/* СВОД — кабинет исполнителя. Дом-стиль АИ-кабинета (IBM Plex, синий #0f62fe,
 * сетка-фон, segmented-табы, аватар-меню, аккуратные карточки/таблицы).
 * Снято из ai_kabinet_src/studio.html и admin.html. Без фреймворков. */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { height: 100%; }
/* [hidden] должен скрывать даже элементы с явным display (иначе .skel-feed{display:grid} перебивает атрибут) */
[hidden] { display: none !important; }

:root {
  --blue: #0f62fe;
  --blue-hover: #0050e6;
  --blue-dark: #0043ce;
  --ink: #161616;
  --ink2: #525252;
  --ink3: #8c8c8c;
  --line: #e0e0e0;
  --bg: #fafafa;
  --ok: #24a148;
  --warn: #f1c21b;
  --danger: #da1e28;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

body {
  font-family: 'IBM Plex Sans', 'Inter', -apple-system, BlinkMacSystemFont, Roboto, Arial, sans-serif;
  background: #fff;
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  background-image:
    linear-gradient(to right, rgba(15,98,254,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(15,98,254,.04) 1px, transparent 1px);
  background-size: 32px 32px;
}
body.no-scroll { overflow: hidden; }

/* ============ TOPBAR ============ */
.topbar {
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 0 24px; display: flex; align-items: center; justify-content: space-between;
  gap: 18px; position: relative; z-index: 20; height: 56px;
}
.topbar::before { content: ''; position: absolute; left: 0; top: 0; width: 4px; height: 100%; background: var(--blue); }
.topbar-left { display: flex; align-items: center; gap: 18px; padding-left: 14px; height: 100%; min-width: 0; flex: 1 1 auto; overflow: hidden; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; flex-shrink: 0; cursor: pointer; }
.brand .logo {
  width: 30px; height: 30px; background: var(--blue);
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 11px; color: #fff; letter-spacing: .02em;
}
.brand .title { font-weight: 600; font-size: 13.5px; letter-spacing: .02em; color: var(--ink); white-space: nowrap; }
.brand .sub { font-size: 11px; color: var(--ink2); white-space: nowrap; }

/* Segmented nav */
.nav-tabs {
  display: flex; flex-wrap: nowrap; min-width: 0;
  border: 1px solid var(--line); background: #fff; height: 32px;
  overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none;
}
.nav-tabs::-webkit-scrollbar { display: none; }
.nav-tabs button {
  background: transparent; border: none; border-right: 1px solid var(--line);
  color: var(--ink2); font-size: 12px; font-weight: 500; letter-spacing: .01em;
  padding: 0 14px; height: 100%; cursor: pointer; font-family: inherit;
  display: flex; align-items: center; gap: 5px; white-space: nowrap; flex-shrink: 0;
  transition: background .12s, color .12s;
}
.nav-tabs button:last-child { border-right: none; }
.nav-tabs button:hover:not(.active) { background: #f4f4f4; color: var(--blue); }
.nav-tabs button.active { background: var(--blue); color: #fff; font-weight: 600; }

.topbar-right { display: flex; align-items: center; gap: 10px; height: 100%; flex-shrink: 0; flex-wrap: nowrap; }
.stat-chip {
  font-size: 11px; color: var(--ink2); font-family: var(--mono);
  letter-spacing: .04em; display: flex; align-items: center; gap: 8px;
  padding: 0 12px; height: 32px; background: #f4f4f4; border: 1px solid var(--line);
}
.stat-chip .dot { width: 6px; height: 6px; background: var(--ok); border-radius: 50%; box-shadow: 0 0 0 3px rgba(36,161,72,.18); flex-shrink: 0; }
.stat-chip .num { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.stat-chip .lbl { color: var(--ink3); text-transform: uppercase; font-size: 9.5px; letter-spacing: .08em; font-weight: 600; }

