/* 한국어로 버는 달러 — design system
   Concept: case files on a dark desk. Original implementation (not derived from any third-party stylesheet). */

:root {
  --desk: #1c1714;
  --desk-raised: #262019;
  --desk-line: #3a3129;
  --paper: #eadfc6;
  --paper-shade: #ddd0b2;
  --paper-line: #c4b493;
  --ink: #221e18;
  --ink-soft: #5b5245;
  --ink-faint: #8a7f6c;
  --signal: #b0392b;
  --signal-deep: #8c2c21;
  --on-desk: #e9dfca;
  --on-desk-soft: #b3a68e;

  --font-display: "Barlow Condensed", "Black Han Sans", "Apple SD Gothic Neo", sans-serif;
  --font-body: "Courier Prime", "Nanum Myeongjo", "AppleMyungjo", serif;
  --font-label: "Courier Prime", "Nanum Gothic Coding", ui-monospace, monospace;

  --gutter: clamp(16px, 4vw, 40px);
  --page: 1120px;
  --shadow-paper: 0 1px 0 #fff5 inset, 10px 14px 0 #0006, 0 30px 60px -20px #000a;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background-color: var(--desk);
  background-image:
    radial-gradient(1200px 600px at 15% -10%, #3a2c22 0%, transparent 60%),
    radial-gradient(900px 500px at 110% 30%, #2c221b 0%, transparent 55%),
    repeating-linear-gradient(90deg, #ffffff03 0 2px, transparent 2px 7px);
  color: var(--on-desk);
  font: 400 17px/1.8 var(--font-body);
  word-break: keep-all;
  overflow-wrap: anywhere;
  overflow-x: hidden;
}

a { color: inherit; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 2px dashed var(--signal); outline-offset: 3px; }

.wrap { width: min(var(--page), 100% - var(--gutter) * 2); margin-inline: auto; }

/* ---------- Typography ---------- */
.label {
  font: 700 12px/1.4 var(--font-label);
  letter-spacing: .18em;
  text-transform: uppercase;
}
.display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.01em;
  margin: 0;
}
h1.display { font-size: clamp(40px, 8.4vw, 88px); }
h2.display { font-size: clamp(32px, 5.6vw, 56px); }
h3.display { font-size: clamp(22px, 3vw, 28px); line-height: 1.2; }
.lead { font-size: clamp(17px, 2.1vw, 20px); line-height: 1.75; }
.mark { background: linear-gradient(transparent 58%, #b0392b55 58%); padding: 0 .1em; }

/* ---------- Top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: #1c1714ee;
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--desk-line);
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.brand-name { font: 700 20px/1 var(--font-display); letter-spacing: .02em; }
.brand-file { font: 700 11px/1 var(--font-label); color: var(--signal); letter-spacing: .16em; }
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { text-decoration: none; font: 700 13px/1 var(--font-label); letter-spacing: .08em; color: var(--on-desk-soft); }
.nav a:hover { color: var(--on-desk); }
.nav .btn { color: #fff; }
@media (max-width: 760px) { .nav a:not(.btn) { display: none; } }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 48px; padding: 12px 22px;
  background: var(--signal); color: #fff;
  border: 0; border-radius: 0;
  font: 700 15px/1.3 var(--font-label); letter-spacing: .04em;
  text-decoration: none; cursor: pointer;
  box-shadow: 4px 4px 0 #000a;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.btn:hover { background: var(--signal-deep); transform: translate(-1px, -1px); box-shadow: 5px 5px 0 #000a; }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 #000a; }
.btn:disabled { opacity: .55; cursor: wait; transform: none; }
.btn-small { min-height: 38px; padding: 8px 14px; font-size: 13px; box-shadow: 3px 3px 0 #000a; }
.btn-ghost { background: transparent; color: inherit; border: 1.5px solid currentColor; box-shadow: none; }
.btn-ghost:hover { background: #0000000d; box-shadow: none; }
.btn-block { width: 100%; }

