: #e8a84c; --accent-amber-dim: #b8762a; --accent-amber-glow: rgba(232, 168, 76, 0.15);
  --accent-cyan: #4ce8d8; --accent-cyan-dim: #2ab8a8; --accent-cyan-glow: rgba(76, 232, 216, 0.1);
  --accent-red: #e84c6a;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;
  --font-sans: 'IBM Plex Sans', sans-serif;
  --font-read: 'Literata', Georgia, 'Times New Roman', serif;
}

/* header with account pill */
.header { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; flex-wrap: wrap; }
.header a.brand { text-decoration: none; }
.acct { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.pill {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em;
  padding: 0.45rem 0.9rem; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-surface); color: var(--text-secondary); cursor: pointer; white-space: nowrap;
  transition: all 0.15s ease;
}
.pill:hover { border-color: var(--accent-cyan-dim); color: var(--accent-cyan); }
.pill.me { color: var(--accent-amber); border-color: var(--accent-amber-dim); }
.pill.me::before { content: '\25CF '; font-size: 0.6rem; vertical-align: 1px; }

/* modal */
.modal-back {
  position: fixed; inset: 0; background: rgba(5, 5, 10, 0.78); backdrop-filter: blur(3px);
  display: flex; align-items: flex-start; justify-content: center; z-index: 200;
  padding: max(4vh, env(safe-area-inset-top, 0px)) 16px 4vh; overflow-y: auto;
}
.modal-back[hidden] { display: none; }
.modal {
  width: 100%; max-width: 460px; background: var(--bg-panel); border: 1px solid var(--border-glow);
  border-radius: 8px; padding: 1.6rem 1.5rem 1.4rem; box-shadow: 0 0 40px rgba(0,0,0,0.5);
}
.modal h3 { font-family: var(--font-mono); font-weight: 400; letter-spacing: 0.2em; color: var(--accent-amber); font-size: 0.95rem; text-transform: uppercase; margin-bottom: 0.3rem; }
.modal .sub { font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 1.1rem; line-height: 1.5; }
.modal .tabs { display: flex; gap: 0.4rem; margin-bottom: 1.1rem; }
.modal .tabs button { flex: 1; }
.field { display: flex; flex-direction: column; gap: 0.3rem; margin-bottom: 0.8rem; }
.field label { font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--text-dim); text-transform: uppercase; }
.field input, .field textarea {
  font-family: var(--font-mono); font-size: 0.88rem; padding: 0.6rem 0.8rem; background: var(--bg-surface);
  border: 1px solid var(--border); border-radius: 4px; color: var(--text-primary); outline: none; width: 100%;
}
.field textarea { resize: vertical; min-height: 64px; }
.field input:focus, .field textarea:focus { border-color: var(--accent-amber-dim); box-shadow: 0 0 8px var(--accent-amber-glow); }
.field .hint { font-size: 0.74rem; color: var(--text-dim); line-height: 1.4; }
.modal .err { color: var(--accent-red); font-family: var(--font-mono); font-size: 0.78rem; min-height: 1.2em; margin: 0.2rem 0 0.6rem; }
.modal .row { display: flex; gap: 0.5rem; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.btn-primary {
  font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.75rem 1.4rem; border: none; border-radius: 4px; cursor: pointer; color: var(--bg-deep);
  background: linear-gradient(135deg, var(--accent-amber-dim) 0%, var(--accent-amber) 100%);
}
.btn-primary:disabled { opacity: 0.5; cursor: wait; }
.btn-ghost {
  font-family: var(--font-mono); font-size: 0.75rem; padding: 0.55rem 0.9rem; border-radius: 4px; cursor: pointer;
  background: var(--bg-surface); border: 1px solid var(--border); color: var(--text-secondary);
}
.btn-ghost:hover, .btn-ghost.on { border-color: var(--accent-cyan-dim); color: var(--accent-cyan); }
.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.chip {
  font-family: var(--font-mono); font-size: 0.74rem; padding: 0.4rem 0.75rem; border-radius: 999px; cursor: pointer;
  background: var(--bg-surface); border: 1px solid var(--border); color: var(--text-secondary);
}
.chip.on { border-color: var(--accent-amber-dim); color: var(--accent-amber); background: var(--bg-active); }
.stats-line { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 1rem; }
.stats-line b { color: var(--accent-cyan); font-weight: 500; }

