/* OpsDojo — Tactical Telemetry: dark CRT substrate, white phosphor, hazard red, 90° corners */
:root {
  --bg: #0d0d0d;
  --panel: #131313;
  --line: #262626;
  --line-strong: #3a3a3a;
  --fg: #eaeaea;
  --dim: #8a8a8a;
  --faint: #5a5a5a;
  --red: #e61919;
  --green: #4af626; /* reserved: lab-online indicator only */
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter', system-ui, -apple-system, sans-serif;
  --macro: 'Archivo Black', 'Inter', sans-serif;
}

* { box-sizing: border-box; border-radius: 0 !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 var(--sans);
  background-image: repeating-linear-gradient(0deg, transparent 0 3px, rgba(255,255,255,.012) 3px 4px);
}
a { color: inherit; }
::selection { background: var(--red); color: #fff; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 24px;
  padding: 0 20px; height: 52px;
  background: var(--bg); border-bottom: 1px solid var(--line-strong);
}
.brand { font: 20px/1 var(--macro); letter-spacing: -0.03em; text-decoration: none; }
.brand span { color: var(--red); }
.topbar nav { display: flex; gap: 4px; }
.topbar nav a {
  font: 11px/1 var(--mono); letter-spacing: .1em; text-decoration: none; color: var(--dim);
  padding: 8px 10px; border: 1px solid transparent;
}
.topbar nav a:hover { color: var(--fg); border-color: var(--line-strong); }
.topbar nav a.active { color: var(--fg); border-color: var(--red); }
.telemetry { font: 11px/1 var(--mono); letter-spacing: .08em; color: var(--dim); display: flex; gap: 18px; text-transform: uppercase; }
.telemetry b { color: var(--fg); font-weight: 700; }

main { max-width: 1440px; margin: 0 auto; padding: 0 20px 80px; }

/* ---------- shared atoms ---------- */
.meta { font: 11px/1.3 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--dim); }
.meta.red { color: var(--red); }
.macro {
  font-family: var(--macro); text-transform: uppercase; letter-spacing: -0.04em; line-height: .9; margin: 0;
}
.btn {
  font: 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase;
  background: transparent; color: var(--fg); border: 1px solid var(--line-strong);
  padding: 11px 16px; cursor: pointer;
}
.btn:hover { border-color: var(--fg); }
.btn.primary { background: var(--red); border-color: var(--red); color: #fff; }
.btn.primary:hover { background: #ff2a2a; }
.btn:disabled { opacity: .45; cursor: wait; }
.bar { height: 4px; background: var(--line); position: relative; }
.bar > i { position: absolute; inset: 0 auto 0 0; background: var(--fg); }
.bar.red > i { background: var(--red); }
hr.rule { border: 0; border-top: 1px solid var(--line-strong); margin: 0; }

/* ---------- home ---------- */
.hero {
  display: grid; grid-template-columns: 1fr 380px; gap: 1px; background: var(--line-strong);
  border: 1px solid var(--line-strong); margin-top: 28px;
}
.hero > * { background: var(--bg); padding: 28px; }
.hero h1 { font-size: clamp(3rem, 7vw, 6.5rem); }
.hero h1 em { font-style: normal; color: var(--red); }
.hero p { color: var(--dim); max-width: 60ch; margin: 18px 0 0; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line-strong); padding: 0 !important; }
.stat { background: var(--bg); padding: 20px; }
.stat data { display: block; font: 44px/1 var(--macro); letter-spacing: -0.04em; margin-top: 10px; }
.heat { grid-column: 1 / -1; background: var(--bg); padding: 20px; }
.heat-grid { display: grid; grid-template-columns: repeat(26, 1fr); gap: 3px; margin-top: 12px; }
.heat-grid i { aspect-ratio: 1; background: var(--line); }
.heat-grid i.l1 { background: #5a1010; } .heat-grid i.l2 { background: #9c1414; } .heat-grid i.l3 { background: var(--red); }

