/* =========================================================
   Get Wiser Everyday: math notebook theme, light + dark
   Graph-paper ground, blue ballpoint for lines and buttons,
   highlighter yellow only for shaded regions and wins.
   ========================================================= */

:root {
  --paper: #f5f7fb;
  --sheet: #ffffff;
  --grid: rgba(43, 76, 140, 0.07);
  --ink: #16213b;
  --ink-soft: #55607a;
  --rule: #dfe4ee;
  --pen: #2f5bd3;
  --pen-soft: rgba(47, 91, 211, 0.1);
  --hl: #ffc93c;
  --hl-ink: #5a3e00;
  --good: #1f8a5b;
  --bad: #c43d3d;
  --shadow: 0 1px 2px rgba(22, 33, 59, .05), 0 10px 30px rgba(22, 33, 59, .08);
  --f-display: "Bricolage Grotesque", "Avenir Next", system-ui, sans-serif;
  --f-body: "Atkinson Hyperlegible", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
  --r: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0d1220; --sheet: #141b2e; --grid: rgba(140, 170, 255, 0.06);
    --ink: #e6ebf7; --ink-soft: #9aa5c0; --rule: #26304a;
    --pen: #7f9dff; --pen-soft: rgba(127, 157, 255, 0.14);
    --hl: #ffcf4d; --hl-ink: #2b1f00; --good: #4cc78d; --bad: #ff7a7a;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 14px 34px rgba(0,0,0,.4);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--paper);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }
a { color: var(--pen); }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 2px; border-radius: 6px; }
.wrap {
  max-width: 1040px; margin: 0 auto; width: 100%;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.narrow { max-width: 460px; }
.muted { color: var(--ink-soft); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
[hidden] { display: none !important; }
code { font-family: var(--f-mono); font-size: .92em; background: var(--pen-soft); padding: 1px 6px; border-radius: 5px; white-space: nowrap; }

/* ---------- Header ---------- */
header.top {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--sheet) 88%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule);
}
.top .wrap { display: flex; align-items: center; gap: 12px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); margin-right: auto; }
.brand svg { width: 34px; height: 34px; flex: none; }
.brand .arm { transform-origin: 17px 8px; animation: swing 4s ease-in-out infinite; }
@keyframes swing { 0%,100% { transform: rotate(-8deg); } 50% { transform: rotate(8deg); } }
.brand span { font-family: var(--f-display); font-weight: 800; font-size: 19px; letter-spacing: -0.02em; }
.brand em { font-style: normal; color: var(--pen); }
nav.links { display: flex; gap: 4px; }
nav.links a { color: var(--ink-soft); text-decoration: none; padding: 6px 10px; border-radius: 8px; font-size: 15px; transition: background .2s, color .2s; }
nav.links a:hover, nav.links a[aria-current="page"] { color: var(--ink); background: var(--pen-soft); }
@media (max-width: 640px) { nav.links { display: none; } .brand span { font-size: 17px; } }
.auth .btn { white-space: nowrap; }
@media (max-width: 420px) { .top .wrap { gap: 8px; } .auth .btn { padding: 8px 10px; font-size: 14px; } .brand span { font-size: 15px; } .brand svg { width: 28px; height: 28px; } }
.streak {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--f-mono); font-weight: 600; font-size: 14px;
  padding: 5px 10px; border-radius: 999px; background: color-mix(in srgb, var(--hl) 22%, transparent);
}
.streak svg { width: 16px; height: 16px; }
.streak.bump { animation: bump .6s cubic-bezier(.3,1.8,.5,1); }
@keyframes bump { 40% { transform: scale(1.35); } }
.auth { display: flex; gap: 8px; align-items: center; position: relative; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 0; border-radius: 10px; padding: 9px 16px;
  font-weight: 700; font-size: 15px; text-decoration: none;
  background: var(--pen); color: var(--sheet);
  transition: transform .15s, box-shadow .2s, background .2s, opacity .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px color-mix(in srgb, var(--pen) 35%, transparent); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: default; transform: none; box-shadow: none; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--rule); }
.btn.ghost:hover:not(:disabled) { box-shadow: none; background: var(--pen-soft); }
.btn.big { padding: 13px 22px; font-size: 16px; }
.btn.link { background: none; color: var(--ink-soft); padding: 6px 4px; font-weight: 400; text-decoration: underline; text-underline-offset: 3px; }
.btn.link:hover { box-shadow: none; color: var(--ink); }
.avatar {
  width: 36px; height: 36px; border-radius: 50%; display: grid; place-items: center; border: 0;
  font-weight: 700; background: var(--hl); color: var(--hl-ink); animation: pop .5s cubic-bezier(.3,1.8,.5,1);
}
@keyframes pop { from { transform: scale(0); } }
.menu {
  position: absolute; right: 0; top: calc(100% + 8px); min-width: 210px; z-index: 30;
  background: var(--sheet); border: 1px solid var(--rule); border-radius: 12px; box-shadow: var(--shadow);
  padding: 8px; display: grid; gap: 2px; animation: drop .2s ease;
}
@keyframes drop { from { opacity: 0; transform: translateY(-6px); } }
.menu .who { padding: 6px 10px 10px; border-bottom: 1px solid var(--rule); margin-bottom: 4px; font-size: 14px; }
.menu .who b { display: block; font-size: 15px; }
.menu a, .menu button { text-align: left; background: none; border: 0; padding: 8px 10px; border-radius: 8px; color: var(--ink); text-decoration: none; font-size: 15px; }
.menu a:hover, .menu button:hover { background: var(--pen-soft); }