/* ---------- Paper sheet ---------- */
.sheet {
  position: relative;
  background: var(--paper);
  background-image:
    linear-gradient(#0000 0 0),
    repeating-linear-gradient(0deg, #00000000 0 31px, #8a7a5a14 31px 32px);
  color: var(--ink);
  padding: clamp(28px, 5vw, 64px);
  box-shadow: var(--shadow-paper);
}
.sheet::before {
  /* clip & punch holes: the file signature */
  content: ""; position: absolute; left: 22px; top: -12px; width: 64px; height: 26px;
  border: 3px solid #8d8678; border-bottom: 0; opacity: .7;
}
.sheet-tilt-l { transform: rotate(-.6deg); }
.sheet-tilt-r { transform: rotate(.5deg); }
@media (max-width: 640px) { .sheet-tilt-l, .sheet-tilt-r { transform: none; } }

.file-head {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
  padding-bottom: 14px; margin-bottom: 28px;
  border-bottom: 2px solid var(--ink);
  color: var(--ink-soft);
}

.stamp {
  display: inline-block;
  padding: 6px 14px;
  border: 3px solid var(--signal);
  color: var(--signal);
  font: 700 15px/1.2 var(--font-label);
  letter-spacing: .14em;
  transform: rotate(-7deg);
  opacity: .9;
  mix-blend-mode: multiply;
}
.stamp-corner { position: absolute; right: clamp(16px, 4vw, 48px); top: clamp(18px, 4vw, 44px); }

.redact { background: var(--ink); color: transparent; padding: 0 .2em; user-select: none; }

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 10vw, 120px) 0; }
.section-head { max-width: 760px; margin-bottom: clamp(32px, 5vw, 56px); }
.section-head .label { color: var(--signal); display: block; margin-bottom: 14px; }
.section-head p { color: var(--on-desk-soft); margin: 18px 0 0; }
.on-paper .section-head p { color: var(--ink-soft); }

/* Hero */
.hero { padding: clamp(36px, 6vw, 72px) 0 clamp(56px, 8vw, 96px); }
.hero .sheet { padding-top: clamp(40px, 6vw, 72px); }
.hero h1 { max-width: 15ch; }
.hero .lead { max-width: 640px; margin: 24px 0 0; color: var(--ink-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.hero-meta { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; margin-top: 44px; border-top: 1px solid var(--paper-line); }
.hero-meta div { padding: 16px 16px 0 0; }
.hero-meta strong { display: block; font: 700 26px/1.1 var(--font-display); color: var(--ink); }
.hero-meta span { font-size: 14px; color: var(--ink-soft); }
@media (max-width: 640px) { .hero-meta { grid-template-columns: 1fr; } .hero-meta div { padding: 14px 0 0; } }

/* Notes on desk (problem) */
.notes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(16px, 3vw, 28px); }
.note {
  background: var(--paper-shade); color: var(--ink); padding: 26px 24px 28px;
  box-shadow: 6px 8px 0 #0006; position: relative;
}
.note:nth-child(1) { transform: rotate(-1.2deg); }
.note:nth-child(2) { transform: rotate(.8deg); margin-top: 18px; }
.note:nth-child(3) { transform: rotate(-.4deg); }
.note .label { color: var(--signal); }
.note p { margin: 10px 0 0; font-size: 16px; }
@media (max-width: 860px) { .notes { grid-template-columns: 1fr; } .note { transform: none !important; margin-top: 0 !important; } }

/* Split table: AI vs you */
.ledger { width: 100%; border-collapse: collapse; font-size: 16px; }
.ledger th, .ledger td { text-align: left; vertical-align: top; padding: 14px 12px; border-bottom: 1px solid var(--paper-line); }
.ledger thead th { font: 700 12px/1.4 var(--font-label); letter-spacing: .14em; color: var(--ink-soft); border-bottom: 2px solid var(--ink); }
.ledger td:first-child { font-weight: 700; white-space: nowrap; }
.ledger td:last-child { color: var(--signal-deep); }
@media (max-width: 680px) {
  .ledger thead { display: none; }
  .ledger tr { display: block; padding: 14px 0; border-bottom: 1px solid var(--paper-line); }
  .ledger td { display: block; border: 0; padding: 4px 0; }
  .ledger td:nth-child(2)::before { content: "AI가 하는 일 · "; color: var(--ink-faint); }
  .ledger td:nth-child(3)::before { content: "당신이 하는 일 · "; color: var(--ink-faint); }
}

