/* ══════════════════════════════════════════════════════════════════
   app.css — Happy Light Daily Learner.

   The suite's warm-ink tokens, so theme.js's [data-theme] switch drives
   this page as it drives Maths, Sandbox and Journal. Dark is the bare
   :root; light overrides only what changes. theme.js stamps data-theme
   before first paint.

   The CSP is style-src 'self' with no 'unsafe-inline': nothing in the
   markup sets a style attribute, and the scripts only touch styles
   through the CSSOM. The bracket is SVG, coloured by classes here.
   ══════════════════════════════════════════════════════════════════ */
:root{
  --bg:#0b0a0d; --bg-2:#16131a;
  --panel:rgba(29,25,34,.86); --panel-solid:#1d1922;
  --line:rgba(184,175,164,.20); --line-hot:rgba(245,158,11,.45);
  --ink:#f5f1ea; --ink-dim:#b8afa4; --ink-faint:#6b635a;
  --brand:#f59e0b; --brand-2:#a78bfa;
  --fight:#f0566b; --fight-soft:rgba(240,86,107,.14);
  --ok:#4ee8a5; --warn:#fbbf24; --bad:#f87171;
  --surf:rgba(43,37,51,.72); --surf-2:rgba(55,48,64,.8);
  --shadow:4px 4px 0 rgba(0,0,0,.45);
  --logo-glow:1; --logo-glow-color:#f59e0b; --logo-bulb:#d9a441;
  --logo-glass-hi:#fffdf6; --logo-glass-lo:#f8e3b6; --logo-face:#8a6a3b;
  --font:"Inter Variable","Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:12px;
  /* bracket */
  --b-box:#1d1922; --b-box-line:rgba(184,175,164,.28); --b-wire:rgba(184,175,164,.35);
  --b-win:#f5f1ea; --b-lose:#8d8479; --b-ready:#f59e0b;
}
:root[data-theme="light"]{
  --bg:#faf8f4; --bg-2:#f1ece2;
  --panel:rgba(255,253,247,.92); --panel-solid:#fffdf7;
  --line:rgba(90,74,54,.22); --line-hot:rgba(180,83,9,.42);
  --ink:#241f18; --ink-dim:#5b5145; --ink-faint:#7d7264;
  --brand:#b45309; --brand-2:#6d28d9;
  --fight:#be123c; --fight-soft:rgba(190,18,60,.08);
  --ok:#047857; --warn:#8c6510; --bad:#b91c1c;
  --surf:rgba(241,236,226,.80); --surf-2:rgba(232,225,212,.9);
  --shadow:4px 4px 0 rgba(90,74,54,.22);
  --logo-glow:0; --logo-bulb:#a86f18;
  --logo-glass-hi:#fffaec; --logo-glass-lo:#f2d79c; --logo-face:#6b4d22;
  --b-box:#fffdf7; --b-box-line:rgba(90,74,54,.3); --b-wire:rgba(90,74,54,.38);
  --b-win:#241f18; --b-lose:#7d7264; --b-ready:#b45309;
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html{color-scheme:dark}
:root[data-theme="light"]{color-scheme:light}
body{margin:0;min-height:100dvh;background:var(--bg);color:var(--ink);
  font-family:var(--font);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(60rem 30rem at 85% -10%,var(--fight-soft),transparent 70%),
    radial-gradient(50rem 26rem at -10% 0%,rgba(245,158,11,.08),transparent 70%);
  background-repeat:no-repeat}
a{color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
h1,h2,h3{line-height:1.15;margin:0}
code{font-family:var(--mono);font-size:.9em}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:1rem;top:1rem;z-index:100;background:var(--panel-solid);padding:.5rem 1rem;border-radius:8px}
.muted{color:var(--ink-dim)}
.faint{color:var(--ink-faint)}
.wrap{max-width:72rem;margin:0 auto;padding:0 1rem}

