:root {
  --ink: #171913;
  --paper: #f2f0e8;
  --panel: #fffef8;
  --acid: #c7ff45;
  --line: #cac8be;
  --muted: #686b61;
  --danger: #9f2f24;
}

* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, sans-serif; }
body { margin: 0; min-height: 100vh; }
a { color: inherit; }
.shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
.masthead { height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; font-weight: 800; letter-spacing: -.03em; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; background: var(--ink); color: var(--acid); font: 800 13px ui-monospace, monospace; }
nav { display: flex; gap: 24px; align-items: center; }
nav a { text-decoration: none; font-size: 14px; font-weight: 650; }
.button { border: 1px solid var(--ink); background: var(--ink); color: white; display: inline-flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 48px; padding: 0 20px; text-decoration: none; font-weight: 750; cursor: pointer; }
.button:hover { color: var(--ink); background: var(--acid); }
.button.small { min-height: 36px; padding: 0 14px; color: var(--ink); background: var(--acid); }
.hero { min-height: 440px; display: flex; align-items: flex-end; justify-content: space-between; gap: 80px; padding: 92px 0 64px; }
.eyebrow { font: 700 12px ui-monospace, monospace; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 20px; }
h1 { font-size: clamp(54px, 8vw, 104px); line-height: .88; letter-spacing: -.075em; margin: 0; max-width: 900px; }
h1 em { font-family: Georgia, serif; font-weight: 400; }
.lede { color: var(--muted); max-width: 680px; font-size: 18px; line-height: 1.55; margin: 30px 0 0; }
.hero-button { min-width: 230px; margin-bottom: 8px; }
.panel { background: var(--panel); border: 1px solid var(--line); }
.panel-head { padding: 22px 24px; display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid var(--line); }
.panel-head h2 { margin: 0; font-size: 18px; }
.panel-head span, .panel-head a { color: var(--muted); font-size: 13px; }
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 18px 20px; border-bottom: 1px solid #dedcd3; text-align: left; }
th { color: var(--muted); font: 650 11px ui-monospace, monospace; text-transform: uppercase; letter-spacing: .08em; }
tbody tr:last-child td { border: 0; }
.rank, .score { font: 750 17px ui-monospace, monospace; }
.entry { font-weight: 750; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.muted { color: var(--muted); font-size: 12px; }
.block { display: block; margin-top: 5px; max-width: 500px; }
.status { display: inline-flex; border: 1px solid var(--line); border-radius: 99px; padding: 5px 9px; font: 700 10px ui-monospace, monospace; text-transform: uppercase; }
.status.succeeded { background: var(--acid); color: var(--ink); border-color: var(--ink); }
.status.failed { color: var(--danger); border-color: var(--danger); }
.empty { padding: 50px; text-align: center; color: var(--muted); }
.submit-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; padding: 100px 0 70px; align-items: end; }
.submit-grid h1 { font-size: clamp(50px, 7vw, 88px); }
.rules { display: grid; grid-template-columns: 34px 1fr; gap: 15px 12px; margin-top: 35px; max-width: 680px; }
.rules span { font: 700 11px ui-monospace, monospace; color: var(--muted); padding-top: 3px; }
.rules p { margin: 0; line-height: 1.45; }
.upload-card { background: var(--acid); border: 1px solid var(--ink); padding: 28px; min-height: 380px; display: flex; flex-direction: column; justify-content: space-between; gap: 24px; box-shadow: 10px 10px 0 var(--ink); }
.upload-card h2 { font-size: 28px; margin: 16px 0 6px; }
.upload-card p { margin: 0; }
.file-kicker { display: grid; place-items: center; width: 48px; height: 48px; background: var(--ink); color: var(--acid); font: 800 13px ui-monospace, monospace; }
.file-field { background: rgba(255,255,255,.55); border: 1px dashed var(--ink); min-height: 90px; display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: 16px; font-weight: 700; }
.file-field input { max-width: 100%; }
.text-field { display: grid; gap: 8px; font-weight: 700; font-size: 13px; }
