/* Repet5 — чистый стиль в духе Apple, яркая палитра в духе Duolingo, тонкий шрифт, док снизу */
:root {
  --bg: #f5f5f7; --card: #fff; --text: #1d1d1f; --muted: #6e6e73; --line: #e5e5ea;
  --accent: #0071e3; --ok: #1f9d55; --bad: #d70015; --warn: #b25000; --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", "Inter", "Segoe UI", Roboto, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 300 17px/1.55 var(--font); letter-spacing: -0.01em; min-width: 320px; }
b, strong, h1, h2, h3 { font-weight: 500; }
a { color: inherit; text-decoration: none; }
.muted { color: var(--muted); } .small { font-size: 14px; } .ok { color: var(--ok); } .bad { color: var(--bad); }
.link { color: var(--accent); } .link:hover { text-decoration: underline; } .block { display: block; padding: 3px 0; }

.top { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; max-width: 1040px; margin: 0 auto; padding: 22px 20px 4px; }
.brand { font-weight: 500; font-size: 19px; letter-spacing: -0.02em; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 8px 20px 140px; }
.foot { max-width: 1040px; margin: 0 auto; padding: 0 20px 130px; text-align: center; }

.hero { padding: 40px 0 20px; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; font-weight: 600; letter-spacing: -0.035em; margin: 0 0 14px; }
.lead { font-size: 20px; color: var(--muted); max-width: 640px; margin: 0; }
.page-title { font-size: 34px; font-weight: 600; letter-spacing: -0.03em; margin: 18px 0; }
h2 { font-size: 19px; margin: 0 0 12px; letter-spacing: -0.02em; }
h3 { font-size: 16px; margin: 0 0 6px; }
.group { margin: 16px 0 6px; color: var(--muted); font-weight: 400; font-size: 14px; text-transform: uppercase; letter-spacing: .04em; }
.mt { margin-top: 26px; }

.grid { display: grid; gap: 16px; margin: 16px 0; }
.grid.two { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid.three { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.grid.four { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }
.row { display: flex; align-items: center; } .gap { gap: 10px; flex-wrap: wrap; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

.card { display: block; background: var(--card); border-radius: var(--radius); padding: 22px; box-shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.04); margin: 16px 0; border: 0; text-align: left; font: inherit; color: inherit; }
.grid > .card { margin: 0; }
.card.flat { box-shadow: none; border: 1px solid var(--line); background: rgba(255,255,255,.6); }
.card.item { padding: 16px 20px; margin: 10px 0; transition: transform .15s ease, box-shadow .15s ease; }
.card.item:hover, .subject:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(0,0,0,.08); }

.chooser { margin: 10px 0 30px; }
.segmented { display: inline-flex; background: #e8e8ed; border-radius: 12px; padding: 3px; margin-bottom: 4px; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 7px 22px; border-radius: 9px; cursor: pointer; font-size: 15px; }
.segmented input:checked + span { background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.12); font-weight: 400; }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); }
.subject { cursor: pointer; display: flex; flex-direction: column; gap: 4px; padding: 28px; transition: transform .15s, box-shadow .15s; }
.subject-icon { font-size: 40px; line-height: 1; font-weight: 200; }
.subject-name { font-size: 26px; font-weight: 500; letter-spacing: -0.02em; margin-top: 8px; }
.topics { margin-top: 6px; }
.features p { margin: 0; font-size: 15px; }

.filters { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; padding: 14px; }
select, input[type=text], input:not([type]), input[name=answer] {
  font: inherit; font-size: 16px; color: var(--text); background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 12px; width: 100%; appearance: none; outline: none; transition: border-color .15s, box-shadow .15s; }
select { background-image: linear-gradient(45deg, transparent 50%, #999 50%), linear-gradient(135deg, #999 50%, transparent 50%);
  background-position: calc(100% - 18px) 55%, calc(100% - 13px) 55%; background-size: 5px 5px; background-repeat: no-repeat; padding-right: 32px; }
select:focus, input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(0,113,227,.15); }

.btn { font: inherit; font-size: 15px; font-weight: 400; border: 0; border-radius: 980px; padding: 10px 20px; background: #e8e8ed; color: var(--text); cursor: pointer; transition: background .15s, transform .1s; }
.btn:hover { background: #dcdce1; } .btn:active { transform: scale(.98); }
.btn.primary { background: var(--accent); color: #fff; } .btn.primary:hover { background: #0077ed; }
.btn.plain { background: transparent; color: var(--accent); padding-left: 6px; padding-right: 6px; }
.btn.small { font-size: 14px; }