/* Folders (roadmap) */
.folders { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.folder { position: relative; background: #c9a86a; color: var(--ink); padding: 34px 22px 26px; box-shadow: 6px 8px 0 #0007; }
.folder::before { content: ""; position: absolute; left: 0; top: -14px; width: 46%; height: 15px; background: #c9a86a; clip-path: polygon(0 0, 85% 0, 100% 100%, 0 100%); }
.folder .num { font: 700 44px/1 var(--font-display); color: #0000; -webkit-text-stroke: 1.5px var(--ink); }
.folder h3 { margin: 10px 0 8px; }
.folder p { margin: 0; font-size: 15px; line-height: 1.7; }
.folder .vol { margin-top: 14px; color: var(--signal-deep); }
@media (max-width: 760px) { .folders { grid-template-columns: 1fr; row-gap: 34px; } }
@media (max-width: 520px) { .folders { grid-template-columns: 1fr; } }

/* Curriculum */
.volumes { display: grid; gap: 14px; }
.volume { background: var(--paper); color: var(--ink); box-shadow: 6px 6px 0 #0006; }
.volume summary {
  list-style: none; cursor: pointer;
  display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center;
  padding: 22px clamp(18px, 3vw, 30px);
}
.volume summary::-webkit-details-marker { display: none; }
.volume .vol-no { font: 700 34px/1 var(--font-display); color: var(--signal); min-width: 2.2ch; }
.volume .vol-title { font: 700 clamp(19px, 2.4vw, 23px)/1.3 var(--font-display); }
.volume .vol-sub { display: block; font: 400 14px/1.5 var(--font-body); color: var(--ink-soft); margin-top: 4px; }
.volume .toggle { font: 700 22px/1 var(--font-label); transition: transform .2s ease; }
.volume[open] .toggle { transform: rotate(45deg); }
.volume ol { margin: 0; padding: 0 clamp(18px, 3vw, 30px) 26px calc(clamp(18px, 3vw, 30px) + 2.2ch + 18px); border-top: 1px dashed var(--paper-line); padding-top: 18px; }
.volume li { margin: 6px 0; font-size: 16px; }
.volume li .new { color: var(--signal); font: 700 11px/1 var(--font-label); letter-spacing: .1em; margin-left: 6px; vertical-align: 2px; }
@media (max-width: 520px) { .volume ol { padding-left: 38px; } }

/* Challenge timeline */
.days { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); border-top: 2px solid var(--ink); }
.day { padding: 18px 12px 20px; border-right: 1px solid var(--paper-line); position: relative; }
.day:last-child { border-right: 0; }
.day .label { color: var(--ink-faint); }
.day strong { display: block; font: 700 19px/1.25 var(--font-display); margin: 8px 0 6px; }
.day p { margin: 0; font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
.day.feedback::after { content: "피드백"; position: absolute; top: 14px; right: 10px; font: 700 10px/1 var(--font-label); color: var(--signal); border: 1.5px solid var(--signal); padding: 3px 5px; transform: rotate(6deg); }
@media (max-width: 960px) {
  .days { grid-template-columns: 1fr; }
  .day { border-right: 0; border-bottom: 1px solid var(--paper-line); display: grid; grid-template-columns: 80px 1fr; column-gap: 14px; }
  .day .label { grid-row: span 2; padding-top: 4px; }
  .day strong { margin-top: 0; }
}
.rules { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 40px; }
.rules div { border-left: 3px solid var(--signal); padding-left: 16px; }
.rules strong { display: block; font: 700 18px/1.3 var(--font-display); }
.rules p { margin: 6px 0 0; font-size: 15px; color: var(--ink-soft); }
@media (max-width: 760px) { .rules { grid-template-columns: 1fr; } }

