/* ============================================================
   shellkata — стили. Палитра и метрики взяты из макета.
   ============================================================ */

:root {
  --paper:       #f4f1ea;
  --surface:     #faf8f3;
  --ink:         #1b1a17;
  --ink-2:       #33302a;
  --muted:       #6b665b;
  --muted-2:     #8d8878;
  --line:        #ddd7c9;
  --line-soft:   #e6e0d3;
  --line-softer: #efeade;
  --hover:       #efebe0;
  --code-bg:     #ece7db;

  --accent:      #a8502a;
  --accent-dark: #8f4222;
  --accent-link: #7d3a1d;
  --accent-tint: #f8ece4;
  --accent-tint-2:#f6e6dc;
  --accent-line: #e3c8b6;
  --accent-soft: #fdf4ee;

  --green:       #4d7a4a;
  --green-bg:    #eef5ec;
  --green-line:  #cadcc7;
  --violet:      #8d5a8d;
  --violet-bg:   #f4ecf4;
  --violet-line: #dcc8dc;

  --term-bar:    #22252a;
  --term-body:   #17181a;
  --term-foot:   #1d1f22;
  --term-edge:   #2a2c30;
  --term-edge-2: #2f3238;
  --term-fg:     #d8d5cd;
  --term-dim:    #a9a6a0;
  --term-grey:   #6b7078;
  --term-grey-2: #8a8f97;
  --term-green:  #7dd3a0;
  --term-blue:   #79a6d2;
  --term-yellow: #e8c07d;

  --sans: 'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --serif: Spectral, Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-link); text-decoration: underline; }
::selection { background: #e4d9c4; }

@keyframes blink { 0%, 49% { opacity: 1 } 50%, 100% { opacity: 0 } }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 3px; }

.mono { font-family: var(--mono); }

/* ---------------------------------------------------------- шапка */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 40px;
  height: 68px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 20;
}

.hdr-left { display: flex; align-items: center; gap: 40px; min-width: 0; }

.brand {
  display: flex;
  align-items: baseline;
  gap: 2px;
  font-family: var(--mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  white-space: nowrap;
}
.brand:hover { text-decoration: none; color: var(--ink); }
.brand-tilde { color: var(--accent); }
.brand-cursor {
  width: 8px; height: 16px;
  background: var(--accent);
  display: inline-block;
  margin-left: 4px;
  animation: blink 1.1s steps(1) infinite;
}

.nav { display: flex; gap: 4px; }
.nav-btn {
  font: inherit;
  font-size: 14px;
  padding: 7px 14px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: none;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
}
.nav-btn:hover { background: var(--hover); color: var(--ink); text-decoration: none; }
.nav-btn.is-active { background: var(--hover); color: var(--ink); }

.hdr-right { display: flex; align-items: center; gap: 14px; }

.chip-mono {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 5px 9px;
  background: var(--paper);
  white-space: nowrap;
}

.hdr-user { position: relative; display: flex; align-items: center; }
.hdr-skeleton {
  display: block; width: 108px; height: 30px;
  border-radius: 5px; background: var(--line-soft);
  opacity: .6;
}
.btn-login {
  font: inherit; font-size: 14px; font-weight: 500;
  padding: 7px 16px;
  border: 1px solid var(--accent);
  border-radius: 5px;
  background: var(--accent);
  color: var(--surface);
  cursor: pointer;
  white-space: nowrap;
}
.btn-login:hover { background: var(--accent-dark); color: var(--surface); text-decoration: none; }

.user {
  display: flex; align-items: center; gap: 9px;
  font: inherit; padding: 4px 6px 4px 4px;
  background: none; border: 1px solid transparent; border-radius: 6px;
  cursor: pointer; color: inherit;
}
.user:hover { background: var(--hover); }
.user-caret { font-size: 10px; color: var(--muted-2); }