/* ── top bar ── */
.bt-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;
  max-width:72rem;margin:0 auto;padding:.85rem 1rem}
.bt-home{text-decoration:none;color:inherit}
.wordmark{font-weight:700;letter-spacing:-.03em;line-height:1;
  display:inline-flex;flex-direction:column;align-items:center;gap:.3rem;font-size:1.05rem}
.wordmark .hl-lockup{height:2em;width:auto;display:inline-block;color:var(--ink);flex:none}
.wm-b{color:var(--fight);font-size:max(.62rem,.16em);font-weight:800;
  letter-spacing:.26em;text-indent:.26em;text-transform:uppercase;line-height:1}
.bt-top{display:flex;align-items:center;gap:.5rem}

/* ── buttons and fields ── */
.btn{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:.4rem;
  font:inherit;font-size:.9rem;font-weight:600;line-height:1.2;cursor:pointer;text-decoration:none;
  padding:.55rem 1rem;border-radius:999px;border:1px solid var(--line);background:var(--surf);color:var(--ink)}
.btn:hover{border-color:var(--line-hot)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#1a1206}
:root[data-theme="light"] .btn.primary{color:#fff}
.btn.fight{background:var(--fight);border-color:var(--fight);color:#fff}
.btn.danger{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 45%,transparent)}
.btn.small{font-size:.8rem;padding:.35rem .7rem}
.btn.ghost{background:none}
.icon-btn{appearance:none;border:1px solid transparent;background:none;color:var(--ink-dim);
  width:2rem;height:2rem;border-radius:8px;display:inline-grid;place-items:center;cursor:pointer;font:inherit}
.icon-btn:hover{border-color:var(--line);color:var(--ink)}
.icon-btn svg{width:1rem;height:1rem;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}

input[type=text],input[type=number],select,textarea{font:inherit;color:var(--ink);
  background:var(--bg-2);border:1px solid var(--line);border-radius:8px;padding:.5rem .65rem;width:100%;min-width:0}
textarea{resize:vertical;min-height:6rem;line-height:1.4}
input[type=number]{width:5.5rem}
input:focus,select:focus,textarea:focus{border-color:var(--line-hot);outline:none}
input[type=checkbox],input[type=radio]{accent-color:var(--brand)}
label.field{display:flex;flex-direction:column;gap:.3rem;font-size:.85rem;color:var(--ink-dim)}
label.field > span{font-weight:600;color:var(--ink)}
label.check{display:flex;align-items:center;gap:.5rem;font-size:.9rem;cursor:pointer}
.row{display:flex;gap:.75rem;flex-wrap:wrap;align-items:flex-end}

.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:1.1rem}
.badge{display:inline-flex;align-items:center;gap:.3rem;font-size:.72rem;font-weight:700;letter-spacing:.04em;
  text-transform:uppercase;padding:.15rem .55rem;border-radius:999px;border:1px solid var(--line);color:var(--ink-dim);white-space:nowrap}
.badge.live{color:var(--fight);border-color:color-mix(in srgb,var(--fight) 50%,transparent)}
.badge.live::before{content:"";width:.45rem;height:.45rem;border-radius:50%;background:var(--fight);animation:pulse 1.6s infinite}
.badge.done{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 45%,transparent)}
.badge.draft{color:var(--warn)}
@keyframes pulse{50%{opacity:.25}}
.msg{font-size:.88rem;margin:.5rem 0 0}
.msg.err{color:var(--bad)}
.msg.ok{color:var(--ok)}