/* Pricing */
.prices { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(20px, 3vw, 36px); align-items: start; }
.price { background: var(--paper); color: var(--ink); padding: clamp(26px, 4vw, 40px); box-shadow: var(--shadow-paper); position: relative; }
.price.featured { outline: 3px solid var(--signal); outline-offset: -3px; }
.price .label { color: var(--ink-soft); }
.price h3 { margin: 10px 0 4px; }
.price .amount { font: 700 clamp(38px, 5vw, 52px)/1 var(--font-display); margin: 18px 0 4px; }
.price .amount small { font: 400 15px/1 var(--font-body); color: var(--ink-soft); margin-left: 6px; }
.price .note-line { font-size: 14px; color: var(--ink-soft); min-height: 1.8em; }
.price ul { list-style: none; padding: 0; margin: 22px 0 26px; border-top: 1px solid var(--paper-line); }
.price li { padding: 10px 0 10px 26px; border-bottom: 1px solid var(--paper-line); position: relative; font-size: 15px; }
.price li::before { content: "✓"; position: absolute; left: 2px; color: var(--signal); font-weight: 700; }
.price .stamp { position: absolute; top: 22px; right: 22px; font-size: 13px; }
.price-status { font-size: 13px; color: var(--ink-soft); margin-top: 12px; min-height: 1.6em; }
@media (max-width: 860px) { .prices { grid-template-columns: 1fr; } }

/* Honest box */
.honest { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(24px, 4vw, 48px); }
.honest h3 { margin-bottom: 12px; }
.honest ul { margin: 0; padding-left: 1.2em; }
.honest li { margin: 8px 0; }
@media (max-width: 760px) { .honest { grid-template-columns: 1fr; } }

/* FAQ */
.faq details { border-bottom: 1px solid var(--desk-line); }
.faq summary { cursor: pointer; list-style: none; padding: 22px 40px 22px 0; position: relative; font: 700 clamp(18px, 2.2vw, 21px)/1.4 var(--font-display); }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 20px; font: 700 22px/1 var(--font-label); color: var(--signal); transition: transform .2s ease; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { margin: 0 0 24px; color: var(--on-desk-soft); max-width: 760px; }

/* Lead form */
.lead-box { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(24px, 5vw, 56px); align-items: start; }
.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font: 700 13px/1.4 var(--font-label); letter-spacing: .04em; }
.form input[type=text], .form input[type=email] {
  width: 100%; min-height: 48px; padding: 12px 14px;
  background: #fffaf0; color: var(--ink); border: 1.5px solid var(--ink); border-radius: 0;
  font: 400 16px/1.4 var(--font-body);
}
.form .check { display: flex; gap: 10px; align-items: flex-start; font: 400 14px/1.6 var(--font-body); letter-spacing: 0; }
.form .check input { width: 18px; height: 18px; margin-top: 4px; accent-color: var(--signal); flex-shrink: 0; }
.form .honey { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form .status { min-height: 1.6em; font-size: 14px; margin: 0; }
.form .status.ok { color: #2f6b3a; }
.form .status.err { color: var(--signal); }
@media (max-width: 760px) { .lead-box { grid-template-columns: 1fr; } }

/* Footer */
.footer { border-top: 1px solid var(--desk-line); padding: 48px 0 64px; color: var(--on-desk-soft); font-size: 14px; }
.footer .wrap { display: grid; grid-template-columns: 1fr auto; gap: 24px; }
.footer nav { display: flex; gap: 18px; flex-wrap: wrap; }
.footer a { text-decoration: none; }
.footer a:hover { color: var(--on-desk); }
.biz { margin-top: 16px; line-height: 1.9; font-size: 13px; }
@media (max-width: 640px) { .footer .wrap { grid-template-columns: 1fr; } }

/* Reveal motion */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].is-in { opacity: 1; transform: none; }
.sheet-tilt-l[data-reveal].is-in { transform: rotate(-.6deg); }
.sheet-tilt-r[data-reveal].is-in { transform: rotate(.5deg); }
@media (max-width: 640px) { .sheet-tilt-l[data-reveal].is-in, .sheet-tilt-r[data-reveal].is-in { transform: none; } }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; transition: none; } }
.js-off [data-reveal] { opacity: 1; transform: none; }