.section-head { display: flex; align-items: baseline; justify-content: space-between; margin: 44px 0 14px; }
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.6rem); }

.modules { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1px; background: var(--line-strong); border: 1px solid var(--line-strong); }
.module-card { background: var(--bg); padding: 20px; text-decoration: none; display: flex; flex-direction: column; gap: 10px; min-height: 190px; position: relative; }
.module-card:hover { background: var(--panel); }
.module-card .num { font: 64px/0.8 var(--macro); letter-spacing: -0.05em; color: var(--line-strong); position: absolute; right: 14px; top: 16px; }
.module-card:hover .num { color: var(--red); }
.module-card h3 { font: 22px/1 var(--macro); text-transform: uppercase; letter-spacing: -0.03em; margin: 18px 0 0; max-width: 75%; }
.module-card p { color: var(--dim); font-size: 13.5px; margin: 0; flex: 1; }
.module-card .foot { display: flex; justify-content: space-between; }
.module-card.done h3::after { content: ' ✓'; color: var(--red); }

/* ---------- module page ---------- */
.mod-head { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: end; padding: 36px 0 22px; border-bottom: 1px solid var(--line-strong); }
.mod-head h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); }
.mod-head p { color: var(--dim); margin: 14px 0 0; max-width: 70ch; }
.steps { list-style: none; margin: 0; padding: 0; border: 1px solid var(--line-strong); border-top: 0; }
.steps li { border-top: 1px solid var(--line); }
.steps a { display: grid; grid-template-columns: 54px 120px 1fr auto; gap: 16px; align-items: center; padding: 14px 18px; text-decoration: none; }
.steps a:hover { background: var(--panel); }
.steps .idx { font: 13px/1 var(--mono); color: var(--faint); }
.steps .title { font-weight: 600; }
.steps .state { font: 11px/1 var(--mono); letter-spacing: .1em; }
.steps .state.ok { color: var(--red); }
.steps .tickets { grid-column: 3 / 5; display: flex; gap: 6px; flex-wrap: wrap; margin-top: -6px; }
.steps .tickets span { font: 10px/1 var(--mono); border: 1px solid var(--line-strong); padding: 4px 6px; color: var(--dim); }
.steps .tickets span.ok { border-color: var(--red); color: var(--fg); }

/* ---------- step page ---------- */
.crumbs { padding: 18px 0 12px; display: flex; gap: 10px; align-items: center; }
.crumbs a { text-decoration: none; }
.crumbs a:hover { color: var(--fg); }
.step-title { font-size: clamp(2rem, 4vw, 3.4rem); margin: 4px 0 18px; }

.prose { max-width: 78ch; }
.prose h2 { font: 20px/1.1 var(--macro); text-transform: uppercase; letter-spacing: -0.02em; margin: 34px 0 10px; }
.prose h3 { font-size: 16px; margin: 24px 0 8px; }
.prose p, .prose li { color: #d6d6d6; }
.prose strong { color: #fff; }
.prose code { font: 13px/1.4 var(--mono); background: #1b1b1b; border: 1px solid var(--line); padding: 1px 5px; }
.prose pre { background: #0a0a0a; border: 1px solid var(--line-strong); border-left: 3px solid var(--red); padding: 14px 16px; overflow: auto; }
.prose pre code { background: none; border: 0; padding: 0; font-size: 13px; line-height: 1.55; }
.prose table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
.prose th, .prose td { border: 1px solid var(--line-strong); padding: 8px 10px; text-align: left; vertical-align: top; }
.prose th { font: 11px/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--dim); }
.prose blockquote { margin: 14px 0; padding: 4px 16px; border-left: 3px solid var(--line-strong); color: var(--dim); }

.theory-foot { display: flex; gap: 10px; align-items: center; justify-content: space-between; border-top: 1px solid var(--line-strong); margin-top: 40px; padding-top: 18px; max-width: 78ch; }