.list { list-style: none; margin: 0; padding: 0; }
.num { font-weight: 500; margin-right: 6px; }
.tag { display: inline-block; font-size: 12px; font-weight: 400; padding: 2px 9px; border-radius: 980px; background: #f0f0f3; color: #3a3a3c; margin-right: 4px; }
.tag.diff-1 { background: #e6f6ec; color: #11743a; } .tag.diff-2 { background: #fff2e0; color: #9a4b00; } .tag.diff-3 { background: #fde8ea; color: #b0001a; }
.status { font-size: 12px; padding: 3px 10px; border-radius: 980px; background: #f0f0f3; color: var(--muted); white-space: nowrap; }
.st-solved { background: #e6f6ec; color: #11743a; } .st-solved_hints { background: #e7f0fd; color: #0a58ca; }
.st-solution { background: #efeff4; color: #48484a; } .st-in_progress { background: #fff2e0; color: #9a4b00; }
.preview { max-height: 3.3em; overflow: hidden; font-size: 15px; margin-top: 4px; }
.preview img:not(.tex) { display: none; } .preview p { display: inline; margin: 0; }

.task-title { font-size: 26px; font-weight: 600; letter-spacing: -0.02em; margin: 0 0 6px; }
.statement { font-size: 18px; margin: 18px 0 12px; }
.statement p, .solution p, .hint p { margin: 0 0 .6em; }
img.tex { vertical-align: middle; max-width: 100%; height: auto; zoom: 1.2; }
.statement img:not(.tex), .solution img:not(.tex), .figure { display: block; max-width: 100%; height: auto; margin: 12px auto; }
.answer-form { display: flex; gap: 8px; margin-bottom: 10px; }
.answer-form input { flex: 1; }
.note { background: #e7f0fd; color: #0a4fb3; padding: 8px 12px; border-radius: 12px; font-size: 14px; }
.attempts { list-style: none; padding: 0; margin: 6px 0 0; }
.hint { background: #f7f8fa; border-radius: 14px; padding: 12px 14px; margin: 0 0 10px; animation: fade .25s ease; }
.hint-level { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--accent); font-weight: 500; margin-bottom: 4px; }
.hint.locked { background: transparent; border: 1px dashed var(--line); color: #a1a1a6; font-size: 14px; }
@keyframes fade { from { opacity: 0; transform: translateY(-3px); } to { opacity: 1; transform: none; } }

.pager { display: flex; justify-content: space-between; align-items: center; margin: 22px 4px; }
.stat-num { font-size: 32px; font-weight: 300; letter-spacing: -0.02em; }
.bar-row { display: flex; justify-content: space-between; margin-top: 8px; }
.bar { height: 6px; background: #ececf0; border-radius: 99px; overflow: hidden; margin-top: 4px; }
.bar span { display: block; height: 100%; background: var(--accent); border-radius: 99px; }
.table { width: 100%; border-collapse: collapse; } .table th, .table td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); }
.table th { font-weight: 400; color: var(--muted); }
.card:has(.table) { overflow-x: auto; }

.toasts { position: sticky; top: 10px; z-index: 5; }
.toast { background: rgba(255,255,255,.9); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-radius: 14px; padding: 12px 16px; margin: 8px 0; box-shadow: 0 6px 20px rgba(0,0,0,.08); }
.toast-success { color: var(--ok); } .toast-error { color: var(--bad); } .toast-warning { color: var(--warn); } .toast-info { color: #0a4fb3; }