/* share bar */
.share-bar {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; padding: 0.9rem 1rem; margin: 1rem 0;
  border: 1px solid var(--accent-cyan-dim); border-radius: 6px; background: linear-gradient(90deg, var(--accent-cyan-glow), transparent);
}
.share-bar .lead { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; color: var(--accent-cyan); text-transform: uppercase; margin-right: auto; }
.share-main {
  font-family: var(--font-mono); font-size: 0.82rem; font-weight: 500; letter-spacing: 0.06em; padding: 0.65rem 1.2rem;
  border-radius: 4px; border: none; cursor: pointer; color: var(--bg-deep); background: var(--accent-cyan);
}
.share-main:hover { box-shadow: 0 0 18px var(--accent-cyan-glow); }

/* reader */
.reader { max-width: 760px; margin: 0 auto; padding: 1.5rem 1.25rem 5rem; }
.reader-title { font-family: var(--font-read); font-weight: 600; font-size: 2rem; line-height: 1.2; color: #ece8f6; margin: 0.4rem 0 0.6rem; }
.reader-meta { font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-secondary); letter-spacing: 0.04em; }
.reader-meta span + span::before { content: ' · '; color: var(--text-dim); }
.prose { font-family: var(--font-read); font-size: 1.12rem; line-height: 1.75; color: #dcd9ea; margin-top: 1.4rem; }
.prose p { margin: 0 0 0.95em; }
.prose h2 { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent-amber); font-weight: 500; margin: 2.2em 0 0.9em; }
.prose h3 { font-family: var(--font-read); font-size: 1.2rem; color: #ece8f6; margin: 1.6em 0 0.6em; }
.prose ul, .prose ol { margin: 0 0 1em 1.3em; }
.prose li { margin-bottom: 0.35em; }
.prose hr { border: none; border-top: 1px solid var(--border); margin: 2em 0; }
.prose p.line { padding-left: 0; }
.prose .who {
  display: block; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-cyan); margin-bottom: 0.1em;
}
.prose p.line.b .who { color: var(--accent-amber); }
.prose em { color: #efe9ff; }

/* reactions */
.react { margin-top: 2.5rem; padding: 1.2rem 1.2rem 1rem; border: 1px solid var(--border); border-radius: 6px; background: var(--bg-panel); }
.react h4 { font-family: var(--font-mono); font-weight: 400; font-size: 0.72rem; letter-spacing: 0.18em; color: var(--text-secondary); text-transform: uppercase; margin-bottom: 0.8rem; }
.react .grp { margin-bottom: 0.8rem; }
.react .done { font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent-cyan); }

/* join banner */
.join {
  margin: 1.2rem 0; padding: 1rem 1.1rem; border: 1px solid var(--accent-amber-dim); border-radius: 6px;
  background: linear-gradient(90deg, var(--accent-amber-glow), transparent); display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap;
}
.join p { flex: 1 1 260px; font-size: 0.9rem; line-height: 1.5; }

/* history */
.hist { display: flex; flex-direction: column; gap: 0.5rem; }
.hist a {
  display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; text-decoration: none;
  padding: 0.75rem 0.9rem; border: 1px solid var(--border); border-radius: 4px; background: var(--bg-surface); color: var(--text-primary);
}
.hist a:hover { border-color: var(--accent-amber-dim); }
.hist .t { font-size: 0.92rem; overflow: hidden; text-overflow: ellipsis; }
.hist .m { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); white-space: nowrap; }
.hist .tag { font-family: var(--font-mono); font-size: 0.62rem; color: var(--accent-cyan); border: 1px solid var(--accent-cyan-dim); border-radius: 3px; padding: 0 0.3rem; margin-left: 0.4rem; }
.empty { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); }