/* User menu */
.user-menu { position: relative; }
.user-avatar {
  width: 36px; height: 36px; border: none; cursor: pointer;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff; font-family: inherit; font-size: 14px; font-weight: 600; letter-spacing: .02em;
  display: flex; align-items: center; justify-content: center; transition: all .15s; position: relative;
}
.user-avatar:hover { transform: scale(1.05); box-shadow: 0 6px 18px -6px rgba(15,98,254,.6); }
.user-dropdown {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: #fff; border: 1px solid var(--line);
  min-width: 260px; box-shadow: 0 16px 40px -10px rgba(0,0,0,.18);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: all .15s; z-index: 50;
}
.user-dropdown.open { opacity: 1; visibility: visible; transform: translateY(0); }
.user-dropdown .head {
  padding: 18px 20px 14px; border-bottom: 1px solid var(--line); display: flex; gap: 12px; align-items: center;
  background: linear-gradient(135deg, rgba(15,98,254,.04), transparent);
}
.user-dropdown .head .av {
  width: 42px; height: 42px; background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: #fff; font-size: 15px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.user-dropdown .head .who .nm { font-size: 13.5px; font-weight: 600; color: var(--ink); }
.user-dropdown .head .who .rl { font-size: 9.5px; color: var(--blue); font-weight: 700; letter-spacing: .1em; text-transform: uppercase; margin-top: 6px; padding: 2px 7px; background: rgba(15,98,254,.1); display: inline-block; }
.user-dropdown .usage-row { padding: 13px 20px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--ink2); display: flex; justify-content: space-between; gap: 14px; }
.user-dropdown .usage-row b { color: var(--ink); font-family: var(--mono); font-weight: 600; }
.user-dropdown .items { padding: 6px 0; }
.user-dropdown .item {
  display: flex; align-items: center; gap: 12px; width: 100%;
  padding: 10px 20px; font-size: 13.5px; color: var(--ink);
  text-decoration: none; cursor: pointer; background: transparent; border: none; font-family: inherit; text-align: left;
}
.user-dropdown .item:hover { background: #f4f4f4; color: var(--blue); }
.user-dropdown .item .ic { font-size: 14px; width: 18px; text-align: center; color: var(--ink2); }

/* ============ LAYOUT ============ */
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 24px 80px; }
.view { display: none; }
.view.active { display: block; }
.page-head { margin-bottom: 22px; }
.page-head h1 { margin: 0 0 6px; font-size: 26px; font-weight: 300; letter-spacing: -.01em; color: var(--ink); }
.page-head .lead { margin: 0; font-size: 13.5px; color: var(--ink2); line-height: 1.6; max-width: 640px; }

/* Metric tiles */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 26px; }
.tile { background: #fff; border: 1px solid var(--line); padding: 16px 18px; position: relative; }
.tile::before { content: ''; position: absolute; left: 0; top: 0; width: 3px; height: 100%; background: var(--blue); opacity: 0; transition: opacity .12s; }
.tile:hover::before { opacity: 1; }
.tile .k { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink3); font-weight: 600; margin-bottom: 8px; }
.tile .v { font-size: 24px; font-weight: 400; color: var(--blue); font-family: var(--mono); font-variant-numeric: tabular-nums; line-height: 1.1; }
.tile .sub { font-size: 11px; color: var(--ink2); margin-top: 5px; }
.tile .v .stars { color: var(--warn); letter-spacing: 1px; }

/* Banner */
.banner {
  background: #fef3c7; border: 1px solid var(--warn); border-left: 4px solid var(--warn);
  padding: 12px 16px; font-size: 13px; color: var(--ink);
  display: flex; align-items: center; gap: 12px; margin-bottom: 22px; line-height: 1.45;
}
.banner .ico { font-size: 16px; line-height: 1; }

/* ============ FEED / CARDS ============ */
.section-title { font-size: 11px; text-transform: uppercase; letter-spacing: .08em; color: var(--blue); font-weight: 600; margin: 0 0 14px; display: flex; align-items: center; gap: 10px; }
.section-title .cnt { color: var(--ink3); font-weight: 500; }

