:root {
  --bg: #f5f7fb; --card: #ffffff; --text: #1e2433; --muted: #6b7280; --line: #e5e8f0;
  --primary: #4f6bed; --primary-dark: #3d55c9; --primary-soft: #e8ecfd;
  --ok: #2fa36b; --ok-soft: #e4f6ec; --err: #e05a4e; --err-soft: #fdeceb; --warn: #d98c1f; --warn-soft: #fff3e0;
  --radius: 16px; --shadow: 0 2px 12px rgba(30, 36, 51, 0.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; font-size: 17px; line-height: 1.45; -webkit-text-size-adjust: 100%; }
.app { max-width: 680px; margin: 0 auto; padding: 16px 16px calc(24px + env(safe-area-inset-bottom)); min-height: 100vh; }
.loading { text-align: center; color: var(--muted); padding: 40px 0; }
h1 { font-size: 26px; margin: 8px 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 20px 0 10px; }
h3 { font-size: 17px; margin: 16px 0 8px; }
p { margin: 8px 0; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; margin: 12px 0; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 14px; padding: 14px 20px; font-size: 17px; font-weight: 600; cursor: pointer; background: var(--primary); color: #fff; width: 100%; transition: transform .05s, background .15s; -webkit-tap-highlight-color: transparent; }
.btn:active { transform: scale(0.99); }
.btn:disabled { opacity: .5; cursor: default; }
.btn.secondary { background: var(--primary-soft); color: var(--primary-dark); }
.btn.ghost { background: transparent; color: var(--primary-dark); }
.btn.danger { background: var(--err); }
.btn.small { padding: 9px 14px; font-size: 15px; width: auto; border-radius: 10px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > .btn { flex: 1; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.topbar .title { font-weight: 700; }
.progress { height: 10px; background: var(--line); border-radius: 999px; overflow: hidden; }
.progress > div { height: 100%; background: linear-gradient(90deg, var(--primary), #7c8ff5); border-radius: 999px; transition: width .4s; }
.dayline { display: flex; gap: 6px; margin: 10px 0; }
.dayline .seg { flex: 1; height: 8px; border-radius: 999px; background: var(--line); }
.dayline .seg.done { background: var(--ok); }
.dayline .seg.current { background: var(--primary); }
.days { display: grid; gap: 10px; }
.day { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px; background: var(--card); box-shadow: var(--shadow); }
.day .num { width: 40px; height: 40px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-weight: 700; background: var(--line); color: var(--muted); flex-shrink: 0; }
.day.done .num { background: var(--ok-soft); color: var(--ok); }
.day.current .num { background: var(--primary-soft); color: var(--primary-dark); }
.day .t { font-weight: 600; }
.day .s { color: var(--muted); font-size: 14px; }
.task-q { font-size: 18px; font-weight: 600; margin: 4px 0 12px; }
.task-text { font-size: 20px; line-height: 1.7; background: #fafbff; border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin-bottom: 14px; white-space: pre-wrap; }
.task-text.plain { font-size: 17px; line-height: 1.55; }
.gap-input { display: inline-block; width: 2.2ch; min-width: 34px; text-align: center; font-size: 20px; font-weight: 700; border: 0; border-bottom: 3px solid var(--primary); background: var(--primary-soft); border-radius: 6px 6px 0 0; padding: 2px 4px; margin: 0 2px; color: var(--primary-dark); font-family: inherit; }
.gap-input.wide { width: 4.5ch; min-width: 56px; }
.gap-input:focus { outline: none; border-bottom-color: var(--primary-dark); }
.gap-input.none { background: var(--warn-soft); border-bottom-color: var(--warn); }
.slot { display: inline-block; vertical-align: baseline; margin: 0 2px; }
.slot select { font-size: 16px; font-weight: 600; padding: 4px 6px; border-radius: 8px; border: 2px solid var(--primary); background: var(--primary-soft); color: var(--primary-dark); font-family: inherit; }
.slot select.unset { border-style: dashed; color: var(--muted); background: #fff; }
.options { display: grid; gap: 8px; }