.dlg-toast {
  position: fixed; left: 50%; bottom: calc(1.5rem + env(safe-area-inset-bottom, 0px)); transform: translate(-50%, 120px);
  padding: 0.7rem 1.2rem; background: var(--bg-active); border: 1px solid var(--accent-cyan-dim); border-radius: 4px;
  color: var(--accent-cyan); font-family: var(--font-mono); font-size: 0.8rem; opacity: 0; transition: all 0.3s ease; z-index: 300;
  max-width: calc(100vw - 32px); text-align: center;
}
.dlg-toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 640px) {
  .reader-title { font-size: 1.55rem; }
  .prose { font-size: 1.05rem; }
  .share-bar .lead { width: 100%; }
  .hist a { flex-direction: column; gap: 0.2rem; }
}

/* «Пояснити» — no backdrop-filter anywhere: it is the classic mobile jank source */
.ex-chip {
  position: fixed; z-index: 250; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em;
  padding: 0.5rem 0.8rem; border: 1px solid var(--accent-cyan); color: var(--accent-cyan); background: #0c0c16;
  border-radius: 4px; cursor: pointer; box-shadow: 0 4px 18px rgba(0,0,0,.5); -webkit-tap-highlight-color: transparent;
}
.ex-chip:hover { background: var(--accent-cyan); color: var(--bg-deep); }
.ex-back { position: fixed; inset: 0; z-index: 248; background: rgba(5,5,10,.55); }
.ex-panel { position: fixed; z-index: 249; background: #0e0e19; border: 1px solid var(--border-glow); color: var(--text-primary); }
.ex-panel.pop { width: 380px; max-width: calc(100vw - 16px); border-radius: 6px; padding: 1rem 1.1rem 0.8rem; box-shadow: 0 10px 40px rgba(0,0,0,.6); }
.ex-panel.sheet {
  left: 0; right: 0; bottom: 0; max-height: 75vh; overflow-y: auto; border-radius: 14px 14px 0 0; border-bottom: none;
  padding: 1.2rem 1.2rem calc(1.4rem + env(safe-area-inset-bottom, 0px)); border-top-color: var(--accent-cyan-dim);
}
.ex-x { position: absolute; right: 0.5rem; top: 0.4rem; background: none; border: none; color: var(--text-dim); font-size: 1rem; cursor: pointer; padding: 0.3rem 0.5rem; }
.ex-x:hover { color: var(--accent-cyan); }
.ex-echo { font-family: var(--font-read); font-style: italic; color: var(--text-secondary); font-size: 0.95rem; line-height: 1.45; padding-right: 1.6rem; }
.ex-mode { font-style: normal; font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent-cyan); }
.ex-body { margin-top: 0.7rem; font-family: var(--font-read); font-size: 1rem; line-height: 1.6; color: #e2dff0; }
.ex-body p + p { margin-top: 0.6em; }
.ex-wait { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); display: flex; gap: 0.5rem; align-items: center; }
.ex-wait i { display: inline-block; width: 0.5ch; height: 1em; background: var(--accent-cyan); animation: pulse 1.2s ease-in-out infinite; }
.ex-note { font-size: 0.9rem; color: var(--text-secondary); }
.ex-more { display: flex; gap: 0.5rem; margin-top: 0.8rem; }
.ex-link { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.08em; background: none; border: 1px solid var(--border); color: var(--accent-cyan); padding: 0.3rem 0.65rem; border-radius: 3px; cursor: pointer; }
.ex-link:hover { border-color: var(--accent-cyan-dim); }
.ex-foot { margin-top: 0.8rem; font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: 0.08em; color: var(--text-dim); }
@keyframes pulse { 0%, 100% { opacity: 0.35; } 50% { opacity: 1; } }

/* history of explanations */
.exh { border: 1px solid var(--border); border-radius: 4px; background: var(--bg-surface); margin-bottom: 0.5rem; }
.exh summary { list-style: none; cursor: pointer; padding: 0.7rem 0.9rem; display: flex; justify-content: space-between; gap: 1rem; align-items: baseline; }
.exh summary::-webkit-details-marker { display: none; }
.exh .q { font-family: var(--font-read); font-style: italic; font-size: 0.95rem; color: var(--text-primary); }
.exh .m { font-family: var(--font-mono); font-size: 0.66rem; color: var(--text-dim); white-space: nowrap; }
.exh .a { padding: 0 0.9rem 0.4rem; font-family: var(--font-read); font-size: 0.98rem; line-height: 1.6; color: #dcd9ea; }
.exh .a p + p { margin-top: 0.5em; }
.exh .src { display: inline-block; margin: 0 0.9rem 0.8rem; font-family: var(--font-mono); font-size: 0.7rem; color: var(--accent-cyan); text-decoration: none; }
.exh[open] { border-color: var(--accent-cyan-dim); }
@media (max-width: 640px) { .exh summary { flex-direction: column; gap: 0.2rem; } }