.feed { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }

.card {
  background: #fff; border: 1px solid var(--line);
  display: flex; flex-direction: column; position: relative;
  transition: all .12s; overflow: hidden;
}
.card:hover { border-color: var(--blue); box-shadow: 0 8px 24px -10px rgba(15,98,254,.25); z-index: 1; }
.card__badges { display: flex; flex-wrap: wrap; gap: 6px; padding: 14px 16px 0; }
.card__body { padding: 12px 16px 0; flex: 1; }
.card__instruction { font-size: 13.5px; color: var(--ink); line-height: 1.5; margin: 0 0 10px; overflow-wrap: break-word; }
.card__preview {
  font-size: 12.5px; color: var(--ink2); line-height: 1.5; margin: 0;
  background: #f4f4f4; padding: 10px 12px; border-left: 2px solid var(--line);
  display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.card__foot {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 14px 16px; margin-top: 12px; border-top: 1px solid var(--line);
}
.card .price { font-family: var(--mono); font-size: 16px; font-weight: 600; color: var(--ink); font-variant-numeric: tabular-nums; }
.card .price .per { font-size: 10px; color: var(--ink3); font-weight: 500; text-transform: uppercase; letter-spacing: .04em; margin-left: 4px; }

/* Badges by domain / type */
.badge { display: inline-flex; align-items: center; font-size: 10.5px; font-weight: 600; letter-spacing: .03em; padding: 3px 9px; text-transform: uppercase; white-space: nowrap; }
.badge--type { background: rgba(15,98,254,.1); color: var(--blue); }
.badge--dom { background: #f4f4f4; color: var(--ink2); border: 1px solid var(--line); }
.badge--dom.d-social_monitoring { background: rgba(15,98,254,.08); color: var(--blue); border-color: transparent; }
.badge--dom.d-sociology { background: rgba(138,63,252,.1); color: #6929c4; border-color: transparent; }
.badge--dom.d-pedagogy { background: rgba(36,161,72,.12); color: #198038; border-color: transparent; }
.badge--dom.d-med { background: rgba(218,30,40,.1); color: #a2191f; border-color: transparent; }
.badge--dom.d-assistant_safety { background: rgba(241,194,27,.18); color: #8a6d0f; border-color: transparent; }

/* ============ BUTTONS ============ */
.btn {
  font-family: inherit; font-size: 13px; font-weight: 500; letter-spacing: .01em;
  padding: 9px 18px; border: 1px solid var(--line); background: #fff; color: var(--ink);
  cursor: pointer; transition: all .12s; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
}
.btn:hover { border-color: var(--blue); color: var(--blue); }
.btn--primary { background: var(--blue); border-color: var(--blue); color: #fff; }
.btn--primary:hover { background: var(--blue-hover); border-color: var(--blue-hover); color: #fff; }
.btn--ghost { background: #fff; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn--primary:disabled { background: var(--ink); border-color: var(--ink); color: rgba(255,255,255,.8); opacity: 1; }

/* ============ STATES ============ */
.state { text-align: center; padding: 60px 24px; color: var(--ink2); background: #fff; border: 1px solid var(--line); }
.state .ic { font-size: 42px; opacity: .5; margin-bottom: 12px; }
.state p { font-size: 14px; line-height: 1.6; margin: 0 0 16px; font-weight: 300; }
.state--error { border-color: rgba(218,30,40,.4); }
.spinner { width: 30px; height: 30px; border: 2px solid var(--line); border-top-color: var(--blue); border-radius: 50%; animation: spin .8s linear infinite; margin: 0 auto 12px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Skeletons */
.skel-feed { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }
.skel-card { background: #fff; border: 1px solid var(--line); padding: 16px; }
.skel { background: linear-gradient(90deg, #f4f4f4 25%, #ececec 50%, #f4f4f4 75%); background-size: 200% 100%; animation: shimmer 1.3s infinite; height: 12px; margin-bottom: 10px; }
.skel.w40 { width: 40%; } .skel.w70 { width: 70%; } .skel.w90 { width: 90%; }
.skel.tall { height: 44px; margin-top: 14px; }
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ============ WORKSPACE (fullscreen focus) ============ */
.workspace { position: fixed; inset: 0; background: var(--bg); z-index: 40; display: none; flex-direction: column; }
.workspace.open { display: flex; }
.ws-head {
  background: #fff; border-bottom: 1px solid var(--line); position: relative;
  padding: 0 24px; height: 56px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-shrink: 0;
}
.ws-head::before { content: ''; position: absolute; left: 0; top: 0; width: 4px; height: 100%; background: var(--blue); }
.ws-head-left { display: flex; align-items: center; gap: 14px; padding-left: 14px; min-width: 0; }
.ws-head-left .task-no { font-family: var(--mono); font-size: 13px; font-weight: 600; color: var(--ink); white-space: nowrap; }
.ws-progress { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.ws-progress .pill { font-size: 11px; color: var(--ink2); font-family: var(--mono); letter-spacing: .03em; display: flex; align-items: center; gap: 6px; }
.ws-progress .pill b { color: var(--blue); font-weight: 600; font-variant-numeric: tabular-nums; }
.ws-head-right { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.ws-body { flex: 1; overflow-y: auto; padding: 26px 24px 140px; }
.ws-inner { max-width: 980px; margin: 0 auto; }