/* practice split */
.workbench {
  display: grid; grid-template-columns: minmax(360px, 44%) 1fr; gap: 1px;
  background: var(--line-strong); border: 1px solid var(--line-strong);
  height: calc(100vh - 52px - 120px); min-height: 520px;
}
.workbench > section { background: var(--bg); min-height: 0; display: flex; flex-direction: column; }
.task-pane { overflow: auto; }
.task-pane .inner { padding: 22px 24px 30px; }
.task-pane .step-title { font-size: clamp(1.6rem, 2.6vw, 2.4rem); }
.checklist { list-style: none; margin: 22px 0 0; padding: 0; border: 1px solid var(--line-strong); }
.checklist li { padding: 11px 14px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 26px 1fr; gap: 8px; font-size: 14px; }
.checklist li:first-child { border-top: 0; }
.checklist .mark { font: 13px/1.5 var(--mono); color: var(--faint); }
.checklist li.ok .mark { color: var(--fg); }
.checklist li.fail .mark { color: var(--red); }
.checklist .hint { grid-column: 2; font-size: 13px; color: var(--dim); margin-top: 4px; }
.checklist .hint::before { content: '> '; color: var(--red); font-family: var(--mono); }
.checklist details { grid-column: 2; margin-top: 4px; }
.checklist summary { font: 11px/1.4 var(--mono); color: var(--faint); cursor: pointer; letter-spacing: .06em; }
.checklist samp { display: block; white-space: pre-wrap; font: 12px/1.45 var(--mono); color: var(--dim); background: #0a0a0a; border: 1px solid var(--line); padding: 8px; margin-top: 6px; max-height: 160px; overflow: auto; }
.actions { position: sticky; bottom: 0; background: var(--bg); border-top: 1px solid var(--line-strong); padding: 14px 24px; display: flex; gap: 10px; align-items: center; }
.actions .verdict { margin-left: auto; font: 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.verdict.win { color: var(--fg); }
.verdict.win b { color: var(--red); }

.term-pane { position: relative; }
.term-head { display: flex; justify-content: space-between; align-items: center; padding: 9px 14px; border-bottom: 1px solid var(--line-strong); }
.dot { display: inline-block; width: 8px; height: 8px; background: var(--faint); margin-right: 8px; vertical-align: 1px; }
.dot.on { background: var(--green); box-shadow: 0 0 8px var(--green); }
.dot.warn { background: var(--red); }
.term { flex: 1; min-height: 0; padding: 8px 4px 4px 10px; background: #0a0a0a; }
.term .xterm-viewport { background: #0a0a0a !important; }
.term-overlay { position: absolute; inset: 37px 0 0 0; display: grid; place-content: center; text-align: center; background: rgba(10,10,10,.92); gap: 14px; }
.term-overlay .big { font: 28px/1 var(--macro); text-transform: uppercase; letter-spacing: -0.02em; }
.spinner::after { content: '▮▯▯'; font-family: var(--mono); color: var(--red); animation: blink 1s steps(3) infinite; }
@keyframes blink { 0% { content: '▮▯▯'; } 33% { content: '▯▮▯'; } 66% { content: '▯▯▮'; } }

/* mission board */
.board { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line-strong); border: 1px solid var(--line-strong); margin-top: 18px; }
.col { background: var(--bg); padding: 14px; min-height: 260px; }
.col > .meta { padding-bottom: 10px; border-bottom: 1px solid var(--line); margin-bottom: 12px; display: flex; justify-content: space-between; }
.ticket { display: block; text-decoration: none; border: 1px solid var(--line-strong); padding: 12px; margin-bottom: 10px; background: var(--panel); }
.ticket:hover { border-color: var(--fg); }
.ticket h4 { margin: 6px 0 8px; font-size: 14.5px; }
.prio { font: 10px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; padding: 3px 5px; border: 1px solid var(--line-strong); }
.prio.high, .prio.critical { border-color: var(--red); color: var(--red); }
.thread { margin: 16px 0 0; border: 1px solid var(--line-strong); }
.thread .msg { padding: 10px 14px; border-top: 1px solid var(--line); font-size: 14px; }
.thread .msg:first-child { border-top: 0; }
.thread .who { font: 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--red); margin-bottom: 5px; }