.menu-pop {
  position: absolute; top: calc(100% + 8px); right: 0;
  min-width: 210px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 40px -22px rgba(27, 26, 23, .5);
  padding: 6px;
  z-index: 30;
}
.menu-head {
  font-family: var(--mono); font-size: 11px; color: var(--muted-2);
  padding: 8px 10px 10px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 6px;
  overflow-wrap: anywhere;
}
.menu-item {
  display: block; width: 100%; text-align: left;
  font: inherit; font-size: 14px;
  padding: 8px 10px; border: none; border-radius: 5px;
  background: none; color: var(--ink); cursor: pointer;
}
.menu-item:hover { background: var(--hover); text-decoration: none; color: var(--ink); }
.menu-item.danger { color: var(--accent); }
.avatar {
  width: 30px; height: 30px;
  object-fit: cover;
  border-radius: 50%;
  background: #1f2124;
  color: #e8e4d9;
  font-family: var(--mono);
  font-size: 12px;
  display: grid;
  place-items: center;
  flex: none;
}
.user-name { font-size: 14px; font-weight: 500; }

/* ---------------------------------------------------------- каркас */

.app { flex: 1; display: flex; flex-direction: column; }

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  padding: 22px 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted-2);
}
.foot-links { display: flex; gap: 22px; }
.site-footer a { color: var(--muted-2); }
.site-footer a:hover { color: var(--accent); }

.display {
  font-family: var(--serif);
  font-size: 38px;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
}
.lede { margin: 0; font-size: 15px; color: var(--muted); max-width: 56ch; text-wrap: pretty; }

.block-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted-2);
}

/* ---------------------------------------------------------- каталог */

.aside-wrap { min-width: 0; }
.aside-toggle {
  display: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  cursor: pointer;
  list-style: none;
  margin-bottom: 18px;
}
.aside-toggle::-webkit-details-marker { display: none; }
.aside-toggle::after { content: ' ▾'; }
details[open] > .aside-toggle::after { content: ' ▴'; }

.layout-catalog {
  flex: 1;
  display: grid;
  grid-template-columns: 236px minmax(0, 1fr);
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
  gap: 56px;
  padding: 44px 40px 80px;
}

.aside { display: flex; flex-direction: column; gap: 32px; align-content: start; min-width: 0; }
.filter-group .block-label { display: block; margin-bottom: 12px; }
.filter-list { display: flex; flex-direction: column; gap: 2px; }

.opt {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
  padding: 5px 0;
  cursor: pointer;
  color: var(--muted);
}
.opt.is-on { color: var(--ink); }
.opt input { accent-color: var(--accent); width: 14px; height: 14px; flex: none; }
.opt .count { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--muted-2); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  color: var(--muted);
  border-radius: 3px;
  background: none;
  cursor: pointer;
}
.tag:hover { border-color: var(--muted-2); }
.tag.is-on { border-color: var(--accent); color: var(--accent); background: var(--accent-tint); }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
  padding-bottom: 20px;
  margin-bottom: 8px;
}
.section-tools { display: flex; gap: 8px; align-items: center; }

.input-mono {
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  width: 190px;
  color: var(--ink);
}
.input-mono::placeholder { color: var(--muted-2); }
.select {
  font: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

.table-cols { grid-template-columns: 64px 1fr 168px 116px 92px; }

.table-head {
  display: grid;
  gap: 0 20px;
  padding: 12px 12px 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.rows { display: flex; flex-direction: column; }
.rows .row:last-child { border-bottom: 1px solid var(--line-soft); }

.row {
  display: grid;
  gap: 0 20px;
  align-items: center;
  padding: 15px 12px;
  border-top: 1px solid var(--line-soft);
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
  background: none;
  border-left: none; border-right: none; border-bottom: none;
  width: 100%;
}
.row:hover { background: var(--surface); }
.row.is-solved { background: var(--surface); }
.row.is-solved:hover { background: #fff; }
.row.is-current {
  background: var(--accent-tint);
  box-shadow: inset 3px 0 0 var(--accent);
}
.row.is-current:hover { background: var(--accent-tint-2); }