/* ---------- Intro ---------- */
.intro { padding-block: 34px 18px; display: flex; flex-wrap: wrap; align-items: end; gap: 14px 24px; }
.intro h1 {
  font-family: var(--f-display); font-weight: 800; letter-spacing: -0.035em;
  font-size: clamp(30px, 6vw, 54px); line-height: 1.04; margin: 0; text-wrap: balance;
  flex: 1 1 420px;
}
.intro p { margin: 0; color: var(--ink-soft); max-width: 40ch; flex: 1 1 260px; }
.mark { background: linear-gradient(transparent 58%, var(--hl) 58% 92%, transparent 92%); background-size: 0% 100%; background-repeat: no-repeat; animation: highlight 1s .5s ease forwards; }
@keyframes highlight { to { background-size: 100% 100%; } }
.cta { display: flex; flex-wrap: wrap; gap: 10px; flex: 1 1 320px; }
.cta p { flex-basis: 100%; }

/* ---------- Level switch ---------- */
.levels { display: inline-grid; grid-auto-flow: column; grid-auto-columns: 1fr; background: var(--sheet); border: 1px solid var(--rule); border-radius: 12px; padding: 4px; position: relative; }
.levels button { border: 0; background: none; padding: 8px 14px; border-radius: 9px; font-weight: 700; font-size: 14px; color: var(--ink-soft); position: relative; z-index: 1; transition: color .2s; white-space: nowrap; }
.levels button[aria-pressed="true"] { color: var(--sheet); }
.levels .slider { position: absolute; top: 4px; bottom: 4px; left: 4px; border-radius: 9px; background: var(--pen); transition: transform .35s cubic-bezier(.3,1.3,.5,1), width .35s; }
.levels button small { display: block; font-weight: 400; font-size: 11px; opacity: .8; }
@media (max-width: 420px) { .levels button { padding: 8px 9px; font-size: 13px; } }
.bar-row { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }

