:root {
  --ink: #111318;
  --ink-soft: #272b35;
  --paper: #f4f5f7;
  --white: #ffffff;
  --blue: #526dff;
  --blue-dark: #3047ca;
  --lime: #c8ff3d;
  --muted: #727784;
  --line: #dfe2e8;
  --soft-blue: #edf0ff;
  --red: #ef5b5b;
  --green: #24a174;
  --radius: 18px;
  --shadow: 0 18px 45px rgba(18, 22, 33, .08);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font-family: Inter, "Helvetica Neue", Arial, sans-serif; font-size: 16px; line-height: 1.5; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.app-shell { min-height: 100vh; display: grid; grid-template: 76px 1fr / 276px 1fr; }
.topbar { position: sticky; top: 0; z-index: 20; grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; padding: 0 30px; color: var(--white); background: var(--ink); border-bottom: 1px solid rgba(255,255,255,.12); }
.brand { display: inline-flex; align-items: center; color: var(--white); text-decoration: none; font-size: 21px; font-weight: 900; letter-spacing: -1.5px; }
.brand-mark { display: inline-grid; place-items: center; width: 29px; height: 29px; margin: 0 2px; color: var(--white); background: var(--blue); border-radius: 5px; }
.base-status { display: flex; align-items: center; gap: 9px; color: #d1d4dc; font-size: 14px; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(200,255,61,.12); }

.sidebar { position: sticky; top: 76px; height: calc(100vh - 76px); display: flex; flex-direction: column; padding: 34px 22px 24px; color: var(--white); background: var(--ink); }
.eyebrow { margin: 0 0 10px; color: var(--blue); font-size: 12px; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.sidebar > .eyebrow { color: #8b92a3; padding: 0 12px; }
.tool-nav { display: grid; gap: 6px; }
.nav-item { width: 100%; display: grid; grid-template-columns: 34px 1fr; gap: 10px; align-items: start; padding: 14px 12px; text-align: left; color: #b8bdc9; background: transparent; border: 0; border-radius: 12px; transition: .2s ease; }
.nav-item:hover { color: var(--white); background: rgba(255,255,255,.06); }
.nav-item.active { color: var(--white); background: var(--blue); }
.nav-number { padding-top: 2px; font-size: 12px; font-weight: 800; opacity: .7; }
.nav-item strong, .nav-item small { display: block; }
.nav-item strong { font-size: 16px; }
.nav-item small { margin-top: 2px; font-size: 12px; opacity: .72; }
.sidebar-note { margin-top: auto; padding: 18px; color: #bec3ce; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); border-radius: 14px; }
.sidebar-note span { display: inline-block; padding: 3px 7px; color: var(--ink); background: var(--lime); border-radius: 5px; font-size: 11px; font-weight: 900; text-transform: uppercase; }
.sidebar-note p { margin: 10px 0 0; font-size: 12px; }

.workspace { min-width: 0; padding: 42px clamp(20px, 4vw, 68px) 64px; }
.tool-view { max-width: 1260px; margin: 0 auto; }
.view-heading { min-height: 76px; display: flex; align-items: flex-start; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
h1, h2, h3, p { overflow-wrap: anywhere; }
h1 { margin: 0; font-size: clamp(32px, 4vw, 56px); line-height: .98; letter-spacing: -.045em; }
h2 { margin: 0; font-size: clamp(22px, 2.4vw, 32px); line-height: 1.1; letter-spacing: -.025em; }
.trust-label, .step-indicator, .level-chip { flex: none; display: inline-flex; align-items: center; padding: 8px 12px; color: var(--blue-dark); background: var(--soft-blue); border-radius: 999px; font-size: 13px; font-weight: 800; }
.level-chip { color: var(--ink); background: var(--lime); }
.card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }

.assistant-grid { display: grid; grid-template-columns: minmax(250px, 330px) minmax(0, 1fr); gap: 18px; }
.source-panel { padding: 24px; }
.source-panel label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 800; }
select { width: 100%; padding: 12px 38px 12px 12px; color: var(--ink); background: var(--paper); border: 1px solid var(--line); border-radius: 10px; }
.material-meta { margin: 18px 0; padding: 15px; color: var(--muted); background: #f8f9fb; border-left: 3px solid var(--blue); border-radius: 0 10px 10px 0; font-size: 13px; }
.material-meta strong { display: block; margin-bottom: 5px; color: var(--ink); }
.quick-prompts { display: grid; gap: 7px; padding-top: 5px; }
.quick-prompts p { margin: 0 0 4px; color: var(--muted); font-size: 12px; font-weight: 800; text-transform: uppercase; }
.quick-prompts button { padding: 10px 12px; text-align: left; color: var(--ink-soft); background: transparent; border: 1px solid var(--line); border-radius: 9px; }
.quick-prompts button:hover { color: var(--blue-dark); border-color: var(--blue); }
.chat-panel { min-height: 570px; display: grid; grid-template-rows: 1fr auto; overflow: hidden; }
.chat-log { max-height: 570px; overflow-y: auto; padding: 28px; }
.message { max-width: 760px; margin-bottom: 18px; padding: 17px 18px; border-radius: 14px; }
.message p { margin: 6px 0 0; }
.assistant-message { background: var(--paper); border-top-left-radius: 3px; }
.user-message { margin-left: auto; color: var(--white); background: var(--blue); border-bottom-right-radius: 3px; }
.message-role { font-size: 10px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; opacity: .66; }
.answer-note { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.answer-sources { display: grid; gap: 7px; margin: 12px 0 0; padding: 0; list-style: none; }
.answer-sources li { padding: 9px 11px; color: var(--ink-soft); background: var(--white); border: 1px solid var(--line); border-radius: 8px; font-size: 12px; }
.ask-form { display: grid; grid-template-columns: 1fr auto; gap: 10px; padding: 16px; background: var(--white); border-top: 1px solid var(--line); }
textarea { min-height: 54px; resize: vertical; padding: 14px; border: 1px solid var(--line); border-radius: 11px; outline: none; }
textarea:focus, select:focus, input:focus-visible, button:focus-visible { outline: 3px solid rgba(82,109,255,.25); outline-offset: 2px; }
.primary-button, .secondary-button { min-height: 46px; padding: 11px 18px; border-radius: 10px; font-weight: 850; border: 1px solid transparent; }
.primary-button { color: var(--white); background: var(--blue); }
.primary-button:hover { background: var(--blue-dark); }
.secondary-button { color: var(--ink); background: var(--white); border-color: var(--line); }
.secondary-button:hover { border-color: var(--blue); }

.route-layout, .quiz-layout { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(260px, .7fr); gap: 18px; }
.diagnostic, .quiz-card { min-height: 500px; padding: 28px; }
.progress-track { height: 7px; overflow: hidden; background: #e9ebf0; border-radius: 999px; }
.progress-track span { display: block; width: 0; height: 100%; background: var(--blue); border-radius: inherit; transition: width .25s ease; }
.diagnostic-question { margin: 44px 0 24px; max-width: 760px; font-size: clamp(24px, 3vw, 40px); line-height: 1.1; letter-spacing: -.03em; }
.option-list { display: grid; gap: 10px; }
.option-button { display: flex; align-items: center; gap: 12px; width: 100%; padding: 16px; text-align: left; color: var(--ink); background: var(--white); border: 1px solid var(--line); border-radius: 12px; }
.option-button:hover { border-color: var(--blue); background: var(--soft-blue); }
.option-letter { display: inline-grid; place-items: center; width: 30px; height: 30px; color: var(--blue-dark); background: var(--soft-blue); border-radius: 8px; font-weight: 900; }
.route-preview, .quiz-aside { padding: 25px; color: var(--white); background: var(--ink); border-color: var(--ink); box-shadow: none; }
.route-preview .eyebrow, .quiz-aside .eyebrow { color: var(--lime); }
.route-preview > p:last-child, .quiz-aside > p:last-child { color: #bec3ce; }
.route-list { display: grid; gap: 10px; margin-top: 22px; }
.route-item { display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 13px; background: rgba(255,255,255,.07); border-radius: 10px; }
.route-item span { color: var(--lime); font-weight: 900; }
.route-item strong, .route-item small { display: block; }
.route-item small { margin-top: 3px; color: #aeb4c0; }