/* ── bar menu ── same <details>/<summary> pattern as the siblings ── */
.mx-seg{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--surf)}
.mx-seg button{appearance:none;background:none;border:0;color:var(--ink-dim);
  font:inherit;font-size:.78rem;padding:.3rem .7rem;cursor:pointer;white-space:nowrap}
.mx-seg button.on{background:var(--brand);color:#1a1206;font-weight:700}
:root[data-theme="light"] .mx-seg button.on{color:#fff}
.hl-menu{position:relative}
.hl-menu-summary{display:flex;align-items:center;gap:.45rem;cursor:pointer;list-style:none;
  padding:.4rem .8rem;border:1px solid var(--line);border-radius:999px;background:var(--panel);
  color:var(--ink-dim);font-size:.8rem;user-select:none;box-shadow:var(--shadow)}
.hl-menu-summary::-webkit-details-marker{display:none}
.hl-menu-summary:hover{border-color:var(--line-hot);color:var(--ink)}
.hl-menu-bars{width:.85rem;height:.7rem;flex:none;
  border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}
.hl-menu-bars::after{content:"";position:absolute;left:0;right:0;top:calc(50% - 1px);border-top:2px solid currentColor}
.hl-menu-panel{position:absolute;right:0;top:calc(100% + .35rem);z-index:60;
  min-width:15rem;display:flex;flex-direction:column;padding:.3rem;
  border:1px solid var(--line);border-radius:.6rem;background:var(--panel-solid);box-shadow:var(--shadow)}
.hl-menu-head{margin:.45rem .55rem .2rem;font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint)}
.hl-menu-head:first-child{margin-top:.2rem}
.hl-menu-item{appearance:none;background:none;border:0;cursor:pointer;font:inherit;
  font-size:.85rem;color:var(--ink);text-align:left;text-decoration:none;padding:.45rem .55rem;border-radius:.4rem}
.hl-menu-item:hover{background:var(--line)}
.hl-menu-item:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.hl-menu-seg{margin:.15rem .55rem .3rem;align-self:flex-start}

/* ── signed-in chip ── same markup and rules in every Happy Light app. ── */
.hl-me{display:inline-flex;align-items:center;gap:.4rem;flex:none;max-width:13rem;
  padding:.15rem .7rem .15rem .15rem;border-radius:999px;
  border:1px solid color-mix(in srgb,var(--ok) 40%,var(--line));
  background:color-mix(in srgb,var(--ok) 9%,var(--surf,transparent));
  color:var(--ink);font-size:.78rem;font-weight:600;line-height:1.2;
  text-decoration:none;white-space:nowrap}
.hl-me:hover{border-color:color-mix(in srgb,var(--ok) 65%,transparent);
  background:color-mix(in srgb,var(--ok) 16%,var(--surf,transparent))}
.hl-me-avatar{position:relative;display:grid;place-items:center;flex:none;
  width:1.45rem;height:1.45rem;border-radius:50%;
  background:color-mix(in srgb,var(--ink) 10%,transparent)}
.hl-me-ghost{width:.8rem;height:.8rem;fill:currentColor;animation:hl-me-bob 2.4s steps(4) infinite}
.hl-me-dot{position:absolute;right:-1px;bottom:-1px;width:.5rem;height:.5rem;
  border-radius:50%;background:var(--ok);box-shadow:0 0 0 2px var(--bg)}
.hl-me-dot::after{content:"";position:absolute;inset:0;border-radius:inherit;
  background:var(--ok);animation:hl-me-ping 2.4s cubic-bezier(.22,.61,.36,1) infinite}
.hl-me-name{min-width:0;overflow:hidden;text-overflow:ellipsis}
@keyframes hl-me-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-1px)}}
@keyframes hl-me-ping{0%{transform:scale(1);opacity:.6}70%,100%{transform:scale(2.4);opacity:0}}
@media (max-width:560px){.hl-me{padding:.15rem}.hl-me-name{display:none}}
@media (prefers-reduced-motion:reduce){.hl-me-ghost,.hl-me-dot::after{animation:none}}

@media (max-width:640px){
  .bt-bar{padding:.6rem .75rem}
  .hl-menu-word{display:none}
  .wordmark{font-size:.85rem}
  .wrap{padding:0 .75rem}
  .card{padding:.85rem}
  .match{grid-template-columns:1fr auto 1fr;gap:.4rem;padding:.5rem .55rem;font-size:.9rem}
  .match .st{grid-column:1/-1;text-align:left;min-width:0}
  .match .sc{min-width:3.2rem}
  .tables{grid-template-columns:1fr}
  table.standings th,table.standings td{padding:.4rem .3rem}
  table.standings .opt{display:none}
  .link-row > .faint{flex-basis:100%}
}

/* ══ Daily Learner ══════════════════════════════════════════════════ */
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.small{font-size:.84rem}
.loading{color:var(--ink-faint);text-align:center;padding:3rem 0}
main:focus{outline:none}
main.wrap{padding-bottom:4rem}