/* ---------- Puzzle card ---------- */
.puzzle {
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  background: var(--sheet); border: 1px solid var(--rule); border-radius: 22px; box-shadow: var(--shadow);
  overflow: hidden;
  animation: rise .6s cubic-bezier(.2,.8,.2,1) both;
}
.puzzle.nodiagram { grid-template-columns: minmax(0, .8fr) minmax(0, 1fr); }
@keyframes rise { from { transform: translateY(18px); opacity: .4; } }
@media (max-width: 820px) { .puzzle, .puzzle.nodiagram { grid-template-columns: minmax(0, 1fr); } }
.figure { padding: 22px; border-right: 1px dashed var(--rule); position: relative; min-width: 0; display: flex; flex-direction: column; }
@media (max-width: 820px) { .figure { border-right: 0; border-bottom: 1px dashed var(--rule); } }
.meta { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: 13px; color: var(--ink-soft); }
.chip { font-family: var(--f-mono); font-size: 12px; padding: 3px 8px; border-radius: 6px; background: var(--pen-soft); color: var(--pen); letter-spacing: .02em; }
.chip.hlc { background: color-mix(in srgb, var(--hl) 28%, transparent); color: var(--ink); }
.chip.good { background: color-mix(in srgb, var(--good) 15%, transparent); color: var(--good); }
.timer { margin-left: auto; font-family: var(--f-mono); font-variant-numeric: tabular-nums; }
.bigq { margin: auto 0; padding-block: 24px; font-family: var(--f-display); font-weight: 700; font-size: clamp(26px, 4vw, 40px); letter-spacing: -0.02em; line-height: 1.15; text-wrap: balance; }
.bigq code { font-size: .9em; background: color-mix(in srgb, var(--hl) 35%, transparent); white-space: normal; }

.ask { padding: 26px 26px 24px; display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.ask h2 { font-family: var(--f-display); font-weight: 700; font-size: 26px; line-height: 1.15; letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
.ask p.q { margin: 0; color: var(--ink); font-size: 17px; }
.choices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.choice {
  position: relative; text-align: left;
  padding: 14px 12px 14px 46px; border-radius: 12px;
  border: 1.5px solid var(--rule); background: var(--sheet);
  font-family: var(--f-mono); font-size: 17px; font-weight: 600; font-variant-numeric: tabular-nums;
  transition: border-color .2s, transform .15s, background .2s;
  animation: rise .5s cubic-bezier(.2,.8,.2,1) both;
  overflow-wrap: anywhere;
}
.choice:nth-child(2) { animation-delay: .08s; } .choice:nth-child(3) { animation-delay: .16s; } .choice:nth-child(4) { animation-delay: .24s; }
.choice::before {
  content: attr(data-k); position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  width: 24px; height: 24px; border-radius: 7px; display: grid; place-items: center;
  font-size: 12px; background: var(--pen-soft); color: var(--pen);
}
.choice small { font-size: 12px; color: var(--ink-soft); font-weight: 400; }
.choice:hover:not(:disabled) { border-color: var(--pen); transform: translateY(-2px); }
.choice[aria-pressed="true"] { border-color: var(--pen); background: var(--pen-soft); }
.choice.right { border-color: var(--good); background: color-mix(in srgb, var(--good) 12%, var(--sheet)); }
.choice.right::before { content: "✓"; background: var(--good); color: var(--sheet); }
.choice.wrong { border-color: var(--bad); animation: shake .45s; }
.choice.wrong::before { content: "✕"; background: var(--bad); color: var(--sheet); }
.choice:disabled { cursor: default; }
@keyframes shake { 20%,60% { transform: translateX(-6px); } 40%,80% { transform: translateX(6px); } }
.typed { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.typed label { font-size: 14px; color: var(--ink-soft); width: 100%; }
.typed .box { display: flex; align-items: center; flex: 1 1 180px; border: 1.5px solid var(--rule); border-radius: 10px; background: var(--paper); transition: border-color .2s; }
.typed .box:focus-within { border-color: var(--pen); }
.typed input { flex: 1; min-width: 0; font: inherit; font-family: var(--f-mono); font-size: 17px; padding: 10px 12px; border: 0; background: none; color: var(--ink); outline: none; }
.typed .unit { padding-right: 12px; color: var(--ink-soft); font-size: 14px; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.feedback { min-height: 24px; font-weight: 700; margin: 0; }
.feedback.good { color: var(--good); }
.feedback.bad { color: var(--bad); }
.feedback span { font-weight: 400; color: var(--ink-soft); display: block; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; counter-reset: s; }
.steps li {
  counter-increment: s; display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 10px; align-items: start;
  padding: 10px 12px; border-radius: 10px; background: var(--pen-soft);
  animation: slide .45s cubic-bezier(.2,.8,.2,1) both;
}
.steps li::before { content: counter(s); font-family: var(--f-mono); font-weight: 600; font-size: 13px; width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; background: var(--pen); color: var(--sheet); }
.steps li.final { background: color-mix(in srgb, var(--hl) 25%, transparent); }
.steps li.final::before { content: "="; background: var(--hl); color: var(--hl-ink); }
.steps code { background: var(--sheet); }
@keyframes slide { from { opacity: 0; transform: translateX(-12px); } }
.note { font-size: 13px; color: var(--ink-soft); margin: 0; }