/* Instruction */
.ws-instr { background: #fff; border: 1px solid var(--line); border-left: 4px solid var(--blue); margin-bottom: 18px; }
.ws-instr summary { padding: 12px 16px; cursor: pointer; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--blue); list-style: none; display: flex; align-items: center; gap: 8px; user-select: none; }
.ws-instr summary::-webkit-details-marker { display: none; }
.ws-instr summary::before { content: '▸'; transition: transform .15s; font-size: 10px; }
.ws-instr[open] summary::before { transform: rotate(90deg); }
.ws-instr .instr-body { padding: 0 16px 16px; font-size: 13.5px; color: var(--ink); line-height: 1.6; white-space: pre-wrap; overflow-wrap: break-word; }

/* Case content */
.ws-case { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--blue); padding: 20px 22px; margin-bottom: 18px; }
.ws-case .case-label { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink3); font-weight: 600; margin-bottom: 10px; }
.ws-case .case-text { font-size: 15px; line-height: 1.65; color: var(--ink); white-space: pre-wrap; overflow-wrap: break-word; }

/* Pairwise */
.pair-prompt { background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--blue); padding: 18px 22px; margin-bottom: 16px; }
.pair-prompt .case-label { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink3); font-weight: 600; margin-bottom: 10px; }
.pair-prompt .case-text { font-size: 15px; line-height: 1.6; color: var(--ink); white-space: pre-wrap; overflow-wrap: break-word; }
.pair-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.pair-col { background: #fff; border: 1px solid var(--line); display: flex; flex-direction: column; cursor: pointer; transition: all .12s; text-align: left; font-family: inherit; padding: 0; }
.pair-col:hover { border-color: var(--blue); }
.pair-col.chosen { border-color: var(--blue); box-shadow: 0 0 0 2px rgba(15,98,254,.2); }
.pair-col .pc-head { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; border-bottom: 1px solid var(--line); background: #f4f4f4; }
.pair-col .pc-tag { font-family: var(--mono); font-size: 14px; font-weight: 600; color: var(--blue); }
.pair-col .pc-key { font-size: 10px; color: var(--ink3); font-family: var(--mono); }
.pair-col.chosen .pc-head { background: rgba(15,98,254,.08); }
.pair-col .pc-body { padding: 16px; font-size: 14px; line-height: 1.6; color: var(--ink); white-space: pre-wrap; overflow-wrap: break-word; flex: 1; }

/* Answer form */
.ws-form { background: #fff; border: 1px solid var(--line); padding: 20px 22px; }
.ws-form .form-label { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--ink2); margin-bottom: 12px; display: block; }
.ws-field { margin-bottom: 20px; }
.ws-field:last-child { margin-bottom: 0; }
.ws-field > .fl { font-size: 13.5px; font-weight: 500; color: var(--ink); margin-bottom: 10px; display: block; }

.choice-row { display: flex; flex-wrap: wrap; gap: 8px; }
.choice-btn {
  font-family: inherit; font-size: 13px; color: var(--ink); background: #fff; border: 1px solid var(--line);
  padding: 9px 14px; cursor: pointer; transition: all .12s; display: inline-flex; align-items: center; gap: 8px; text-align: left;
}
.choice-btn:hover { border-color: var(--blue); color: var(--blue); }
.choice-btn.on { background: var(--blue); border-color: var(--blue); color: #fff; }
.choice-btn .hk { font-family: var(--mono); font-size: 10px; padding: 1px 5px; background: #f4f4f4; color: var(--ink2); border: 1px solid var(--line); }
.choice-btn.on .hk { background: rgba(255,255,255,.2); color: #fff; border-color: transparent; }