/* ── hero ── */
.hero{text-align:center;padding:2rem 1rem 1.4rem}
.hero h1{font-size:clamp(2.2rem,7vw,3.8rem);font-weight:900;letter-spacing:-.04em}
.slogan{display:inline-block;margin:.6rem 0 0;font-size:clamp(1.05rem,2.8vw,1.4rem);font-weight:800;font-style:italic;
  padding:.3rem .9rem;border-radius:.4rem;transform:rotate(-1.2deg);
  background:linear-gradient(90deg,var(--fight-soft),rgba(245,158,11,.14));border:1px solid var(--line-hot)}
.slogan b{color:var(--brand)}
.hero p.sub{max-width:38rem;margin:1rem auto 0;color:var(--ink-dim)}
.signin{max-width:34rem;margin:0 auto 1rem;text-align:center;display:grid;gap:.7rem;justify-items:center}
.signin p{margin:0}
.section-title{font-size:1.1rem;margin:1.6rem 0 .7rem}

/* ── streak chip in the bar ── */
.streak-chip{display:inline-flex;align-items:center;gap:.25rem;text-decoration:none;color:var(--brand);font-weight:800;
  border:1px solid var(--line-hot);border-radius:999px;padding:.25rem .65rem;background:var(--surf)}
.streak-chip .flame::before{content:"🔥"}
.streak-chip.cold{color:var(--ink-faint);border-color:var(--line)}
.streak-chip.cold .flame{filter:grayscale(1);opacity:.6}

/* ── today ── */
.today{display:grid;gap:1rem;max-width:52rem;margin:0 auto}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(7.5rem,1fr));gap:.6rem}
.stat{display:flex;flex-direction:column;align-items:center;gap:.1rem;padding:.6rem;border:1px solid var(--line);border-radius:10px;background:var(--surf)}
.stat b{font-size:1.6rem;font-weight:900;letter-spacing:-.02em;line-height:1.1}
.stat span{font-size:.78rem;color:var(--ink-dim)}
.stat.streak b{color:var(--brand)}
.stat.streak b::before{content:"🔥 ";font-size:1.2rem}
.stat.streak.cold b{color:var(--ink-dim)}
.goal-head{display:flex;justify-content:space-between;gap:1rem;margin-bottom:.35rem}
.goal p{margin:.4rem 0 0}
.bar{height:.6rem;border-radius:999px;background:var(--bg-2);border:1px solid var(--line);overflow:hidden}
.bar-fill{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--fight));border-radius:999px;transition:width .4s}
.strip{display:grid;grid-template-columns:repeat(28,1fr);gap:3px}
.strip .cell{aspect-ratio:1;border-radius:3px;background:var(--bg-2);border:1px solid var(--line)}
.strip .cell.l1{background:color-mix(in srgb,var(--brand) 30%,var(--bg-2))}
.strip .cell.l2{background:color-mix(in srgb,var(--brand) 60%,var(--bg-2))}
.strip .cell.l3{background:var(--brand)}
.strip .cell.today{outline:2px solid var(--ink-dim);outline-offset:1px}

/* ── tracks ── */
.track-list{list-style:none;margin:0;padding:0;display:grid;gap:.8rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,19rem),1fr))}
.track-card{display:flex;flex-direction:column;gap:.5rem;text-decoration:none;color:inherit;height:100%}
a.track-card:hover{border-color:var(--line-hot)}
.track-card p{margin:0}
.track-head{display:flex;align-items:center;justify-content:space-between;gap:.5rem}
.track-head h3{font-size:1.25rem}
.track-card.soon{opacity:.6}

/* ── page heads ── */
.page-head{display:grid;gap:.4rem;padding:1rem 0 .8rem}
.page-head h1{font-size:clamp(1.6rem,4.5vw,2.4rem);font-weight:900;letter-spacing:-.03em}
.page-head p{margin:0}
.crumbs{font-size:.85rem;color:var(--ink-faint)}
.crumbs a{color:var(--ink-dim);text-decoration:none}
.crumbs a:hover{color:var(--brand)}