/* ---------- Diagrams (js/diagram.js) ---------- */
svg.dg { display: block; width: 100%; max-width: 420px; height: auto; margin: 12px auto 0; overflow: visible; }
.dg .outline { fill: none; stroke: var(--ink); stroke-width: 2.5; stroke-linejoin: round; }
.dg .pen { fill: none; stroke: var(--pen); stroke-width: 2.5; stroke-linejoin: round; }
.dg .shade { fill: var(--hl); fill-opacity: .6; stroke: none; }
.dg .soft { fill: var(--pen); fill-opacity: .1; stroke: none; }
.dg .bg { fill: var(--sheet); stroke: none; }
.dg .grid { stroke: var(--rule); stroke-width: 1; fill: none; }
.dg .axis { stroke: var(--ink-soft); stroke-width: 1.6; fill: none; }
.dg .bar { fill: var(--pen); fill-opacity: .85; }
.dg .dot { fill: var(--pen); }
.dg .dash { fill: none; stroke: var(--pen); stroke-width: 2; stroke-dasharray: 6 5; }
.dg .mark { fill: none; stroke: var(--ink); stroke-width: 1.5; }
.dg text { font-family: var(--f-mono); font-size: 14px; fill: var(--ink-soft); }
.dg text.pt { font-family: var(--f-display); font-weight: 700; font-size: 16px; fill: var(--ink); }
.dg .draw { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw .9s ease forwards; }
.dg .fade { opacity: 0; animation: fade .5s ease forwards; }
.dg .grow { transform-box: fill-box; transform-origin: bottom; transform: scaleY(0); animation: grow .7s cubic-bezier(.2,.8,.2,1) forwards; }
.dg .step { opacity: 0; transition: opacity .5s; }
.dg .step.on { opacity: 1; }
.dg .shade.pulse { opacity: 1; animation: pulse 1.2s ease 2; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fade { to { opacity: 1; } }
@keyframes grow { to { transform: scaleY(1); } }
@keyframes pulse { 50% { filter: drop-shadow(0 0 6px var(--hl)); } }

/* ---------- Sections below the puzzle ---------- */
section.band { padding-block: 40px 0; }
.band h3 { font-family: var(--f-display); font-weight: 700; font-size: 22px; letter-spacing: -0.02em; margin: 0 0 14px; }
.two { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; }
@media (max-width: 820px) { .two { grid-template-columns: minmax(0, 1fr); } }
.week { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; }
.day { background: var(--sheet); border: 1px solid var(--rule); border-radius: 12px; padding: 10px 4px; text-align: center; font-size: 12px; color: var(--ink-soft); transition: transform .2s; }
.day:hover { transform: translateY(-3px); }
.day b { display: block; font-family: var(--f-mono); font-size: 17px; color: var(--ink); }
.day .dot { width: 10px; height: 10px; border-radius: 50%; margin: 6px auto 0; background: var(--rule); transition: background .4s; }
.day.done .dot { background: var(--good); }
.day.today { border-color: var(--pen); box-shadow: 0 0 0 3px var(--pen-soft); }
.day.today:not(.done) .dot { background: var(--pen); animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .3; } }
.stats { display: flex; gap: 22px; margin-top: 14px; color: var(--ink-soft); font-size: 14px; }
.stats b { font-family: var(--f-mono); font-size: 22px; color: var(--ink); display: block; }