.lvl {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  border-radius: 3px;
  padding: 3px 0;
  text-align: center;
  display: block;
}
.lvl-1, .lvl-2 { color: var(--green); border: 1px solid var(--green-line); background: var(--green-bg); }
.lvl-3        { color: var(--accent); border: 1px solid var(--accent-line); background: var(--accent-tint); }
.lvl-4, .lvl-5 { color: var(--violet); border: 1px solid var(--violet-line); background: var(--violet-bg); }

.row-title { font-size: 16px; font-weight: 500; margin-bottom: 3px; }
.row-sum { font-size: 13px; color: var(--muted); }
.row-meta-sm { display: none; font-family: var(--mono); font-size: 12px; color: var(--muted-2); margin-top: 6px; }
.row-topics { font-family: var(--mono); font-size: 12px; color: var(--muted); }
.row-rate { font-family: var(--mono); font-size: 13px; color: var(--ink); }
.row-mark { font-family: var(--mono); font-size: 12px; color: var(--green); text-align: right; }

.btn-accent {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 10px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--surface);
  border-radius: 4px;
  cursor: pointer;
  justify-self: end;
}
.btn-accent:hover { background: var(--accent-dark); }

.btn-quiet {
  font-family: var(--mono);
  font-size: 13px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  border-radius: 5px;
  cursor: pointer;
}
.btn-quiet:hover { border-color: var(--muted-2); }

.more-wrap { display: flex; justify-content: center; margin-top: 28px; }
.empty {
  padding: 44px 12px;
  border-top: 1px solid var(--line-soft);
  color: var(--muted);
  font-size: 15px;
  text-align: center;
}

/* ---------------------------------------------------------- задание */

.layout-task {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  max-width: 1500px;
  width: 100%;
  margin: 0 auto;
}

.task-pane {
  min-width: 0;
  padding: 40px 44px 72px;
  border-right: 1px solid var(--line);
  max-width: 720px;
  justify-self: end;
  width: 100%;
}
.work-pane { min-width: 0; padding: 40px 44px 72px; max-width: 780px; width: 100%; }

.crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted-2);
  margin-bottom: 22px;
  flex-wrap: wrap;
}
.crumbs .here { color: var(--ink); }

.badges { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.badge-lvl {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  border-radius: 3px;
  padding: 3px 9px;
}
.badge-meta { font-family: var(--mono); font-size: 12px; color: var(--muted-2); }

.display-lg {
  font-family: var(--serif);
  font-size: 40px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0 0 22px;
}

.prose { font-size: 16px; line-height: 1.65; color: var(--ink-2); max-width: 64ch; text-wrap: pretty; }
.prose p { margin: 0 0 16px; }
.prose strong { font-weight: 600; }
code.inline {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--code-bg);
  padding: 2px 5px;
  border-radius: 3px;
}

.task-block { border-top: 1px solid var(--line); margin-top: 28px; padding-top: 24px; }
.task-block:first-of-type { margin-top: 32px; }
.task-block .block-label { display: block; margin-bottom: 14px; }

pre.expected {
  font-family: var(--mono);
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 14px 16px;
  margin: 0;
  color: var(--ink);
  overflow-x: auto;
}

ul.rules { margin: 0; padding-left: 20px; font-size: 15px; line-height: 1.75; color: var(--ink-2); }
ul.rules code.inline { font-size: 13px; }

.task-actions {
  border-top: 1px solid var(--line);
  margin-top: 28px;
  padding-top: 20px;
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}
.link-btn {
  font: inherit;
  font-size: 14px;
  background: none;
  border: none;
  padding: 0;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.link-btn:disabled { color: var(--muted-2); cursor: default; text-decoration: none; }
.muted-note { font-size: 13px; color: var(--muted-2); }

.hints { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.hint {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  background: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  padding: 11px 14px;
}
.hint code { font-family: var(--mono); font-size: 13px; background: var(--code-bg); padding: 1px 4px; border-radius: 3px; }