/* ── units ── */
.units{display:grid;gap:1rem;grid-template-columns:repeat(auto-fill,minmax(min(100%,21rem),1fr));align-items:start}
.unit{display:grid;gap:.4rem}
.unit p{margin:0}
.unit-head{display:flex;align-items:center;gap:.6rem;flex-wrap:wrap}
.unit-head h2{font-size:1.15rem;margin-right:auto}
.badge.lvl1{color:var(--ok)}
.badge.lvl2{color:var(--brand)}
.badge.lvl3{color:var(--fight)}
.badge.lvl4{color:var(--brand-2)}
.badge.done{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 45%,transparent)}
.ex-list{list-style:none;margin:.3rem 0 0;padding:0;display:grid;gap:.25rem;grid-template-columns:repeat(auto-fill,minmax(9.5rem,1fr))}
.ex-link{display:flex;align-items:center;gap:.4rem;padding:.35rem .5rem;border:1px solid var(--line);border-radius:8px;
  text-decoration:none;color:var(--ink);background:var(--surf);font-family:var(--mono);font-size:.84rem;min-width:0}
.ex-link:hover{border-color:var(--brand)}
.ex-list.wide{grid-template-columns:minmax(0,1fr)}
.ex-list.wide .ex-link{font-family:var(--font)}
.ex-link .tick{color:var(--ink-faint);width:1em;text-align:center;flex:none}
.ex-link .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.ex-link .xp{font-size:.72rem;color:var(--ink-faint)}
.ex-link.solved{border-color:color-mix(in srgb,var(--ok) 45%,transparent)}
.ex-link.solved .tick{color:var(--ok);font-weight:900}

/* ── exercise ── */
.ex-title{display:flex;align-items:center;gap:.7rem;flex-wrap:wrap}
.ex-title h1{font-family:var(--mono);font-weight:800}
.ex-grid{display:grid;gap:1.2rem;grid-template-columns:minmax(0,1fr)}
@media (min-width:60rem){.ex-grid{grid-template-columns:minmax(0,2fr) minmax(0,3fr)}}
.ex-prompt{display:grid;gap:.7rem;align-content:start}
.prose p{margin:0 0 .6rem}
.prose code,.hint code{background:var(--bg-2);border:1px solid var(--line);border-radius:4px;padding:0 .25rem}
.examples{list-style:none;margin:0;padding:.6rem .8rem;display:grid;gap:.25rem;border-left:3px solid var(--brand);background:var(--surf);border-radius:0 8px 8px 0}
.examples code{font-size:.88rem}
.ex-prompt p{margin:0}
.hint{border:1px dashed var(--line-hot);border-radius:8px;padding:.6rem .8rem;font-size:.9rem;background:var(--surf)}
.hint p{margin:0 0 .4rem}
.hint p:last-child{margin:0}
pre.code,pre.compile,.results pre{font-family:var(--mono);font-size:.82rem;line-height:1.45;margin:0;padding:.7rem .8rem;
  background:var(--bg-2);border:1px solid var(--line);border-radius:8px;overflow:auto;white-space:pre}
pre.compile{color:var(--bad);white-space:pre-wrap;max-height:22rem}
.ex-work{display:grid;gap:.6rem;align-content:start;min-width:0}
.editor-box{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--bg-2);min-height:14rem}
.editor-box:focus-within{border-color:var(--line-hot)}
.code-fallback{display:block;width:100%;min-height:16rem;border:0;border-radius:0;font-family:var(--mono);font-size:14px;line-height:1.5;
  tab-size:4;white-space:pre;background:var(--bg-2)}
.go-row{align-items:center}
.btn.go{min-width:6rem;font-size:1rem}
.out{display:grid;gap:.6rem}
table.results{width:100%;border-collapse:collapse;font-size:.86rem}
table.results th{text-align:left;font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-dim);padding:.3rem .5rem}
table.results td{padding:.35rem .5rem;border-top:1px solid var(--line);vertical-align:top}
table.results td.call{word-break:break-all}
table.results td.st{font-weight:800;text-align:center;width:4.5rem;white-space:nowrap}
table.results tr.pass td.st{color:#062e1d;background:var(--ok)}
table.results tr.fail td.st{color:#fff;background:var(--bad)}
table.results tr.log td{border-top:0;padding-top:0}
table.results tr.log pre{color:var(--ink-dim);max-height:10rem;white-space:pre-wrap}
.ex-nav{display:flex;justify-content:space-between;margin-top:1.4rem}