.board { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 6px 16px; }
.board ol { list-style: none; margin: 0; padding: 0; }
.board li { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; gap: 10px; align-items: center; padding: 10px 0; border-bottom: 1px solid var(--rule); font-variant-numeric: tabular-nums; animation: slide .4s both; }
.board li:last-child { border-bottom: 0; }
.board li span:nth-child(2) { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.board .rk { font-family: var(--f-mono); font-weight: 600; color: var(--ink-soft); text-align: center; }
.board li.first .rk { color: var(--hl-ink); background: var(--hl); border-radius: 6px; }
.board .tm { font-family: var(--f-mono); font-size: 14px; color: var(--ink-soft); }
.board li.me { background: var(--pen-soft); margin: 0 -16px; padding-inline: 16px; }
.board .empty { padding: 18px 0; color: var(--ink-soft); }

.features { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 720px) { .features { grid-template-columns: minmax(0, 1fr); } }
.feature { background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 18px; display: grid; gap: 6px; }
.feature svg { width: 44px; height: 44px; }
.feature h4 { margin: 0; font-family: var(--f-display); font-size: 18px; }
.feature p { margin: 0; color: var(--ink-soft); font-size: 15px; }
.feature .spin { transform-origin: 22px 22px; animation: spin 8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Archive ---------- */
.archive { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; }
.card {
  background: var(--sheet); border: 1px solid var(--rule); border-radius: var(--r); padding: 14px;
  text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 6px;
  transition: transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s;
  animation: rise .45s cubic-bezier(.2,.8,.2,1) both;
}
.card:hover { transform: translateY(-4px) rotate(-.6deg); box-shadow: var(--shadow); }
.card .n { font-family: var(--f-mono); font-size: 12px; color: var(--ink-soft); }
.card .t { font-weight: 700; font-size: 16px; line-height: 1.25; }
.card .st { margin-top: auto; }
.pager { display: flex; gap: 10px; align-items: center; justify-content: center; margin-top: 22px; }

/* ---------- Forms (login, reset) ---------- */
.panel { background: var(--sheet); border: 1px solid var(--rule); border-radius: 20px; box-shadow: var(--shadow); padding: 26px; display: grid; gap: 14px; margin-block: 40px; animation: rise .5s cubic-bezier(.2,.8,.2,1) both; }
.panel h1 { font-family: var(--f-display); font-size: 28px; margin: 0; letter-spacing: -0.02em; }
.tabs { display: grid; grid-template-columns: 1fr 1fr; background: var(--paper); border-radius: 10px; padding: 4px; position: relative; }
.tabs button { border: 0; background: none; padding: 8px; border-radius: 8px; font-weight: 700; color: var(--ink-soft); position: relative; z-index: 1; transition: color .2s; }
.tabs button[aria-selected="true"] { color: var(--ink); }
.tabs .slider { position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 4px); background: var(--sheet); border-radius: 8px; box-shadow: var(--shadow); transition: transform .3s cubic-bezier(.3,1.4,.5,1); }
.tabs.second .slider { transform: translateX(100%); }
form.stack { display: grid; gap: 14px; }
.field { display: grid; gap: 4px; font-size: 14px; font-weight: 700; }
.field input, .field select { font: inherit; font-weight: 400; padding: 11px 12px; border-radius: 10px; border: 1.5px solid var(--rule); background: var(--paper); color: var(--ink); transition: border-color .2s; width: 100%; }
.field input:focus, .field select:focus { outline: none; border-color: var(--pen); }
.field small { font-weight: 400; color: var(--ink-soft); }
.pw { position: relative; }
.pw button { position: absolute; right: 6px; top: 50%; transform: translateY(-50%); border: 0; background: none; color: var(--ink-soft); font-size: 13px; padding: 6px; }
.msg { margin: 0; padding: 10px 12px; border-radius: 10px; font-size: 14px; background: var(--pen-soft); }
.msg.bad { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
.msg.good { background: color-mix(in srgb, var(--good) 13%, transparent); color: var(--good); }
.sent { text-align: center; display: grid; gap: 12px; justify-items: center; }
.sent svg { width: 90px; height: 70px; }
.sent .flap { transform-origin: 45px 14px; animation: flap 1s .2s ease both; }
@keyframes flap { from { transform: scaleY(-1); } }
.sent .letter { animation: letter 1.2s .9s cubic-bezier(.2,.8,.2,1) both; }
@keyframes letter { from { transform: translateY(18px); opacity: 0; } }