/* ---------------------------------------------------------- терминал */

.term {
  display: flex;
  flex-direction: column;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--term-edge);
  box-shadow: 0 18px 40px -22px rgba(27, 26, 23, 0.45);
}

.term-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--term-bar);
  padding: 10px 14px;
  border-bottom: 1px solid var(--term-edge-2);
}
.dots { display: flex; gap: 6px; }
.dots span { width: 10px; height: 10px; border-radius: 50%; background: #3b3f45; }
.term-title { font-family: var(--mono); font-size: 12px; color: var(--term-grey-2); margin-left: 6px; }
.term-status { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--term-green); }
.term-status.is-busy { color: var(--term-yellow); }

.term-body {
  background: var(--term-body);
  padding: 18px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.75;
  min-height: 340px;
  max-height: 46vh;
  color: var(--term-fg);
  overflow: auto;
  cursor: text;
}
.term-body .g { color: var(--term-green); }
.term-body .b { color: var(--term-blue); }
.term-body .d { color: var(--term-grey); }
.term-body .y { color: var(--term-yellow); }
.term-body .out { color: var(--term-dim); white-space: pre-wrap; }
.term-body .err { color: #e07a6b; white-space: pre-wrap; }
.term-line { white-space: pre-wrap; word-break: break-word; }
.term-line + .term-prompt { margin-top: 10px; }
.term-gap { margin-top: 10px; }

.term-input {
  font: inherit;
  color: var(--term-fg);
  background: none;
  border: none;
  outline: none;
  padding: 0;
  width: 60%;
  min-width: 40px;
  caret-color: transparent;
}
.term-caret {
  display: inline-block;
  width: 8px; height: 16px;
  background: var(--term-fg);
  vertical-align: -3px;
  margin-left: 2px;
  animation: blink 1.1s steps(1) infinite;
}

.term-foot {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--term-foot);
  padding: 12px 14px;
  border-top: 1px solid var(--term-edge-2);
  flex-wrap: wrap;
}
.btn-run {
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 16px;
  border: none;
  border-radius: 5px;
  background: var(--term-green);
  color: #14261c;
  font-weight: 700;
  cursor: pointer;
}
.btn-run:hover { background: #6cc290; }
.btn-dark {
  font-family: var(--mono);
  font-size: 13px;
  padding: 8px 14px;
  border: 1px solid #3b3f45;
  border-radius: 5px;
  background: none;
  color: var(--term-dim);
  cursor: pointer;
}
.btn-dark:hover { border-color: #5c6067; color: var(--term-fg); }
.attempts { margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--term-grey); }

/* ---------------------------------------------------------- проверки */

.checks {
  margin-top: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  overflow: hidden;
}
.checks-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-soft);
}
.checks-verdict { font-family: var(--mono); font-size: 12px; color: var(--green); }
.checks-verdict.is-fail { color: var(--accent); }
.checks-list { display: flex; flex-direction: column; }
.check-item {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-softer);
}
.check-item:last-child { border-bottom: none; }
.check-item .sign { font-family: var(--mono); }
.check-item.ok .sign { color: var(--green); }
.check-item.fail { background: var(--accent-soft); }
.check-item.fail .sign { color: var(--accent); }
.check-item.skip { color: var(--muted-2); }
.check-title { font-size: 14px; font-weight: 500; }
.check-item.fail .check-title { margin-bottom: 5px; }
.check-diff {
  font-family: var(--mono);
  font-size: 13px;
  margin: 0;
  color: var(--muted);
  white-space: pre-wrap;
}
.checks-idle { padding: 22px 16px; font-size: 14px; color: var(--muted); }

.solved-banner {
  margin-top: 24px;
  border: 1px solid var(--green-line);
  background: var(--green-bg);
  border-radius: 8px;
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.solved-banner .title { font-size: 15px; font-weight: 600; color: var(--green); }
.solved-banner .sub { font-size: 13px; color: var(--ink-2); }
.solved-banner .btn-accent { justify-self: auto; margin-left: auto; }

