:root {
  --paper: #f3eee5;
  --ink: #17191e;
  --oxblood: #6b1f2a;
  --steel: #555b66;
  --pearl: #e8e0d2;
  --carbon: #0d0f13;
  --rule: 1px solid var(--ink);
  --wide: 1240px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font: 15px/1.5 "Inter", sans-serif; }
button, textarea { font: inherit; }
a { color: inherit; text-underline-offset: 4px; }
img { display: block; width: 100%; height: auto; }
h1, h2, h3, p, blockquote, figure { margin-top: 0; }
h1, h2, h3 { font-weight: 600; letter-spacing: -.045em; }
h1 em, h2 em { color: var(--oxblood); font-family: "Source Serif 4", serif; font-weight: 700; }
.skip-link { position: fixed; top: 10px; left: 10px; z-index: 20; padding: 9px 12px; color: var(--paper); background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.topbar { min-height: 52px; padding: 11px max(22px, calc((100vw - var(--wide)) / 2 + 26px)); display: flex; justify-content: space-between; align-items: center; gap: 20px; border-bottom: var(--rule); }
.wordmark { font: 700 15px/1 Helvetica, Arial, sans-serif; letter-spacing: -.03em; text-decoration: none; }
.wordmark span { margin-left: 8px; font: 500 10px/1 "JetBrains Mono", monospace; letter-spacing: .12em; }
.sponsor-chip { padding: 7px 10px; border: 1px solid var(--oxblood); color: var(--oxblood); font: 500 10px/1 "JetBrains Mono", monospace; letter-spacing: .08em; text-decoration: none; }
.sponsor-chip:hover, .sponsor-chip:focus-visible { color: var(--paper); background: var(--oxblood); }
.topbar-meta, .eyebrow, .lesson-number, .side-note, .prompt-card-heading span, .feedback, footer { font-family: "JetBrains Mono", monospace; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.hero { max-width: var(--wide); margin: 0 auto; padding: clamp(36px, 5vw, 60px) 26px; display: grid; grid-template-columns: .86fr 1.14fr; gap: clamp(28px, 4vw, 52px); align-items: center; border-inline: var(--rule); }
.kicker { margin-bottom: 18px; font: 500 11px/1.5 "JetBrains Mono", monospace; letter-spacing: .08em; text-transform: uppercase; }
h1 { max-width: 590px; margin-bottom: 17px; font-size: clamp(42px, 5.2vw, 66px); line-height: .96; }
.dek { max-width: 530px; margin-bottom: 0; font-size: clamp(17px, 1.7vw, 21px); line-height: 1.34; letter-spacing: -.015em; }
.hero-actions { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 8px; }
.hero-visual { margin: 0; border: var(--rule); background: var(--carbon); }
.hero-visual img { aspect-ratio: 16 / 9; object-fit: contain; }
.button { min-height: 38px; padding: 9px 13px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--ink); color: var(--ink); background: transparent; font-size: 13px; font-weight: 600; text-decoration: none; cursor: pointer; }
.button:hover, .button:focus-visible { color: var(--paper); background: var(--oxblood); border-color: var(--oxblood); }
.button-primary { color: var(--paper); background: var(--ink); }
.button-light { color: var(--ink); background: var(--paper); border-color: var(--paper); }
.text-link { font-weight: 600; }
.section-rule, .lessons, .things-to-try, .listen, footer { max-width: var(--wide); margin: 0 auto; padding: clamp(34px, 4.5vw, 54px) 26px; border: var(--rule); border-top: 0; }
.eyebrow { margin-bottom: 12px; color: var(--oxblood); font-weight: 500; }
.sponsor-note { padding-block: 18px; display: flex; justify-content: space-between; align-items: center; gap: 26px; background: var(--pearl); }
.sponsor-note p { max-width: 850px; margin: 0; color: var(--steel); font-size: 13px; }
.sponsor-note p span { color: var(--ink); font-weight: 600; }
.sponsor-note .text-link { flex: 0 0 auto; font-size: 13px; }
.opening { display: grid; grid-template-columns: .86fr 1.14fr; gap: clamp(30px, 5vw, 70px); align-items: start; }
.opening h2, .section-heading h2, .listen h2 { margin-bottom: 0; font: italic 700 clamp(28px, 3.5vw, 42px)/1 "Source Serif 4", serif; letter-spacing: -.04em; }
.opening > div:last-child > p:first-child { margin-bottom: 12px; font-size: 15px; }
.source-check { margin: 18px 0 0; color: var(--steel); font: 11px/1.55 "JetBrains Mono", monospace; }
.section-heading { margin-bottom: 26px; }
.section-heading h2 { max-width: 820px; }
.lessons { padding-bottom: clamp(34px, 4.5vw, 54px); display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
.lessons .section-heading { grid-column: 1 / -1; }
.lesson { min-width: 0; border-top: var(--rule); border-right: var(--rule); }
.lesson:last-child { border-right: 0; }
.lesson-copy { padding: 26px 24px 4px; }
.lesson-number { display: block; margin-bottom: 15px; color: var(--oxblood); }
.lesson h3 { max-width: 580px; margin-bottom: 12px; font-size: clamp(23px, 2.3vw, 30px); line-height: 1.05; }
.lesson-copy > p:not(.try-this) { max-width: 620px; margin-bottom: 0; font-size: 14px; }
blockquote { max-width: 640px; margin: 22px 0 0; padding-top: 15px; border-top: 2px solid var(--oxblood); font: italic 600 clamp(18px, 1.7vw, 22px)/1.22 "Source Serif 4", serif; letter-spacing: -.02em; }