/* ---------- Parent / age notices ---------- */
.notice {
  margin: 0; padding: 10px 14px; border-radius: 10px; font-size: 15px; color: var(--ink);
  background: color-mix(in srgb, var(--hl) 30%, var(--sheet));
  border: 1px solid color-mix(in srgb, var(--hl) 70%, transparent);
  animation: rise .5s .3s cubic-bezier(.2,.8,.2,1) both;
}
.cta .notice { flex-basis: 100%; }
fieldset.who-for { border: 0; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
fieldset.who-for legend { font-size: 14px; font-weight: 700; margin-bottom: 6px; padding: 0; }
.pick { position: relative; display: block; cursor: pointer; }
.pick input { position: absolute; opacity: 0; }
.pick span { display: grid; gap: 2px; padding: 10px 12px; border: 1.5px solid var(--rule); border-radius: 10px; font-size: 13px; color: var(--ink-soft); background: var(--paper); transition: border-color .2s, background .2s, transform .15s; }
.pick span b { font-size: 15px; color: var(--ink); }
.pick:hover span { transform: translateY(-1px); }
.pick input:checked + span { border-color: var(--pen); background: var(--pen-soft); }
.pick input:focus-visible + span { outline: 3px solid var(--pen); outline-offset: 2px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; cursor: pointer; }
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--pen); flex: none; }

/* ---------- Prose (privacy, 404) ---------- */
.prose { max-width: 680px; padding-block: 36px; }
.prose h1 { font-family: var(--f-display); font-size: 36px; letter-spacing: -0.03em; margin: 0 0 12px; }
.prose h2 { font-family: var(--f-display); font-size: 21px; margin: 28px 0 6px; }

/* ---------- Toast + footer ---------- */
.toast {
  position: fixed; left: 50%; bottom: max(20px, env(safe-area-inset-bottom, 0px)); z-index: 60;
  transform: translateX(-50%); background: var(--ink); color: var(--paper);
  padding: 12px 18px; border-radius: 12px; box-shadow: var(--shadow); font-weight: 700; max-width: calc(100% - 32px);
  animation: toast 4s ease forwards;
}
@keyframes toast { 0% { opacity: 0; transform: translate(-50%, 20px); } 8%, 85% { opacity: 1; transform: translate(-50%, 0); } 100% { opacity: 0; transform: translate(-50%, 10px); } }
footer { padding-block: 48px 30px; color: var(--ink-soft); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; border-top: 1px solid var(--rule); padding-top: 18px; }
footer a { color: var(--ink-soft); }
canvas#confetti { position: fixed; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 50; }
.loading { padding: 60px 0; text-align: center; color: var(--ink-soft); }
.loading::after { content: ""; display: block; width: 28px; height: 28px; margin: 14px auto 0; border-radius: 50%; border: 3px solid var(--rule); border-top-color: var(--pen); animation: spin .8s linear infinite; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}