/* ---------------------------------------------------------- профиль */

.layout-narrow {
  flex: 1;
  min-width: 0;
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 44px 40px 80px;
}

.profile-head {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 32px;
  flex-wrap: wrap;
}
.avatar-lg {
  width: 76px; height: 76px;
  border-radius: 50%;
  background: #1f2124;
  color: #e8e4d9;
  font-family: var(--mono);
  font-size: 26px;
  display: grid;
  place-items: center;
  flex: none;
}
.profile-id { flex: 1; min-width: 220px; }
.profile-id h1 { font-family: var(--serif); font-size: 34px; font-weight: 500; margin: 0 0 6px; }
.profile-id .sub { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.stats { display: flex; gap: 36px; text-align: right; }
.stat-num { font-family: var(--mono); font-size: 30px; letter-spacing: -0.02em; }
.stat-num.accent { color: var(--accent); }
.stat-cap { font-size: 12px; color: var(--muted-2); margin-top: 2px; }

.grid-profile { display: grid; grid-template-columns: 1fr 320px; gap: 56px; margin-top: 36px; }
.h2-serif { font-family: var(--serif); font-size: 22px; font-weight: 500; margin: 0 0 18px; }
.h2-serif.spaced { margin: 40px 0 4px; }

.progress-list { display: flex; flex-direction: column; gap: 18px; }
.progress-row .caps { display: flex; justify-content: space-between; gap: 12px; font-size: 14px; margin-bottom: 7px; }
.progress-row .caps .n { font-family: var(--mono); color: var(--muted); }
.progress-row.is-locked .caps { color: var(--muted-2); }
.bar { height: 7px; background: var(--line-soft); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--accent); }
.bar-fill.done { background: var(--green); }

.recent-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 15px;
}
.recent-row .date { font-family: var(--mono); font-size: 12px; color: var(--muted-2); width: 80px; flex: none; }
.recent-row .name { flex: 1; min-width: 0; }
.recent-row code { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.recent-row .tries { font-family: var(--mono); font-size: 12px; width: 78px; text-align: right; flex: none; color: var(--muted-2); }
.recent-row .tries.good { color: var(--green); }

.side { display: flex; flex-direction: column; gap: 14px; }
.card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 18px;
}
.card .block-label { display: block; margin-bottom: 12px; }
.kv { display: flex; flex-direction: column; gap: 11px; font-size: 14px; }
.kv > div { display: flex; justify-content: space-between; gap: 12px; }
.kv .v { font-family: var(--mono); color: var(--muted); }
.kv .v.warn { color: var(--accent); }
.card p { margin: 0 0 14px; font-size: 14px; line-height: 1.6; color: var(--ink-2); }
.btn-accent.block { width: 100%; justify-self: stretch; padding: 9px; font-size: 13px; text-align: center; }

/* ---------------------------------------------------------- рейтинг */

.board-head {
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
  margin-bottom: 6px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.seg {
  display: flex;
  gap: 2px;
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 2px;
  background: var(--surface);
}
.seg button {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 12px;
  border: none;
  border-radius: 3px;
  background: none;
  color: var(--muted);
  cursor: pointer;
}
.seg button:hover { background: var(--hover); }
.seg button.is-on { background: var(--ink); color: var(--surface); }

.board-cols { grid-template-columns: 56px 1fr 96px 128px 120px; }
.board-row {
  display: grid;
  gap: 0 20px;
  align-items: center;
  padding: 14px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 15px;
}
.board-row:hover { background: var(--surface); }
.board-row .place { font-family: var(--mono); font-size: 14px; color: var(--muted-2); }
.board-row .who { display: flex; align-items: center; gap: 11px; min-width: 0; }
.ava-sm {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--line-soft);
  color: #5c574c;
  font-family: var(--mono);
  font-size: 11px;
  display: grid;
  place-items: center;
  flex: none;
}
.board-row .lv { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.board-row .solved { font-family: var(--mono); font-size: 14px; }
.board-row .tries { font-family: var(--mono); font-size: 14px; color: var(--muted); }
.board-row.me {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--accent-tint);
  box-shadow: inset 3px 0 0 var(--accent);
}
.board-row.me:hover { background: var(--accent-tint-2); }
.board-row.me .place { color: var(--accent); }
.board-row.me .who span:last-child { font-weight: 500; }
.board-row.me .ava-sm { background: #1f2124; color: #e8e4d9; }