.scale-row { display: flex; flex-wrap: wrap; gap: 6px; }
.scale-btn {
  font-family: var(--mono); font-size: 14px; color: var(--ink); background: #fff; border: 1px solid var(--line);
  width: 44px; height: 44px; cursor: pointer; transition: all .12s; display: flex; align-items: center; justify-content: center; font-variant-numeric: tabular-nums;
}
.scale-btn:hover { border-color: var(--blue); color: var(--blue); }
.scale-btn.on { background: var(--blue); border-color: var(--blue); color: #fff; }

.ws-textarea {
  width: 100%; background: #f4f4f4; border: 1px solid transparent; border-bottom: 1px solid var(--ink3);
  color: var(--ink); font-size: 14px; font-family: inherit; line-height: 1.55; padding: 12px 14px;
  outline: none; resize: vertical; min-height: 96px; transition: all .12s;
}
.ws-textarea:focus { background: #fff; border-color: var(--blue); border-bottom-color: var(--blue); }
.ws-textarea::placeholder { color: var(--ink3); }
.ws-field.invalid > .fl { color: var(--danger); }
.ws-field.invalid .choice-row, .ws-field.invalid .scale-row { outline: 1px solid var(--danger); outline-offset: 4px; }
.ws-field.invalid .ws-textarea { border-color: var(--danger); border-bottom-color: var(--danger); }
.pair-cols.invalid { outline: 1px solid var(--danger); outline-offset: 4px; }

.ws-error { color: var(--danger); font-size: 12.5px; margin: 14px 0 0; display: none; }
.ws-error.show { display: block; }

/* Workspace footer bar */
.ws-foot {
  position: fixed; bottom: 0; left: 0; right: 0; background: #fff; border-top: 1px solid var(--line);
  box-shadow: 0 -8px 30px -12px rgba(0,0,0,.08); padding: 14px 24px; z-index: 45; display: none;
}
.ws-foot.show { display: block; }
.ws-foot-inner { max-width: 980px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.ws-foot .hints { font-size: 11px; color: var(--ink3); display: flex; flex-wrap: wrap; gap: 12px; }
.ws-foot .hints kbd { font-family: var(--mono); font-size: 10.5px; padding: 2px 6px; background: #f4f4f4; border: 1px solid var(--line); color: var(--ink2); }
.ws-foot .acts { display: flex; gap: 8px; flex-shrink: 0; }

/* Toast */
.toast {
  position: fixed; bottom: 92px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: #fff; padding: 11px 22px; font-size: 13px; z-index: 300;
  letter-spacing: .02em; opacity: 0; transition: opacity .2s; pointer-events: none; font-weight: 500;
  box-shadow: 0 14px 36px -8px rgba(0,0,0,.4); max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; }
.toast.err { background: #a2191f; }

/* Scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #f4f4f4; }
::-webkit-scrollbar-thumb { background: #c6c6c6; }
::-webkit-scrollbar-thumb:hover { background: #8c8c8c; }

/* ============ RESPONSIVE ============ */
@media (max-width: 780px) {
  .topbar { padding: 0 14px; }
  .topbar-left { padding-left: 0; gap: 12px; }
  .brand .sub { display: none; }
  .stat-chip { display: none; }
  .user-dropdown { position: fixed; left: 14px; right: 14px; top: 60px; min-width: auto; }
  .wrap { padding: 18px 14px 60px; }
  .metrics { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .page-head h1 { font-size: 22px; }
  .feed, .skel-feed { grid-template-columns: 1fr; }
  .pair-cols { grid-template-columns: 1fr; }
  .ws-body { padding: 18px 14px 160px; }
  .ws-head { padding: 0 14px; }
  .ws-head-left { padding-left: 0; }
  .ws-progress .pill.session { display: none; }
  .ws-foot { padding: 12px 14px; }
  .ws-foot .hints { display: none; }
  .ws-foot-inner { justify-content: stretch; }
  .ws-foot .acts { flex: 1; }
  .ws-foot .acts .btn { flex: 1; }
}
@media (max-width: 480px) {
  .metrics { grid-template-columns: 1fr; }
  .ws-textarea { font-size: 16px; }
  .scale-btn { width: 40px; height: 40px; }
}