/* polygon & interview */
.grid-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1px; background: var(--line-strong); border: 1px solid var(--line-strong); }
.grid-list a { background: var(--bg); padding: 18px; text-decoration: none; min-height: 120px; display: flex; flex-direction: column; justify-content: space-between; gap: 14px; }
.grid-list a:hover { background: var(--panel); }
.grid-list h3 { margin: 0; font-size: 16px; }
.qa { border: 1px solid var(--line-strong); }
.qa details { border-top: 1px solid var(--line); }
.qa details:first-child { border-top: 0; }
.qa summary { list-style: none; cursor: pointer; padding: 14px 18px; display: grid; grid-template-columns: 70px 1fr auto; gap: 14px; align-items: baseline; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary:hover { background: var(--panel); }
.qa details[open] summary { background: var(--panel); }
.qa .answer { padding: 4px 18px 18px 102px; }
.qa .answer .row { display: flex; gap: 8px; margin-top: 12px; }
.tag-know { color: var(--fg); } .tag-repeat { color: var(--red); } .tag-skip { color: var(--dim); }

.empty { padding: 60px 0; color: var(--dim); }
.notice { border: 1px solid var(--red); padding: 14px 18px; margin-top: 20px; font-size: 14px; }
.notice code { font-family: var(--mono); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .workbench { grid-template-columns: 1fr; height: auto; }
  .term-pane { height: 70vh; }
  .board { grid-template-columns: 1fr; }
  .steps a { grid-template-columns: 40px 1fr auto; }
  .steps a .meta.kind { display: none; }
  .telemetry { display: none; }
  .topbar { grid-template-columns: auto 1fr; }
}

/* ---------- AI mentor ---------- */
.mentor { margin-top: 22px; border: 1px solid var(--line-strong); }
.mentor-head { display: flex; justify-content: space-between; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.mentor-log { max-height: 340px; overflow: auto; }
.mentor-log:empty { display: none; }
.mentor-empty { padding: 12px 14px; font-size: 13.5px; color: var(--dim); }
.mentor-empty a { color: var(--fg); }
.msg-me { padding: 8px 14px; font: 12px/1.4 var(--mono); letter-spacing: .04em; color: var(--dim); border-top: 1px solid var(--line); }
.msg-me::before { content: '> '; color: var(--red); }
.msg-ai { padding: 4px 14px 12px; font-size: 14px; border-left: 3px solid var(--red); margin: 0 0 0 0; }
.msg-ai p { margin: 8px 0; }
.msg-ai pre { margin: 8px 0; }
.mentor-ask { border-top: 1px solid var(--line); padding: 10px 14px; display: grid; gap: 8px; }
.mentor-ask textarea, .settings input, .settings select {
  width: 100%; background: #0a0a0a; color: var(--fg); border: 1px solid var(--line-strong);
  font: 13px/1.45 var(--mono); padding: 9px 10px; resize: vertical; outline: none;
}
.mentor-ask textarea:focus, .settings input:focus, .settings select:focus { border-color: var(--fg); }
.mentor-ask textarea:disabled { opacity: .4; }
.mentor-btns { display: flex; gap: 8px; }

/* ---------- settings ---------- */
.settings { max-width: 720px; margin-top: 24px; border: 1px solid var(--line-strong); padding: 22px; display: grid; gap: 18px; }
.settings .field { display: grid; gap: 6px; }
.settings .dim { color: var(--faint); text-transform: none; letter-spacing: .02em; font-size: 11.5px; line-height: 1.5; }
.settings code { font-family: var(--mono); color: var(--dim); }
.settings .row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }

/* ---------- strict progression ---------- */
.lock { font: 10.5px/1 var(--mono); letter-spacing: .1em; color: var(--faint); }
.module-card.locked { opacity: .38; cursor: not-allowed; }
.module-card.locked:hover { background: var(--bg); }
.module-card.locked:hover .num { color: var(--line-strong); }
.steps .row { display: grid; grid-template-columns: 54px 120px 1fr auto; gap: 16px; align-items: center; padding: 14px 18px; text-decoration: none; }
.steps a.row:hover { background: var(--panel); }
.steps li.locked .row { opacity: .38; cursor: not-allowed; }
.steps li.current { box-shadow: inset 3px 0 0 var(--red); }
.steps .here { color: var(--red); font: 11px/1 var(--mono); letter-spacing: .1em; }
.ticket.locked { opacity: .4; cursor: not-allowed; }
.ticket.locked:hover { border-color: var(--line-strong); }
.grid-list .locked { background: var(--bg); padding: 18px; min-height: 120px; display: flex; flex-direction: column; justify-content: space-between; gap: 14px; opacity: .38; cursor: not-allowed; }
#next-gated { opacity: .5; cursor: not-allowed; }
.lockscreen { max-width: 680px; margin: 60px 0; border: 1px solid var(--line-strong); padding: 32px; display: grid; gap: 14px; justify-items: start; }
.lockscreen h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
.lockscreen p { color: var(--dim); margin: 0; }
.lockscreen a:not(.btn) { color: var(--fg); }
.toggle { display: grid; grid-template-columns: 22px 1fr; gap: 10px; align-items: start; cursor: pointer; font-size: 14px; color: #d6d6d6; }
.toggle input { accent-color: var(--red); width: 16px; height: 16px; margin-top: 3px; }
@media (max-width: 900px) { .steps .row { grid-template-columns: 40px 1fr auto; } .steps .row .meta.kind { display: none; } }

/* nav never wraps; scrolls sideways on narrow screens */
.topbar nav { overflow-x: auto; scrollbar-width: none; }
.topbar nav::-webkit-scrollbar { display: none; }
.topbar nav a { white-space: nowrap; flex: none; }
@media (max-width: 900px) { .topbar { gap: 12px; } .topbar nav a { padding: 8px 6px; } }

/* ---------- «Помоги» on lesson fragments ---------- */
.has-ask { position: relative; }
.ask-btn {
  position: absolute; right: -40px; top: 0;
  width: 26px; height: 26px; padding: 0;
  font: 700 13px/24px var(--mono); text-align: center;
  background: var(--bg); color: var(--dim); border: 1px solid var(--line-strong);
  cursor: pointer; opacity: 0; transition: opacity .12s, color .12s, border-color .12s;
}
.has-ask:hover > .ask-btn, .ask-btn:focus-visible, .explaining > .ask-btn, .explaining > td:last-child > .ask-btn { opacity: 1; }
.ask-btn:hover { color: #fff; border-color: var(--red); background: var(--red); }
.ask-inside > .ask-btn { right: 4px; top: 4px; }
td.has-ask.ask-inside { padding-right: 36px; }
p.ask-inside, li.ask-inside, blockquote.ask-inside { padding-right: 32px; }
@media (hover: none) { .ask-btn { opacity: .55; } }
@media (max-width: 1100px) { .has-ask:not(.ask-inside) > .ask-btn { right: 2px; } .prose p.has-ask, .prose li.has-ask { padding-right: 32px; } .prose td.has-ask { padding-right: 36px; } }
.explaining { background: rgba(230, 25, 25, .045); }
tr.explaining td { background: rgba(230, 25, 25, .045); }