/* ── quiz ── */
.quiz{display:grid;gap:.8rem;max-width:44rem}
.choices{display:grid;gap:.5rem}
.choice{appearance:none;text-align:left;font:inherit;cursor:pointer;color:var(--ink);background:var(--surf);
  border:1px solid var(--line);border-radius:10px;padding:.6rem .8rem}
.choice code{font-family:var(--mono);font-size:.9rem;white-space:pre-wrap}
.choice:hover:not(:disabled){border-color:var(--brand)}
.choice:disabled{cursor:default}
.choice.right{border-color:var(--ok);box-shadow:inset 0 0 0 1px var(--ok)}
.choice.wrong{border-color:var(--bad);box-shadow:inset 0 0 0 1px var(--bad)}

/* ── leaderboard + settings ── */
.tabs{display:flex;gap:.3rem;flex-wrap:wrap;border-bottom:1px solid var(--line);margin:0 0 .8rem}
.tab{font-size:.9rem;font-weight:600;color:var(--ink-dim);text-decoration:none;border-bottom:2px solid transparent;padding:.5rem .8rem;margin-bottom:-1px}
.tab[aria-selected=true]{color:var(--ink);border-bottom-color:var(--brand)}
.table-card{overflow-x:auto}
table.standings{width:100%;border-collapse:collapse;font-size:.92rem}
table.standings th,table.standings td{padding:.5rem;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
table.standings th{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-dim)}
table.standings th.name,table.standings td.name{text-align:left;width:100%;white-space:normal}
table.standings td.rank{text-align:center;width:2.5rem}
table.standings td.pts{font-weight:800}
table.standings tr.me td{background:color-mix(in srgb,var(--brand) 12%,transparent)}
.empty{text-align:center;color:var(--ink-dim);padding:2rem 1rem}
.settings{display:grid;gap:.6rem;max-width:34rem;margin-bottom:1rem}
.settings p{margin:0}
.settings select{max-width:16rem}
.rules{margin:.6rem 0 0;padding-left:1.2rem;display:grid;gap:.3rem;color:var(--ink-dim)}

/* ── toasts ── */
.toasts{position:fixed;right:1rem;bottom:1rem;display:grid;gap:.4rem;z-index:50;max-width:calc(100vw - 2rem)}
.toast{background:var(--panel-solid);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:.55rem .9rem;
  font-weight:700;font-size:.9rem;animation:pop .25s ease-out}
.toast.ok{border-color:var(--ok)}
.toast.hot{border-color:var(--brand);color:var(--brand)}
.toast.cool{border-color:#7dd3fc}
.toast.err{border-color:var(--bad);color:var(--bad)}
.toast.out{opacity:0;transform:translateY(.4rem);transition:.5s}
@keyframes pop{from{opacity:0;transform:translateY(.6rem)}}
@media (prefers-reduced-motion:reduce){.toast,.bar-fill{animation:none;transition:none}}
.credit{margin-top:2rem;padding-top:1rem;border-top:1px solid var(--line)}
.credit a{color:var(--ink-dim)}