/* Док снизу по центру, как в macOS */
.dock { position: fixed; left: 50%; bottom: max(14px, env(safe-area-inset-bottom)); transform: translateX(-50%); z-index: 10;
  display: flex; align-items: flex-end; gap: 4px; padding: 8px 10px; border-radius: 24px;
  background: rgba(255,255,255,.72); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px);
  border: 1px solid rgba(255,255,255,.6); box-shadow: 0 10px 40px rgba(0,0,0,.12), inset 0 0 0 .5px rgba(0,0,0,.06); max-width: calc(100vw - 16px); }
.dock form { margin: 0; }
.dock-item { position: relative; display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 64px; padding: 6px 8px 8px;
  border: 0; background: transparent; font: inherit; color: var(--text); cursor: pointer; border-radius: 16px; transition: transform .18s cubic-bezier(.3,.7,.4,1.5), background .15s; }
.dock-item:hover:not([disabled]) { transform: translateY(-6px) scale(1.08); }
.dock-item[disabled] { opacity: .35; cursor: default; }
.dock-icon { width: 40px; height: 40px; display: grid; place-items: center; font-size: 21px; border-radius: 12px; background: linear-gradient(180deg, #fff, #f0f0f3); box-shadow: 0 1px 3px rgba(0,0,0,.12); }
.dock-label { font-size: 11px; color: var(--muted); font-weight: 400; }
.dock-item.active::after { content: ""; position: absolute; bottom: 0; width: 4px; height: 4px; border-radius: 50%; background: #1d1d1f; }
.dock-sep { width: 1px; align-self: stretch; margin: 6px 4px; background: rgba(0,0,0,.12); }

@media (max-width: 560px) {
  body { font-size: 16px; }
  .top .small { display: none; }
  .card { padding: 18px; }
  .dock { gap: 0; padding: 6px; border-radius: 20px; }
  .dock-item { min-width: 52px; padding: 4px 4px 6px; }
  .dock-icon { width: 34px; height: 34px; font-size: 18px; }
  .dock-label { font-size: 10px; }
  .answer-form { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; animation: none !important; } }

/* ===== Палитра в духе Duolingo (0.5.0). Текст на цветном фоне — тёмный, контраст ≥ 4.5:1 (WCAG AA) ===== */
:root {
  --bg: #F7F7F7; --text: #4B4B4B; --muted: #626262; --line: #E5E5E5;
  --green: #58CC02; --green-d: #58A700; --green-ink: #2B5F00; --green-t: #E9F9D9;
  --blue: #1CB0F6; --blue-d: #1899D6; --blue-ink: #0A5D84; --blue-t: #DDF4FF;
  --orange: #FF9600; --orange-d: #E08500; --orange-ink: #8A4B00; --orange-t: #FFF0DB;
  --red: #FF4B4B; --red-d: #EA2B2B; --red-ink: #B11A1A; --red-t: #FFE5E5;
  --yellow: #FFC800; --yellow-d: #E5B400; --yellow-ink: #6B5300; --yellow-t: #FFF6D1;
  --purple: #CE82FF; --purple-d: #A568CC; --purple-ink: #6A2E99; --purple-t: #F5E8FF;
  --accent: var(--blue-ink); --ok: var(--green-ink); --bad: var(--red-ink); --warn: var(--orange-ink);
}
body { background: var(--bg); color: var(--text); }
b, strong, h1, h2, h3, .page-title, .task-title { color: #3C3C3C; }
.brand { color: #2F7A00; font-weight: 700; letter-spacing: -0.01em; }
.hero h1 { color: #3C3C3C; } .hero h1 em, .hero h1 span { color: #3A8C00; }
.link, .btn.plain { color: var(--blue-ink); font-weight: 500; }
.card { border: 2px solid var(--line); box-shadow: none; }
.card.flat { background: #fff; }
.card.item:hover { transform: translateY(-2px); box-shadow: 0 4px 0 var(--line); }

/* Кнопки: «нажимаемые», с нижней тенью */
.btn { border-radius: 16px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; font-size: 14px; padding: 12px 20px;
  background: #fff; color: #4B4B4B; border: 2px solid var(--line); box-shadow: 0 4px 0 var(--line); transition: transform .08s, box-shadow .08s, filter .15s; }
.btn:hover { background: #fff; filter: brightness(.98); }
.btn:active { transform: translateY(4px); box-shadow: 0 0 0 var(--line); }
.btn.primary { background: var(--green); color: #1F4500; border-color: var(--green); box-shadow: 0 4px 0 var(--green-d); }
.btn.primary:hover { background: #61D80B; }
.btn.primary:active { box-shadow: 0 0 0 var(--green-d); }
.btn.plain { background: transparent; border: 0; box-shadow: none; text-transform: none; letter-spacing: 0; }
.answer-form .btn { min-width: 130px; }
select, input[type=text], input:not([type]), input[name=answer] { border: 2px solid var(--line); border-radius: 14px; background: #fff; }
select:focus, input:focus { border-color: var(--blue); box-shadow: 0 0 0 4px var(--blue-t); }
.segmented { background: #EDEDED; border-radius: 14px; }
.segmented input:checked + span { color: var(--blue-ink); font-weight: 700; box-shadow: 0 2px 0 var(--line); }