/* ---------------------------------------------------------- адаптив */

@media (max-width: 1180px) {
  .layout-task { grid-template-columns: minmax(0, 1fr); max-width: 900px; }
  .task-pane { border-right: none; border-bottom: 1px solid var(--line); max-width: none; justify-self: stretch; padding-bottom: 40px; }
  .work-pane { max-width: none; }
}

@media (max-width: 1024px) {
  .layout-catalog { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .aside { flex-direction: row; flex-wrap: wrap; gap: 28px 44px; }
  .filter-group { flex: 1 1 240px; }
  .grid-profile { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 900px) {
  .table-cols { grid-template-columns: 52px 1fr auto; }
  .row-topics, .row-rate { display: none; }
  .table-head span:nth-child(3), .table-head span:nth-child(4) { display: none; }
  .row-meta-sm { display: block; }
  .board-cols { grid-template-columns: 40px 1fr 84px 72px; }
  .board-row .tries, .table-head.board-cols span:nth-child(5) { display: none; }
}

@media (max-width: 760px) {
  .site-header { height: auto; padding: 12px 20px; flex-wrap: wrap; gap: 12px; }
  .hdr-left { gap: 18px; flex: 1 1 100%; flex-wrap: wrap; }
  .nav { flex-wrap: wrap; }
  .user-name { display: none; }
  .layout-catalog, .layout-narrow { padding: 28px 20px 60px; }
  .task-pane, .work-pane { padding: 28px 20px 44px; }
  .site-footer { padding: 18px 20px; }
  .aside-toggle { display: block; }
  .aside { flex-direction: column; gap: 26px; }
  .display { font-size: 30px; }
  .display-lg { font-size: 30px; }
  .section-tools { width: 100%; }
  .input-mono { flex: 1; width: auto; }
  .stats { gap: 22px; text-align: left; }
  .stat-num { font-size: 24px; }
  .recent-row { flex-wrap: wrap; gap: 8px 14px; }
  .recent-row code { order: 3; flex-basis: 100%; }
  .term-body { min-height: 260px; font-size: 12.5px; }
}

/* ---------------------------------------------------------- баннеры и тосты */

.banner {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  padding: 14px 16px;
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--ink-2);
}
.banner .btn-accent, .banner .btn-quiet { margin-left: auto; justify-self: auto; }
.banner-warn { border-left-color: #b8862f; background: #fbf6ea; }

.chip-mono.ok { color: var(--green); border-color: var(--green-line); background: var(--green-bg); }
.chip-mono.warn { color: var(--accent); border-color: var(--accent-line); background: var(--accent-tint); }
.badge-meta.ok { color: var(--green); }
.checks-verdict.idle { color: var(--muted-2); }

.toasts {
  position: fixed; right: 20px; bottom: 20px; z-index: 60;
  display: flex; flex-direction: column; gap: 8px;
  max-width: min(360px, calc(100vw - 40px));
}
.toast {
  background: #1f2124; color: #ece7db;
  font-size: 14px; line-height: 1.5;
  padding: 12px 14px;
  border-radius: 8px;
  box-shadow: 0 18px 40px -20px rgba(27, 26, 23, .6);
  border-left: 3px solid var(--muted-2);
  animation: toast-in .18s ease-out;
}
.toast-ok { border-left-color: var(--term-green); }
.toast-warn { border-left-color: #e0a458; }
.toast.is-out { opacity: 0; transform: translateY(6px); transition: opacity .5s, transform .5s; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px) } to { opacity: 1; transform: none } }