/* ── memory view (js/memviz.js) ── */
.mem-note{color:var(--ink-dim);border-left:3px solid var(--brand-2);padding:.2rem 0 .2rem .6rem;margin:0}
table.results tr.note td{color:var(--bad);font-size:.84rem;border-top:0;padding-top:0}
table.results td.call .mv-open{margin-left:.5rem;padding:.15rem .55rem;font-size:.72rem;vertical-align:middle}
.mv-open.on{border-color:var(--brand-2);color:var(--brand-2)}
.mv{display:grid;gap:.5rem;border:1px solid var(--line);border-radius:10px;background:var(--panel);padding:.7rem .8rem;margin-top:.4rem}
.mv:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.mv-head{display:flex;justify-content:space-between;align-items:baseline;gap:.6rem;flex-wrap:wrap}
.mv-head b{font-family:var(--mono);font-size:.86rem;word-break:break-all}
.mv-caption{margin:0;font-weight:700;min-height:2.6em;font-size:.92rem}
.mv-caption.good{color:var(--ok)}
.mv-caption.bad{color:var(--bad)}
.mv-stage{width:100%;min-width:0}
.mv-svg{display:block;width:100%;height:auto;font-family:var(--mono)}
.mv-svg .mv-h{fill:var(--ink-dim);font:700 12px var(--font);letter-spacing:.06em;text-transform:uppercase}
.mv-svg .mv-h.small{font-size:10.5px}
.mv-svg .mv-empty{fill:var(--ink-faint);font-size:12px;font-style:italic}
.mv-frame rect{fill:var(--surf);stroke:var(--line)}
.mv-frame text{fill:var(--ink-dim);font-size:12px}
.mv-frame.top rect{stroke:var(--brand);stroke-width:2}
.mv-frame.top text{fill:var(--ink);font-weight:700}
.mv-frame.base rect{stroke-dasharray:4 3}
.mv-block rect{stroke-width:1.5;transition:fill .3s,stroke .3s}
.mv-block text{font-size:11px}
.mv-block .mv-id{font-weight:700}
.mv-block.live rect{fill:color-mix(in srgb,var(--ok) 26%,var(--bg-2));stroke:var(--ok)}
.mv-block.live text{fill:var(--ink)}
.mv-block.freed rect{fill:var(--bg-2);stroke:var(--line)}
.mv-block.freed text{fill:var(--ink-faint)}
.mv-block.leak rect,.mv-block.bad rect{fill:color-mix(in srgb,var(--bad) 22%,var(--bg-2));stroke:var(--bad);stroke-width:2.5}
.mv-block.leak text,.mv-block.bad text{fill:var(--bad)}
.mv-block.leak rect{animation:mv-pulse 1.1s ease-in-out infinite}
.mv-block.tag-arena rect,.mv-block.tag-scratch rect{stroke-dasharray:5 3}
.mv-block.by-unwind rect{stroke:var(--warn);stroke-dasharray:2 2}
.mv-chip rect{fill:color-mix(in srgb,var(--warn) 18%,var(--bg-2));stroke:var(--warn)}
.mv-chip text{fill:var(--ink);font-size:11px}
.mv-fill .track{fill:var(--bg-2);stroke:var(--line)}
.mv-fill .used{fill:var(--brand-2);transition:width .3s}
.mv-fill.oom .track{stroke:var(--bad);stroke-width:2;animation:mv-flash .5s ease-out 2}
.mv-arrow{fill:none;stroke:var(--bad);stroke-width:2.5;stroke-dasharray:6 4;animation:mv-march 1s linear infinite}
.mv-arrowhead{fill:var(--bad)}
.mv-controls{display:flex;gap:.3rem;align-items:center;flex-wrap:wrap}
.mv-btn{min-width:2.4rem;font-family:var(--mono)}
.mv-range{flex:1 1 8rem;min-width:6rem;accent-color:var(--brand)}
.mv-legend{display:flex;align-items:center;gap:.3rem;flex-wrap:wrap;margin:0}
.mv-key{display:inline-block;width:.8rem;height:.8rem;border-radius:3px;border:1.5px solid;margin-left:.4rem}
.mv-key.live{background:color-mix(in srgb,var(--ok) 26%,var(--bg-2));border-color:var(--ok)}
.mv-key.freed{background:var(--bg-2);border-color:var(--line)}
.mv-key.leak{background:color-mix(in srgb,var(--bad) 22%,var(--bg-2));border-color:var(--bad)}
.mv-key.arena{border-style:dashed;border-color:var(--ink-dim)}
@keyframes mv-pulse{50%{opacity:.45}}
@keyframes mv-flash{50%{fill:color-mix(in srgb,var(--bad) 40%,var(--bg-2))}}
@keyframes mv-march{to{stroke-dashoffset:-20}}
@media (prefers-reduced-motion:reduce){
  .mv-block rect,.mv-fill .used{transition:none}
  .mv-block.leak rect,.mv-fill.oom .track,.mv-arrow{animation:none}
}