/* Карточки предметов */
.subject { border: 0; position: relative; overflow: hidden; transition: transform .1s, box-shadow .1s; }
.subject::after { content: ""; position: absolute; right: -36px; top: -36px; width: 160px; height: 160px; border-radius: 50%; background: rgba(255,255,255,.22); }
.subject-math { background: linear-gradient(135deg, #DDF4FF 0%, #B8E6FD 100%); box-shadow: 0 6px 0 #84D3FA; color: #0A5D84; }
.subject-physics { background: linear-gradient(135deg, #FFF0DB 0%, #FFD9A3 100%); box-shadow: 0 6px 0 #FFBE5C; color: #8A4B00; }
.subject .muted { color: inherit; opacity: .9; }
.subject-name { font-weight: 700; }
.subject-math .subject-icon { color: var(--blue); } .subject-physics .subject-icon { color: var(--orange); }
.subject:hover { transform: translateY(-2px); } .subject:active { transform: translateY(4px); box-shadow: 0 2px 0 rgba(0,0,0,.08); }

/* Бейджи */
.tag { font-weight: 700; border-radius: 10px; padding: 3px 9px; }
.tag.subj-math { background: var(--blue-t); color: var(--blue-ink); }
.tag.subj-physics { background: var(--orange-t); color: var(--orange-ink); }
.tag.exam-oge { background: var(--yellow-t); color: var(--yellow-ink); }
.tag.exam-ege { background: var(--purple-t); color: var(--purple-ink); }
.tag.diff-1 { background: var(--green-t); color: var(--green-ink); }
.tag.diff-2 { background: var(--yellow-t); color: var(--yellow-ink); }
.tag.diff-3 { background: var(--red-t); color: var(--red-ink); }
.status { font-weight: 700; }
.st-solved { background: var(--green-t); color: var(--green-ink); } .st-solved_hints { background: var(--blue-t); color: var(--blue-ink); }
.st-in_progress { background: var(--yellow-t); color: var(--yellow-ink); } .st-solution { background: var(--purple-t); color: var(--purple-ink); }
.card.item { border-left-width: 6px; }
.card.item.item-math { border-left-color: var(--blue); } .card.item.item-physics { border-left-color: var(--orange); }

/* Подсказки: светлые тона по уровням */
.hint { border: 2px solid transparent; }
.hint-1 { background: var(--blue-t); border-color: #B8E6FD; } .hint-1 .hint-level { color: var(--blue-ink); }
.hint-2 { background: var(--purple-t); border-color: #E8CCFF; } .hint-2 .hint-level { color: var(--purple-ink); }
.hint-3 { background: var(--yellow-t); border-color: #FFE68A; } .hint-3 .hint-level { color: var(--yellow-ink); }
.hint-level { font-weight: 700; }
.hint.locked { background: #fff; color: #6B6B6B; border-style: dashed; }
.solution-card { background: #E6FAF0; border-color: #A6EBC8; } .solution-card h2 { color: #136B43; }
.note { background: var(--yellow-t); color: var(--yellow-ink); font-weight: 500; }

/* Ответы */
.attempts li { display: inline-block; margin: 4px 4px 0 0; padding: 3px 12px; border-radius: 12px; font-weight: 700; }
.attempts li.ok { background: var(--green-t); color: var(--green-ink); }
.attempts li.bad { background: var(--red-t); color: var(--red-ink); }
.result-ok { background: var(--green-t); color: var(--green-ink); border: 2px solid var(--green); padding: 12px 16px; border-radius: 16px; font-weight: 700; }
.toast { border: 2px solid transparent; box-shadow: 0 4px 0 rgba(0,0,0,.06); font-weight: 700; }
.toast-success { color: var(--green-ink); background: var(--green-t); border-color: var(--green); }
.toast-error { color: var(--red-ink); background: var(--red-t); border-color: var(--red); }
.toast-warning { color: var(--yellow-ink); background: var(--yellow-t); border-color: var(--yellow); }
.toast-info { color: var(--blue-ink); background: var(--blue-t); border-color: var(--blue); }