.opt { text-align: left; padding: 12px 14px; border-radius: 12px; border: 2px solid var(--line); background: #fff; font-size: 17px; cursor: pointer; font-family: inherit; color: var(--text); width: 100%; }
.opt.selected { border-color: var(--primary); background: var(--primary-soft); }
.input { width: 100%; font-size: 18px; padding: 12px 14px; border: 2px solid var(--line); border-radius: 12px; font-family: inherit; color: var(--text); background: #fff; }
.input:focus { outline: none; border-color: var(--primary); }
textarea.input { min-height: 90px; resize: vertical; }
.field { display: grid; gap: 6px; margin-bottom: 12px; }
.field label { font-weight: 600; font-size: 15px; }
.field select { font-size: 17px; padding: 10px 12px; border-radius: 12px; border: 2px solid var(--line); background: #fff; font-family: inherit; color: var(--text); }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg button { padding: 8px 12px; border-radius: 999px; border: 2px solid var(--line); background: #fff; font-family: inherit; font-size: 15px; cursor: pointer; color: var(--text); }
.seg button.on { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); font-weight: 600; }
.classify-item { display: grid; gap: 6px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.classify-item .w { font-weight: 600; font-size: 18px; }
.order-list { display: grid; gap: 8px; }
.order-item { padding: 10px 12px; border-radius: 12px; border: 2px solid var(--line); background: #fff; cursor: pointer; display: flex; gap: 10px; align-items: flex-start; font-family: inherit; font-size: 16px; text-align: left; color: var(--text); }
.order-item .n { width: 26px; height: 26px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; font-size: 14px; }
.order-item.picked { border-color: var(--primary); background: var(--primary-soft); }
.feedback { border-radius: var(--radius); padding: 16px 18px; margin: 12px 0; }
.feedback.ok { background: var(--ok-soft); border: 1px solid #bfe6cf; }
.feedback.err { background: var(--err-soft); border: 1px solid #f5c7c2; }
.feedback .h { font-weight: 700; font-size: 18px; margin-bottom: 6px; }
.feedback .ans { font-size: 18px; margin: 6px 0; }
.rule { background: #fff; border-radius: 12px; padding: 12px 14px; margin-top: 10px; border: 1px solid var(--line); }
.rule .t { font-weight: 700; margin-bottom: 4px; color: var(--primary-dark); }
.rule .ex { color: var(--muted); font-size: 15px; margin-top: 6px; }
.parts { margin: 8px 0; padding: 0; list-style: none; }
.parts li { padding: 6px 0; border-top: 1px dashed var(--line); font-size: 15px; }
.parts li.bad { color: #9b2d23; }
.parts li.good { color: #1f6f48; }
.hint { background: var(--warn-soft); border-radius: 12px; padding: 10px 14px; font-size: 15px; margin: 10px 0; }
.banner { position: fixed; left: 0; right: 0; bottom: 0; background: #1e2433; color: #fff; padding: 12px 16px; display: flex; justify-content: space-between; align-items: center; gap: 12px; z-index: 10; }
.banner .btn { width: auto; }
.center { text-align: center; }
.big { font-size: 48px; margin: 10px 0; }
.footer { text-align: center; margin-top: 30px; }
.footer a { color: var(--muted); font-size: 14px; text-decoration: none; }
/* родитель */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 10px; }
.stat { background: var(--card); border-radius: 12px; padding: 12px; box-shadow: var(--shadow); }
.stat .v { font-size: 24px; font-weight: 700; }
.stat .l { font-size: 13px; color: var(--muted); }
.bars { display: grid; gap: 8px; }
.bar { display: grid; grid-template-columns: 130px 1fr 48px; align-items: center; gap: 8px; font-size: 14px; }
.bar .track { height: 12px; background: var(--line); border-radius: 999px; overflow: hidden; }
.bar .fill { height: 100%; border-radius: 999px; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.st-STRONG { background: var(--ok-soft); color: #1f6f48; }
.st-MOSTLY_STRONG { background: #e7f1ec; color: #2c6e4c; }
.st-UNSTABLE { background: var(--warn-soft); color: #9a5b00; }