/* ---------------------------------------------------------- экран входа */

.auth-wrap {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 460px) minmax(0, 420px);
  gap: 64px;
  align-items: start;
  justify-content: center;
  max-width: 1080px; width: 100%;
  margin: 0 auto;
  padding: 56px 40px 90px;
}

.auth-card {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 12px;
  padding: 32px;
}
.auth-brand {
  font-family: var(--mono); font-size: 15px; font-weight: 700;
  letter-spacing: -0.03em; margin-bottom: 20px;
}
.auth-title {
  font-family: var(--serif); font-size: 30px; font-weight: 500;
  letter-spacing: -0.02em; margin: 0 0 10px;
}
.auth-lede { margin: 0 0 24px; font-size: 14px; line-height: 1.6; color: var(--muted); }

.auth-providers { display: flex; flex-direction: column; gap: 10px; }
.prov {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  width: 100%;
  font: inherit; font-size: 15px; font-weight: 500;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
}
.prov:hover:not(:disabled) { border-color: var(--muted-2); background: #fff; }
.prov:disabled { opacity: .5; cursor: not-allowed; }
.prov svg { flex: none; }

.auth-hint {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--muted-2);
}
.auth-hint .link-btn { font-size: 13px; }

.auth-sep {
  display: flex; align-items: center; gap: 12px;
  margin: 22px 0 18px;
  font-family: var(--mono); font-size: 11px;
  letter-spacing: .08em; text-transform: uppercase; color: var(--muted-2);
}
.auth-sep::before, .auth-sep::after {
  content: ''; flex: 1; height: 1px; background: var(--line);
}

.auth-tabs {
  display: flex; gap: 2px;
  border: 1px solid var(--line); border-radius: 6px; padding: 2px;
  background: var(--paper);
  margin-bottom: 18px;
}
.auth-tabs button {
  flex: 1;
  font: inherit; font-size: 14px;
  padding: 8px; border: none; border-radius: 4px;
  background: none; color: var(--muted); cursor: pointer;
}
.auth-tabs button:hover { color: var(--ink); }
.auth-tabs button.is-on { background: var(--ink); color: var(--surface); }

.auth-form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field > span { font-size: 13px; color: var(--muted); }
.field input {
  font: inherit; font-size: 15px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}
.field input:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }

.auth-error {
  display: none;
  font-size: 13px; line-height: 1.5;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 6px;
  padding: 10px 12px;
}
.auth-error.is-on { display: block; }

.btn-accent.block, .btn-quiet.block {
  display: block; width: 100%;
  text-align: center;
  justify-self: stretch;
}
.btn-accent.block { padding: 11px; font-size: 14px; }
.btn-accent:disabled { opacity: .55; cursor: not-allowed; }

.auth-foot {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
  font-size: 13px;
}

.auth-side { display: flex; flex-direction: column; gap: 22px; padding-top: 18px; }
.auth-term .term-body { min-height: 0; padding: 16px 18px; }
.auth-points {
  margin: 0; padding-left: 20px;
  font-size: 14px; line-height: 1.8; color: var(--muted);
}

/* ---------------------------------------------------------- профиль: аккаунт */

.avatar-lg-wrap { flex: none; }
.avatar-lg { object-fit: cover; }
.profile-chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.account-actions { display: flex; flex-direction: column; gap: 8px; }
.btn-quiet.block { padding: 9px; font-size: 13px; }
.btn-quiet.danger { color: var(--accent); border-color: var(--accent-line); }
.btn-quiet.danger:hover { border-color: var(--accent); }
img.ava-sm { object-fit: cover; }

.board-note {
  padding: 18px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: 14px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .auth-wrap { grid-template-columns: minmax(0, 1fr); gap: 32px; padding: 32px 20px 70px; }
  .auth-side { padding-top: 0; }
}

@media (max-width: 760px) {
  .auth-card { padding: 24px 20px; }
  .toasts { right: 12px; left: 12px; bottom: 12px; max-width: none; }
}