/* Прогресс */
.stat-num { font-weight: 700; }
.stat:nth-child(1) .stat-num { color: var(--green-ink); } .stat:nth-child(2) .stat-num { color: var(--blue-ink); }
.stat:nth-child(3) .stat-num { color: var(--orange-ink); } .stat:nth-child(4) .stat-num { color: var(--purple-ink); }
.stat:nth-child(1) { border-color: var(--green); } .stat:nth-child(2) { border-color: var(--blue); }
.stat:nth-child(3) { border-color: var(--orange); } .stat:nth-child(4) { border-color: var(--purple); }
.bar { height: 12px; background: #E5E5E5; } .bar span { background: var(--green); box-shadow: inset 0 -3px 0 rgba(0,0,0,.08); }
.group { color: var(--blue-ink); font-weight: 700; }

/* Док: яркие иконки */
.dock { border: 2px solid var(--line); background: rgba(255,255,255,.92); }
.dock-icon { color: #fff; font-weight: 700; border-radius: 12px; text-shadow: 0 1px 0 rgba(0,0,0,.18); }
.di-home { background: var(--green); box-shadow: 0 3px 0 var(--green-d); }
.di-list { background: var(--blue); box-shadow: 0 3px 0 var(--blue-d); }
.di-rand { background: var(--purple); box-shadow: 0 3px 0 var(--purple-d); }
.di-prog { background: var(--orange); box-shadow: 0 3px 0 var(--orange-d); }
.di-hint { background: var(--yellow); box-shadow: 0 3px 0 var(--yellow-d); }
.di-sol  { background: var(--green); box-shadow: 0 3px 0 var(--green-d); }
.dock-label { color: #5A5A5A; font-weight: 700; }
.dock-item:hover:not([disabled]) { background: #F2F2F2; }
.dock-item.active .dock-label { color: var(--green-ink); }
.dock-item.active::after { background: var(--green); width: 6px; height: 6px; }

/* ===== Анимации (0.5.0) ===== */
.banner-ok, .banner-bad { animation: slideup .35s cubic-bezier(.2,.9,.3,1.3) both; }
@keyframes slideup { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
.bounce { animation: bounce .6s cubic-bezier(.3,.7,.4,1.5); }
@keyframes bounce { 0% { transform: scale(1); } 30% { transform: scale(1.03); } 55% { transform: scale(.985); } 100% { transform: scale(1); } }
.shake { animation: shake .45s ease; }
@keyframes shake { 0%,100% { transform: none; } 20% { transform: translateX(-8px); } 40% { transform: translateX(7px); } 60% { transform: translateX(-5px); } 80% { transform: translateX(3px); } }
.reveal { animation: reveal .4s cubic-bezier(.2,.9,.3,1.2) both; }
@keyframes reveal { from { opacity: 0; transform: translateY(-10px) scale(.97); } to { opacity: 1; transform: none; } }
.confetti { position: fixed; z-index: 50; width: 0; height: 0; pointer-events: none; }
.confetti i { position: absolute; width: 8px; height: 12px; border-radius: 2px; animation: burst 1.1s cubic-bezier(.15,.7,.3,1) forwards; }
@keyframes burst { from { transform: translate(0,0) rotate(0); opacity: 1; } 70% { opacity: 1; } to { transform: translate(var(--dx), calc(var(--dy) + 120px)) rotate(var(--rot)); opacity: 0; } }
.dock-item:active:not([disabled]) .dock-icon { transform: translateY(3px); box-shadow: 0 0 0 transparent; }
.dock-icon { transition: transform .08s, box-shadow .08s; }
.di-sound { background: var(--blue); box-shadow: 0 3px 0 var(--blue-d); }
#sound-toggle.muted .di-sound { background: #AFAFAF; box-shadow: 0 3px 0 #8F8F8F; }
.dock-label { white-space: nowrap; }
@media (max-width: 560px) { .dock-item { min-width: 44px; padding: 4px 2px 6px; } .dock-sep { margin: 6px 1px; } .dock-label { font-size: 9px; } }
@media (prefers-reduced-motion: reduce) { .banner-ok, .banner-bad, .bounce, .shake, .reveal { animation: none !important; } .confetti { display: none; } }