.st-WEAK { background: #fde5dc; color: #a13b2b; }
.st-CRITICAL_GAP { background: #f6c9c4; color: #7f1d13; }
.st-NOT_TESTED { background: var(--line); color: var(--muted); }
.skill-row { border-top: 1px solid var(--line); padding: 10px 0; }
.skill-row .head { display: flex; justify-content: space-between; gap: 10px; align-items: center; cursor: pointer; }
.skill-row .head .name { font-weight: 600; font-size: 15px; }
.skill-row .meta { color: var(--muted); font-size: 13px; }
.skill-row .details { margin-top: 8px; font-size: 14px; }
.history li { margin: 6px 0; padding: 8px; border-radius: 8px; background: #fafbff; border: 1px solid var(--line); }
.history li.bad { border-color: #f5c7c2; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 10px 0; }
.tabs button { padding: 8px 12px; border-radius: 999px; border: 1px solid var(--line); background: #fff; font-family: inherit; font-size: 14px; cursor: pointer; }
.tabs button.on { background: var(--primary); color: #fff; border-color: var(--primary); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; }
table.tbl td, table.tbl th { padding: 6px 8px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
details summary { cursor: pointer; font-weight: 600; }
@media (max-width: 420px) { html, body { font-size: 16px; } .task-text { font-size: 19px; } .bar { grid-template-columns: 100px 1fr 44px; } }
/* ── тренажёр ── */
.login-card { max-width: 420px; margin: 40px auto; }
.login-card .who { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.stepper { counter-reset: st; padding-left: 0; list-style: none; margin: 8px 0; }
.stepper li { counter-increment: st; position: relative; padding: 6px 0 6px 34px; }
.stepper li::before { content: counter(st); position: absolute; left: 0; top: 5px; width: 24px; height: 24px; border-radius: 50%; background: var(--primary-soft); color: var(--primary-dark); font-weight: 700; font-size: 13px; display: flex; align-items: center; justify-content: center; }
.example { background: #fafbff; border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; margin: 8px 0; }
.example .t { font-weight: 600; }
.example .e { color: var(--muted); font-size: 15px; margin-top: 4px; }
.hintbox { background: var(--primary-soft); color: var(--primary-dark); border-radius: 12px; padding: 10px 12px; font-size: 15px; margin-bottom: 12px; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 999px; background: var(--line); color: var(--muted); margin-bottom: 6px; }
.badge.check { background: var(--warn-soft); color: #9a5b00; }
.badge.control { background: #ece8fd; color: #5b3fc4; }
.badge.review { background: var(--ok-soft); color: #1f6f48; }
.skill-line { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); }
.skill-line:first-child { border-top: 0; }
.skill-line .n { font-size: 15px; }
.skill-line .mini { height: 6px; background: var(--line); border-radius: 999px; overflow: hidden; margin-top: 4px; }
.skill-line .mini > div { height: 100%; background: var(--primary); }
.pill { font-size: 12px; font-weight: 600; padding: 3px 9px; border-radius: 999px; white-space: nowrap; }
.pill.new { background: var(--line); color: var(--muted); }
.pill.practice { background: var(--primary-soft); color: var(--primary-dark); }
.pill.check { background: var(--warn-soft); color: #9a5b00; }
.pill.mastered { background: var(--ok-soft); color: #1f6f48; }
.dict-part { padding: 10px 0; border-top: 1px dashed var(--line); font-size: 19px; line-height: 1.8; }
.dict-part:first-child { border-top: 0; }
.event { background: var(--ok-soft); border-radius: 12px; padding: 10px 14px; margin: 8px 0; font-weight: 600; }
.event.warn { background: var(--warn-soft); }
.muted-link { color: var(--muted); font-size: 14px; text-decoration: none; }
.settings-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin: 8px 0; }
.settings-row label { font-size: 15px; }
.settings-row select { font-size: 15px; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--line); }
.scroll-x { overflow-x: auto; }