.sim-tabs { display: flex; gap: 7px; margin-bottom: 14px; overflow-x: auto; padding-bottom: 4px; }
.sim-tab { flex: none; padding: 10px 15px; color: var(--muted); background: var(--white); border: 1px solid var(--line); border-radius: 999px; }
.sim-tab.active { color: var(--white); background: var(--ink); border-color: var(--ink); }
.simulator { display: grid; grid-template-columns: minmax(220px, .7fr) minmax(300px, 1fr) minmax(240px, .65fr); gap: clamp(22px, 4vw, 52px); align-items: center; min-height: 440px; padding: clamp(25px, 4vw, 48px); }
.sim-copy p:last-child { color: var(--muted); }
.controls { display: grid; gap: 24px; }
.controls label, .estimate-label { display: grid; grid-template-columns: 1fr auto; gap: 8px; font-size: 14px; font-weight: 750; }
.controls output, .estimate-label output { color: var(--blue-dark); font-weight: 900; }
input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--blue); }
.result-block { padding: 25px; background: var(--ink); color: var(--white); border-radius: 15px; }
.result-block span { color: #aeb4c0; font-size: 12px; font-weight: 800; text-transform: uppercase; }
.result-block strong { display: block; margin: 8px 0; color: var(--lime); font-size: clamp(30px, 4vw, 48px); line-height: 1; letter-spacing: -.04em; }
.result-block p { margin: 0; color: #c8ccd5; font-size: 13px; }
.chart-wrap { grid-column: 2 / 4; min-width: 0; }
canvas { display: block; width: 100%; height: 260px; background: #f8f9fb; border-radius: 12px; }
.chart-legend { grid-column: 2 / 4; display: flex; flex-wrap: wrap; gap: 15px; color: var(--muted); font-size: 12px; }
.chart-legend i { display: inline-block; width: 18px; height: 3px; margin: 0 5px 3px 0; }
.line-blue { background: var(--blue); }.line-red { background: var(--red); }.line-green { background: var(--green); }
.recommendation-card { grid-column: 2 / 4; min-height: 170px; display: flex; align-items: flex-end; padding: 25px; color: var(--white); background: linear-gradient(135deg, #536dfe, #222c65); border-radius: 15px; }
.recommendation-card strong { display: block; font-size: 26px; }
.recommendation-card span { font-size: 13px; opacity: .75; }
.recommend-actions { grid-column: 2; display: flex; gap: 8px; }
.interest-bars { grid-column: 3; display: grid; gap: 8px; }
.interest-row { display: grid; grid-template-columns: 78px 1fr 32px; gap: 8px; align-items: center; font-size: 12px; }
.interest-track { height: 7px; background: #e8eaf0; border-radius: 999px; overflow: hidden; }
.interest-track i { display: block; height: 100%; background: var(--blue); border-radius: inherit; transition: width .25s; }
.anchor-price { grid-column: 2 / 4; padding: 22px; text-align: center; color: var(--white); background: var(--ink); border-radius: 14px; font-size: 17px; }
.anchor-price strong { color: var(--lime); font-size: 28px; }
.estimate-label { grid-column: 2 / 4; }
.bias-actions { grid-column: 2 / 4; display: flex; gap: 8px; }
.inline-explanation { grid-column: 2 / 4; padding: 17px; background: var(--soft-blue); border-radius: 12px; }

.quiz-meta { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; margin-bottom: 12px; }
.quiz-question { margin: 42px 0 24px; font-size: clamp(24px, 3vw, 38px); line-height: 1.12; letter-spacing: -.025em; }
.quiz-feedback { margin-top: 18px; padding: 16px; border-radius: 11px; }
.quiz-feedback.correct { background: #e9f8f2; color: #166b50; }
.quiz-feedback.wrong { background: #fff0f0; color: #9f3535; }
.next-button { margin-top: 14px; }
.adapt-rule { display: flex; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.adapt-rule strong { color: var(--lime); }
.quiz-summary { padding-top: 42px; }
.quiz-summary strong { display: block; margin: 12px 0; color: var(--blue); font-size: 64px; line-height: 1; }

.toast { position: fixed; right: 24px; bottom: 24px; z-index: 50; max-width: 340px; padding: 13px 16px; color: var(--white); background: var(--ink); border-radius: 10px; box-shadow: var(--shadow); opacity: 0; transform: translateY(10px); pointer-events: none; transition: .2s ease; }
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .app-shell { grid-template: 68px auto 1fr / 1fr; }
  .topbar { padding: 0 18px; }
  .sidebar { position: sticky; top: 68px; z-index: 15; height: auto; padding: 8px 14px; overflow-x: auto; }
  .sidebar > .eyebrow, .sidebar-note { display: none; }
  .tool-nav { display: flex; min-width: max-content; }
  .nav-item { width: auto; grid-template-columns: auto 1fr; padding: 9px 12px; }
  .nav-item small { display: none; }
  .workspace { padding-top: 30px; }
  .simulator { grid-template-columns: 1fr 1fr; }
  .sim-copy { grid-column: 1 / -1; }
  .chart-wrap, .chart-legend, .recommendation-card, .anchor-price, .estimate-label, .bias-actions, .inline-explanation { grid-column: 1 / -1; }
  .recommend-actions { grid-column: 1; }.interest-bars { grid-column: 2; }
}

@media (max-width: 720px) {
  .base-status { font-size: 0; }.base-status::after { content: "База проверена"; font-size: 12px; }
  .workspace { padding: 25px 14px 40px; }
  .view-heading { min-height: 0; align-items: flex-end; }
  h1 { font-size: 34px; }
  .trust-label { display: none; }
  .assistant-grid, .route-layout, .quiz-layout, .simulator { grid-template-columns: 1fr; }
  .chat-panel { min-height: 500px; }
  .chat-log { max-height: 460px; padding: 18px; }
  .ask-form { grid-template-columns: 1fr; }
  .ask-form button { width: 100%; }
  .route-preview, .quiz-aside { min-height: auto; }
  .simulator { gap: 24px; padding: 24px 18px; }
  .recommend-actions, .interest-bars { grid-column: 1; }
  .chart-wrap, .chart-legend { grid-column: 1; }
  canvas { height: 220px; }
}

@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; } }