/* ===== Алгоритм решения (0.6.0) ===== */
.algo { padding: 0; border-color: #B8E6FD; overflow: hidden; }
.algo-head { list-style: none; display: flex; align-items: center; gap: 14px; padding: 16px 20px; cursor: pointer; user-select: none; }
.algo-head::-webkit-details-marker { display: none; }
.algo-head:hover { background: #F4FBFF; }
.algo-icon { width: 44px; height: 44px; flex: none; display: grid; place-items: center; font-size: 22px; border-radius: 14px; background: var(--blue); box-shadow: 0 4px 0 var(--blue-d); transition: transform .08s, box-shadow .08s; }
.algo-head:active .algo-icon { transform: translateY(4px); box-shadow: 0 0 0 var(--blue-d); }
.algo-titles { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.algo-name { font-weight: 700; font-size: 17px; color: var(--blue-ink); text-transform: uppercase; letter-spacing: .04em; }
.algo-sub { font-size: 14px; color: var(--muted); }
.algo-chevron { font-size: 26px; color: var(--blue-ink); transition: transform .2s; }
.algo[open] .algo-chevron { transform: rotate(90deg); }
.algo[open] .algo-head { border-bottom: 2px solid #DDF4FF; }
.algo-body { padding: 6px 20px 20px; }
.algo[open] .algo-body { animation: reveal .35s cubic-bezier(.2,.9,.3,1.2) both; }
.algo-h { margin: 14px 0 6px; font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--blue-ink); font-weight: 700; }
.algo-terms { margin: 0; padding-left: 20px; } .algo-terms li { margin: 4px 0; }
.algo-steps { margin: 0; padding-left: 0; list-style: none; counter-reset: st; }
.algo-steps li { counter-increment: st; position: relative; padding: 4px 0 4px 38px; margin: 4px 0; }
.algo-steps li::before { content: counter(st); position: absolute; left: 0; top: 3px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  background: var(--green); color: #1F4500; font-weight: 700; font-size: 13px; box-shadow: 0 2px 0 var(--green-d); }
.algo-example { margin-top: 16px; background: var(--yellow-t); border: 2px solid #FFE68A; border-radius: 16px; padding: 14px 16px; }
.algo-example .algo-steps li::before { background: var(--yellow); color: #4A3A00; box-shadow: 0 2px 0 var(--yellow-d); }
.algo-ex-label { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--yellow-ink); font-weight: 700; margin-bottom: 6px; }
.algo-answer { margin: 10px 0 0; color: var(--yellow-ink); }
@media (max-width: 560px) { .algo-head { padding: 14px; } .algo-body { padding: 4px 14px 16px; } }

/* ===== Личный кабинет и окно сохранения (0.7.0) ===== */
.top-right { display: flex; align-items: center; gap: 14px; }
.acc-chip { font-size: 14px; font-weight: 700; color: var(--blue-ink); background: #fff; border: 2px solid var(--line); border-radius: 14px; padding: 6px 12px; box-shadow: 0 3px 0 var(--line); max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acc-chip:active { transform: translateY(3px); box-shadow: none; }
.auth { max-width: 520px; margin: 24px auto; }
.auth-form { display: flex; flex-direction: column; gap: 12px; margin-top: 10px; }
.auth-form input[name=code] { font-size: 28px; letter-spacing: .4em; text-align: center; font-weight: 700; }
.lbl { font-weight: 700; font-size: 14px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--muted); }
.check input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--green); flex: none; }
.err { color: var(--red-ink); background: var(--red-t); border-radius: 10px; padding: 6px 10px; margin: 0; font-size: 14px; font-weight: 500; }
.btn.wide { width: 100%; display: block; text-align: center; }
.acc-email { font-size: 20px; font-weight: 700; color: #3C3C3C; word-break: break-all; }
.prose h2 { margin-top: 18px; }
.modal-bg { position: fixed; inset: 0; z-index: 40; background: rgba(40,40,40,.45); display: grid; place-items: center; padding: 16px; animation: fadebg .2s ease; }
.modal { background: #fff; border-radius: 24px; padding: 28px 24px 18px; max-width: 400px; width: 100%; text-align: center; border: 2px solid var(--line); box-shadow: 0 8px 0 rgba(0,0,0,.08); animation: slideup .35s cubic-bezier(.2,.9,.3,1.3) both; }
.modal-emoji { font-size: 52px; line-height: 1; margin-bottom: 8px; }
.modal h2 { font-size: 22px; color: var(--green-ink); }
.modal p { color: var(--muted); }
.modal-later { margin-top: 8px; }
@keyframes fadebg { from { opacity: 0; } to { opacity: 1; } }
@media (max-width: 560px) { .top-tag { display: none; } .acc-chip { max-width: 160px; } }
@media (prefers-reduced-motion: reduce) { .modal, .modal-bg { animation: none !important; } }