/* Dialog */
.dialog { width: min(92vw, 480px); border: 0; padding: 0; background: var(--paper); color: var(--ink); box-shadow: var(--shadow-paper); }
.dialog::backdrop { background: #0d0b09c4; backdrop-filter: blur(4px); }
.dialog-inner { padding: 32px 28px 28px; position: relative; }
.dialog h2 { margin: 0 0 12px; font: 700 26px/1.25 var(--font-display); padding-right: 28px; }
.dialog p { margin: 0 0 16px; font-size: 16px; }
.dialog .close { position: absolute; top: 10px; right: 10px; background: none; border: 0; font: 700 26px/1 var(--font-label); color: var(--ink); cursor: pointer; padding: 6px 10px; }

/* Simple document pages (guide, terms) */
.doc { padding: clamp(32px, 6vw, 72px) 0 clamp(64px, 8vw, 96px); }
.doc .sheet { max-width: 820px; margin-inline: auto; }
.doc h1 { font-size: clamp(32px, 6vw, 52px); }
.doc h2 { font: 700 clamp(24px, 3.4vw, 32px)/1.25 var(--font-display); margin: 48px 0 12px; }
.doc h3 { font: 700 21px/1.3 var(--font-display); margin: 28px 0 8px; }
.doc p, .doc li { font-size: 17px; }
.doc .callout { border-left: 3px solid var(--signal); padding: 4px 0 4px 16px; margin: 24px 0; }
.doc table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 15px; }
.doc th, .doc td { border-bottom: 1px solid var(--paper-line); padding: 10px 8px; text-align: left; vertical-align: top; }
.doc pre { white-space: pre-wrap; background: #fffaf0; border: 1px solid var(--paper-line); padding: 16px; font: 400 14px/1.7 var(--font-label); }
.doc .example { background: #fffaf0; border: 1px solid var(--paper-line); padding: 16px 18px; margin: 24px 0; }
.doc .ex-tag { display: inline-block; margin-bottom: 8px; color: var(--signal); font: 700 12px/1.4 var(--font-label); letter-spacing: .06em; }
.doc .en { border-left: 3px solid var(--ink); padding-left: 14px; margin: 12px 0; }
.doc .en p { font-family: var(--font-label); font-size: 16px; margin: 0 0 6px; }
.doc .ko { color: var(--ink-soft); font-size: 15px; }
.doc .proof { margin: 24px 0; }
.doc .proof img { display: block; width: 100%; height: auto; border: 1px solid var(--paper-line); border-radius: 6px; }
.doc .proof.narrow { max-width: 420px; margin-inline: auto; }
.doc .proof figcaption { margin-top: 8px; color: var(--ink-soft); font-size: 14px; line-height: 1.6; }
.doc .proof figcaption strong { color: var(--signal); }
.doc .table-scroll { overflow-x: auto; }
.todo { background: #b0392b1a; border: 1.5px dashed var(--signal); padding: 14px 16px; font-size: 15px; }

/* Utilities */
.skip { position: absolute; left: -9999px; top: 8px; z-index: 50; background: var(--paper); color: var(--ink); padding: 8px 12px; }
.skip:focus { left: 8px; }
.sheet .lead { color: var(--ink-soft); }
.new-tag { color: var(--signal); font: 700 12px/1 var(--font-label); letter-spacing: .1em; }
.orders { display: grid; gap: 14px; margin: 24px 0; }
.order { border: 1.5px solid var(--ink); padding: 16px 18px; }
.order h2 { margin: 0 0 4px !important; font-size: 22px !important; }
.order p { margin: 0 0 10px; }
.stamp-corner + .file-head { padding-right: 190px; }
@media (max-width: 640px) {
  .stamp-corner { position: static; display: table; margin: 0 0 18px auto; }
  .stamp-corner + .file-head { padding-right: 0; }
}
[id] { scroll-margin-top: 72px; }