blockquote cite { margin-top: 14px; display: block; color: var(--steel); font: 500 10px/1.5 "JetBrains Mono", monospace; letter-spacing: .07em; text-transform: uppercase; }
.try-this { max-width: 640px; margin: 20px 0 0; padding-top: 13px; border-top: 1px solid var(--ink); font-size: 13px; }
.try-this strong { color: var(--oxblood); }
.lesson-visual { min-height: 100%; margin: 0; display: flex; align-items: center; background: var(--carbon); }
.lesson-visual img { width: 100%; height: auto; object-fit: contain; }
.split-heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.side-note { max-width: 360px; margin-bottom: 4px; color: var(--steel); line-height: 1.55; }
.brief-builder { background: var(--pearl); }
.brief-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.brief-grid label { padding: 14px; display: flex; flex-direction: column; gap: 8px; border: var(--rule); background: var(--paper); }
.brief-grid label > span { min-height: 22px; font: 500 10px/1.45 "JetBrains Mono", monospace; letter-spacing: .08em; }
textarea { width: 100%; min-height: 72px; padding: 9px 0; resize: vertical; border: 0; border-top: 1px solid var(--ink); border-radius: 0; color: var(--ink); background: transparent; font-size: 13px; line-height: 1.45; }
textarea:focus { outline: 2px solid var(--oxblood); outline-offset: 4px; }
.brief-actions { margin-top: 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.text-button { padding: 7px 0; border: 0; border-bottom: 1px solid currentColor; color: var(--ink); background: transparent; cursor: pointer; }
.feedback { min-height: 16px; color: var(--oxblood); }
.things-to-try { color: var(--paper); background: var(--ink); }
.things-to-try .eyebrow, .things-to-try .section-heading h2 { color: var(--paper); }
.things-to-try .side-note { color: #c7c2b8; }
.prompt-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.prompt-card { border: 1px solid #64676e; background: var(--carbon); }
.prompt-card-featured { border-color: var(--paper); }
.prompt-card-heading { padding: 14px; display: flex; justify-content: space-between; align-items: flex-start; gap: 14px; border-bottom: 1px solid #64676e; }
.prompt-card-heading span { color: #bdb8ae; }
.prompt-card-heading h3 { margin: 4px 0 0; font-size: 19px; line-height: 1.1; }
.copy-prompt { padding: 8px 10px; flex: 0 0 auto; border: 1px solid var(--paper); color: var(--paper); background: transparent; font: 500 10px/1 "JetBrains Mono", monospace; letter-spacing: .08em; cursor: pointer; }
.copy-prompt:hover, .copy-prompt:focus-visible { color: var(--ink); background: var(--paper); }
.prompt-card pre { margin: 0; padding: 16px 14px; overflow-x: auto; white-space: pre-wrap; color: #e9e4da; font: 11px/1.55 "JetBrains Mono", monospace; }
.prompt-feedback { display: block; padding: 0 18px 14px; color: var(--paper); }
.listen { display: grid; grid-template-columns: 1.3fr .7fr; gap: clamp(32px, 5vw, 70px); align-items: center; color: var(--paper); background: var(--oxblood); border-color: var(--oxblood); }
.listen .eyebrow { color: var(--paper); }
.listen h2 { max-width: 760px; }
.listen-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 13px; }
footer { display: grid; grid-template-columns: 1.25fr .75fr; gap: 32px; color: var(--paper); background: var(--carbon); border-color: var(--carbon); }
footer strong { font-size: 10px; font-weight: 500; }
footer p { margin: 8px 0 0; color: #bdb8ae; font-size: 10px; line-height: 1.55; letter-spacing: .03em; text-transform: none; }
.image-note { grid-column: 1 / -1; padding-top: 18px; border-top: 1px solid #44474d; }
@media (max-width: 860px) {
  .hero, .opening, .listen { grid-template-columns: 1fr; }
  .lessons, .prompt-list { grid-template-columns: 1fr; }
  .lesson { border-right: 0; }
  .sponsor-note { align-items: flex-start; }
  .hero-visual { margin-top: 8px; }
  .lesson-copy { border: 0 !important; }
  .lesson-visual { border-top: var(--rule); }
  .split-heading { display: block; }
  .side-note { margin-top: 16px; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .topbar { padding-inline: 18px; }
  .topbar-meta, .wordmark span { display: none; }
  .sponsor-chip { margin-left: auto; }
  .hero, .section-rule, .lessons, .things-to-try, .listen, footer { padding-inline: 18px; }
  .hero { padding-block: 42px; }
  h1 { font-size: clamp(44px, 14vw, 60px); }
  .lesson { margin-inline: -18px; }
  .lesson-copy { padding-inline: 18px; }
  .brief-grid { grid-template-columns: 1fr; }
  .prompt-card-heading { align-items: flex-start; }
  .prompt-card pre { font-size: 11px; }
  footer { grid-template-columns: 1fr; }
}
@media print {
  .topbar, .hero-actions, .brief-actions, .copy-prompt { display: none; }
  body { background: white; }
  .hero, .section-rule, .lessons, .things-to-try, .listen, footer { border-inline: 0; }
  .lesson, .prompt-card, .brief-grid label { break-inside: avoid; }
}