.explain { border: 1px solid var(--line-strong); border-left: 3px solid var(--red); background: #0b0b0b; margin: 10px 0 16px; }
.explain-row > td { padding: 0 !important; border-top: 0 !important; }
.explain-row .explain { margin: 0; border-left-width: 3px; }
.explain-head { display: flex; gap: 12px; align-items: center; padding: 8px 12px; border-bottom: 1px solid var(--line); }
.explain-head .frag { flex: 1; color: var(--faint); text-transform: none; letter-spacing: .02em; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.explain-head .x { background: none; border: 0; color: var(--dim); font-size: 18px; line-height: 1; cursor: pointer; padding: 0 2px; }
.explain-head .x:hover { color: var(--red); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 12px; }
.chip {
  font: 11.5px/1 var(--mono); letter-spacing: .03em; color: var(--fg);
  background: transparent; border: 1px solid var(--line-strong); padding: 7px 9px; cursor: pointer;
}
.chip:hover { border-color: var(--red); color: #fff; }
.chip.used { border-color: var(--faint); color: var(--dim); }
.chip:disabled { opacity: .45; cursor: wait; }
.explain-out:empty { display: none; }
.explain-out { border-top: 1px solid var(--line); max-height: 520px; overflow: auto; }
.explain-out .msg-ai { font-size: 14.5px; }
.explain-ask { display: flex; gap: 8px; padding: 10px 12px; border-top: 1px solid var(--line); }
.explain-ask input { flex: 1; background: #0a0a0a; color: var(--fg); border: 1px solid var(--line-strong); font: 13px/1.4 var(--mono); padding: 8px 10px; outline: none; min-width: 0; }
.explain-ask input:focus { border-color: var(--fg); }
.explain-ask .btn { padding: 8px 12px; }

/* wide tables scroll inside the lesson instead of overflowing the page */
.prose table { display: block; overflow-x: auto; max-width: 100%; }

/* ---------- «Что это?» on selections ---------- */
.sel-btn {
  font: 700 11.5px/1 var(--mono); letter-spacing: .04em;
  background: var(--red); color: #fff; border: 1px solid var(--red);
  padding: 7px 10px; cursor: pointer; white-space: nowrap;
}
.sel-btn:hover { background: #ff2a2a; }
.sel-btn.floating { position: absolute; z-index: 40; box-shadow: 0 4px 0 rgba(0,0,0,.6); }
.sel-btn.in-term { padding: 5px 8px; font-size: 10.5px; }
.term-tools { display: flex; gap: 10px; align-items: center; }
.sel-pop {
  position: absolute; z-index: 41; background: #0b0b0b;
  border: 1px solid var(--line-strong); border-left: 3px solid var(--red);
  box-shadow: 0 10px 0 rgba(0,0,0,.55); max-height: 70vh; display: flex; flex-direction: column;
}
.sel-pop .explain-out { max-height: 50vh; overflow: auto; border-top: 0; }
.sel-pop .chips { border-top: 1px solid var(--line); }
.sel-pop .msg-ai { font-size: 14px; }

/* ---------- quiz at the end of a module ---------- */
.quiz { border: 1px solid var(--line-strong); margin-top: 34px; padding: 20px 22px; }
.quiz > .meta.red { margin-bottom: 12px; }
.quiz-head { display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; border-bottom: 1px solid var(--line); padding-bottom: 10px; }
.quiz-list { list-style: none; margin: 0; padding: 0; }
.quiz-q { border-top: 1px solid var(--line); padding: 16px 0; }
.quiz-q:first-child { border-top: 0; }
.quiz-q .q { font-weight: 600; margin-bottom: 10px; }
.quiz-q .opts { display: grid; gap: 6px; }
.quiz-q .opts label { display: flex; gap: 10px; align-items: flex-start; padding: 8px 10px; border: 1px solid var(--line); cursor: pointer; }
.quiz-q .opts label:hover { border-color: var(--line-strong); background: var(--panel); }
.quiz-q .opts input { margin: 4px 0 0; accent-color: var(--red); }
.quiz-q.ok { border-left: 3px solid var(--fg); padding-left: 12px; }
.quiz-q.bad { border-left: 3px solid var(--red); padding-left: 12px; }
.quiz-q .opts label.right { border-color: var(--fg); }
.quiz-q .why { margin-top: 10px; font-size: 14px; color: var(--dim); }
.quiz-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.quiz-actions .verdict { margin-left: auto; font: 12px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.verdict.win { color: var(--fg); }