/* Challenge (student) */
.form input[type=url], .form textarea {
  width: 100%; min-height: 48px; padding: 12px 14px;
  background: #fffaf0; color: var(--ink); border: 1.5px solid var(--ink); border-radius: 0;
  font: 400 16px/1.6 var(--font-body);
}
.form textarea { resize: vertical; }
.form input:disabled, .form textarea:disabled { background: var(--paper-shade); color: var(--ink-soft); }
.challenge h1 { margin-bottom: 12px; }
.challenge .lead { color: var(--ink-soft); }
.ch-loading { color: var(--ink-soft); }
.ch-back { font: 700 13px/1 var(--font-label); text-decoration: none; color: var(--ink-soft); }
.ch-status { color: var(--signal); margin: 8px 0 20px; }
.ch-days { list-style: none; padding: 0; margin: 28px 0; border-top: 2px solid var(--ink); }
.ch-day { display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--paper-line); }
.ch-day-row { display: grid; grid-template-columns: 72px 1fr; column-gap: 12px; padding: 14px 0; text-decoration: none; color: inherit; flex: 1; }
.ch-day-row .label { color: var(--ink-faint); grid-row: span 2; padding-top: 5px; }
.ch-day-row strong { font: 700 19px/1.3 var(--font-display); }
.ch-day-row small { color: var(--ink-soft); font-size: 13px; }
a.ch-day-row:hover strong { text-decoration: underline; }
.ch-state { font: 700 12px/1 var(--font-label); padding: 5px 8px; border: 1.5px solid currentColor; white-space: nowrap; }
.ch-day.is-locked { opacity: .55; }
.ch-day.is-open .ch-state { color: #fff; background: var(--signal); border-color: var(--signal); }
.ch-day.is-submitted .ch-state { color: #2f6b3a; }
.ch-day.is-closed .ch-state { color: var(--ink-faint); }
.ch-tasks { list-style: none; padding: 0; }
.ch-tasks label { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; cursor: pointer; }
.ch-tasks input { width: 18px; height: 18px; margin-top: 6px; accent-color: var(--signal); flex-shrink: 0; }
.ch-help { display: block; font: 400 13px/1.6 var(--font-body); color: var(--ink-soft); letter-spacing: 0; }
.ch-count { font: 400 12px/1 var(--font-label); color: var(--ink-faint); text-align: right; }
.ch-form label { gap: 8px; }
.ch-feedback { position: relative; border: 2px solid var(--signal); padding: 28px 18px 16px; margin: 24px 0; background: #b0392b0d; }
.ch-feedback .stamp { position: absolute; top: -16px; left: 14px; background: var(--paper); font-size: 12px; transform: rotate(-3deg); }
.ch-feedback p { margin: 0; white-space: pre-line; }
@media (max-width: 520px) { .ch-day-row { grid-template-columns: 56px 1fr; } }
mark.ph { background: #b0392b26; color: var(--signal-deep); padding: 0 .2em; font-weight: 700; }
.refund-notice { font-size: 14px; color: var(--ink-soft); border-left: 3px solid var(--signal); padding-left: 12px; }

/* Single offer card + AI execution kit order bump */
.prices-one { grid-template-columns: minmax(0, 620px); justify-content: center; }
.bump-preview { margin-top: 18px; padding: 14px 16px; border: 1px dashed var(--paper-line); font-size: 14px; color: var(--ink-soft); display: grid; gap: 4px; }
.bump-preview strong { color: var(--ink); }
.bump { display: flex; gap: 12px; align-items: flex-start; margin: 0 0 16px; padding: 14px 16px; border: 2px dashed var(--signal); cursor: pointer; }
.bump input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--signal); flex-shrink: 0; }
.bump span { display: grid; gap: 4px; font-size: 14px; color: var(--ink-soft); }
.bump strong { font-size: 16px; color: var(--ink); }

/* A hidden offer must stay hidden despite component display rules. */
[hidden] { display: none !important; }
#challenge-offer h2 { font-size: clamp(1.35rem, 3.5vw, 2rem); line-height: 1.45; }
#challenge-offer .label { white-space: normal; overflow-wrap: anywhere; }