/* in-app browser notice (Telegram etc.) */
.inapp { display: flex; gap: 0.6rem; align-items: flex-start; padding: 0.75rem 1rem; background: #2a2210; border-bottom: 1px solid var(--accent-amber-dim);
  font-family: var(--font-sans); font-size: 0.86rem; line-height: 1.45; color: #f0dcb4; }
.inapp > div { flex: 1; }
.inapp button { font-family: var(--font-mono); font-size: 0.72rem; background: none; border: 1px solid var(--accent-amber-dim); color: var(--accent-amber); border-radius: 3px; padding: 0.3rem 0.55rem; margin-top: 0.35rem; cursor: pointer; }
.inapp button.x { border: none; margin: 0; font-size: 1rem; color: var(--text-dim); }

/* «Клас наживо» – shown to students while the teacher runs a live class */
.live-badge { position: fixed; left: 50%; bottom: calc(10px + env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 80;
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.08em; color: var(--text-secondary); background: #0a0a0f; box-shadow: 0 0 0 6px rgba(10,10,15,.6);
  border: 1px solid var(--border); border-radius: 999px; padding: 0.3rem 0.8rem; white-space: nowrap; max-width: 92vw; overflow: hidden; text-overflow: ellipsis; pointer-events: none; }
.live-badge i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #e84c6a; margin-right: 0.45rem; vertical-align: 1px; animation: livep 1.4s infinite; }
@keyframes livep { 50% { opacity: .25; } }
@media print { .live-badge { display: none; } }

/* «Бліц» door at the end of a dialogue */
.qdoor { margin: 2.2rem 0 0.4rem; border: 1px solid var(--accent-amber-dim); background: linear-gradient(180deg, var(--accent-amber-glow), transparent); padding: 1.1rem 1.2rem 1.2rem; border-radius: 4px; }
.qdoor .qd-eb { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.2em; color: var(--accent-amber); text-transform: uppercase; }
.qdoor .qd-t { font-family: var(--font-read); font-size: 1.2rem; color: #ece8f6; margin-top: 0.35rem; line-height: 1.35; }
.qdoor .qd-s { font-family: var(--font-read); font-size: 0.98rem; color: var(--text-secondary); margin-top: 0.35rem; line-height: 1.5; }
.qdoor .qd-row { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; margin-top: 0.9rem; }
.qdoor .qd-go { display: inline-flex; align-items: center; min-height: 46px; padding: 0 1.3rem; background: var(--accent-amber); color: var(--bg-deep); font-family: var(--font-mono); font-size: 0.85rem; letter-spacing: 0.14em; text-transform: uppercase; text-decoration: none; border-radius: 3px; }
.qdoor .qd-go.ghost { background: transparent; color: var(--accent-amber); border: 1px solid var(--accent-amber-dim); }
.qdoor .qd-ln { font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-secondary); text-decoration: none; }
.qdoor .qd-ln:hover { color: var(--accent-cyan); }
.qdoor .qd-spin { display: inline-block; width: 0.8em; height: 0.8em; border: 2px solid var(--accent-amber-dim); border-top-color: transparent; border-radius: 50%; animation: qdspin 0.9s linear infinite; margin-right: 0.5rem; vertical-align: -0.05em; }
@keyframes qdspin { to { transform: rotate(360deg); } }
.qd-hit { background: var(--accent-amber-glow); box-shadow: -10px 0 0 var(--accent-amber-glow), 10px 0 0 var(--accent-amber-glow); transition: background 1s; }
@media print { .qdoor { display: none !important; } }
/* blitz anchors: present for copy and scrapers, invisible to the reader */
.gh { position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0; }