/* ---------- flashcards ---------- */
.panel { border: 1px solid var(--line-strong); padding: 20px 22px; margin-top: 24px; }
.panel > .meta.red { margin-bottom: 14px; }
.btn.x { padding: 4px 9px; line-height: 1; }
.inbox { list-style: none; margin: 0 0 6px; padding: 0; }
.inbox li { display: flex; gap: 12px; align-items: baseline; border-top: 1px solid var(--line); padding: 10px 0; }
.inbox li:first-child { border-top: 0; }
.inbox .txt { flex: 1; }
.inbox .meta { white-space: nowrap; }
.cards { list-style: none; margin: 0; padding: 0; }
.cards li { display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; align-items: start; border-top: 1px solid var(--line); padding: 14px 0; }
.cards li:first-child { border-top: 0; }
.cards li .btn.x { grid-column: 2; grid-row: 1; }
.cards .front { font-weight: 600; }
.cards .meta { grid-column: 1 / -1; }
.review-card { border: 1px solid var(--line-strong); padding: 26px; margin-bottom: 16px; min-height: 150px; }
.review-card .front { font-size: 19px; font-weight: 600; margin: 12px 0 18px; }
.review-card .back { border-top: 1px solid var(--line); padding-top: 16px; }
.sel-add { background: var(--fg); border-color: var(--fg); color: #0d0d0d; }
.sel-add:hover { background: #fff; }

/* ---------- trainer: assemble a long line from chunks ---------- */
.trainer { border: 1px solid var(--line-strong); margin-top: 22px; padding: 18px 20px; }
.trainer > .meta.red { margin-bottom: 10px; }
.tr-goal { border-left: 3px solid var(--red); padding: 8px 0 8px 12px; margin: 12px 0 16px; }
.tr-stage { border-top: 1px solid var(--line); padding: 14px 0; }
.tr-stage > .meta { margin-bottom: 8px; }
.tr-pool { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-tr {
  font: 13px/1.3 var(--mono); color: var(--fg); background: var(--panel);
  border: 1px solid var(--line-strong); padding: 7px 10px; cursor: pointer; text-align: left;
}
.chip-tr:hover { border-color: var(--fg); }
.chip-tr.chosen { background: var(--red); border-color: var(--red); color: #fff; }
.chip-tr:disabled { opacity: .35; cursor: not-allowed; }
.tr-line { border: 1px solid var(--line-strong); background: #0b0b0b; padding: 12px 14px; margin-top: 12px; overflow-x: auto; font: 13px/1.5 var(--mono); }

/* ---------- trainer page ---------- */
.tr-how { margin: 0; padding-left: 20px; }
.tr-how li { margin: 8px 0; }
.tr-list { display: grid; gap: 1px; background: var(--line-strong); border: 1px solid var(--line-strong); }
.tr-item { display: grid; gap: 4px; text-align: left; background: var(--bg); border: 0; color: var(--fg); padding: 12px 14px; cursor: pointer; font: inherit; }
.tr-item:hover { background: var(--panel); }
.tr-item.active { background: var(--panel); border-left: 3px solid var(--red); }
.tr-item .t { font-weight: 600; }
.tr-item.locked { opacity: .45; cursor: not-allowed; }
.tr-hintbox { border-left: 3px solid var(--red); background: var(--panel); padding: 12px 14px; margin-top: 12px; font-size: 14px; }