.text-field input, .text-field select { width: 100%; min-height: 46px; border: 1px solid var(--ink); background: rgba(255,255,255,.72); padding: 0 12px; font: 14px ui-monospace, monospace; }
.tier-note { background: rgba(255,255,255,.55); border-left: 3px solid var(--ink); padding: 12px; font-size: 12px; line-height: 1.5; }
.form-note { font-size: 12px; line-height: 1.5; }
.contract { margin: 0 0 70px; }
.depth-guide { margin: 0 0 70px; }
.depth-body { padding: 26px; display: grid; grid-template-columns: 1fr 1fr; gap: 45px; border-bottom: 1px solid var(--line); line-height: 1.6; }
.depth-body > p { margin: 0; color: var(--muted); }
.depth-flow { margin: 0; padding-left: 22px; display: grid; gap: 12px; }
.depth-question { padding: 26px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 45px; background: var(--acid); border-bottom: 1px solid var(--ink); }
.depth-question h3 { margin: 0; font: 400 30px/1.1 Georgia, serif; }
.depth-question p { margin: 0; line-height: 1.6; }
.example-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.example { min-width: 0; border-right: 1px solid var(--line); }
.example:last-child { border-right: 0; }
.example h3 { margin: 0; padding: 22px 22px 5px; font-size: 16px; }
.example p { min-height: 58px; margin: 0; padding: 0 22px 18px; color: var(--muted); font-size: 13px; line-height: 1.45; }
.example pre { height: calc(100% - 105px); padding: 20px; font-size: 11px; }
.depth-boundary { border-top: 1px solid var(--line); padding: 24px; line-height: 1.6; font-size: 14px; }
pre { margin: 0; padding: 28px; overflow: auto; background: #1c1e19; color: #e8ebde; font: 13px/1.65 ui-monospace, SFMono-Regular, monospace; }
code { font-family: ui-monospace, SFMono-Regular, monospace; }
.detail-hero { display: flex; justify-content: space-between; gap: 50px; padding: 100px 0 70px; align-items: end; }
.detail-hero h1 { font-size: clamp(48px, 7vw, 86px); }
.score-card { min-width: 240px; padding: 24px; background: var(--ink); color: white; display: grid; gap: 12px; }
.score-card > span:first-child { color: #b7baae; font-size: 12px; text-transform: uppercase; }
.score-card strong { font: 800 42px ui-monospace, monospace; color: var(--acid); }
.facts { display: grid; grid-template-columns: repeat(5, 1fr); margin-bottom: 28px; }
.facts div { padding: 22px; border-right: 1px solid var(--line); display: grid; gap: 8px; }
.facts div:last-child { border: 0; }
.facts span { color: var(--muted); font: 700 10px ui-monospace, monospace; text-transform: uppercase; }
.facts strong { overflow-wrap: anywhere; }
.error { background: #fff0ec; border: 1px solid var(--danger); color: var(--danger); padding: 14px; font-size: 13px; line-height: 1.5; }
.register-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 80px; padding: 100px 0 70px; align-items: end; }
.register-grid h1 { font-size: clamp(50px, 7vw, 88px); }
.register-card { min-height: 430px; }
.registration-pending { border: 1px dashed var(--ink); background: rgba(255,255,255,.55); padding: 20px; line-height: 1.5; display: grid; gap: 4px; }
.registration-pending span { color: var(--muted); font: 700 10px ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; }
.registration-pending strong { font-size: 18px; }
.registration-pending small { color: var(--muted); font-size: 12px; }
.notice { padding: 14px 20px; border-bottom: 1px solid var(--line); background: #fff6d8; color: var(--muted); font-size: 12px; line-height: 1.5; }
footer { color: var(--muted); font-size: 12px; padding: 38px 0 50px; }
footer .support { display: block; margin-top: 10px; }
footer a { text-underline-offset: 3px; }

@media (max-width: 760px) {
  .shell { width: min(100% - 24px, 1180px); }
  .masthead { height: 68px; }
  nav > a:first-child { display: none; }
  .hero, .detail-hero { min-height: 0; align-items: stretch; flex-direction: column; padding: 70px 0 45px; gap: 40px; }
  .hero-button { align-self: flex-start; }
  .submit-grid, .register-grid { grid-template-columns: 1fr; gap: 45px; padding: 70px 0 55px; }
  .upload-card { min-height: 340px; box-shadow: 6px 6px 0 var(--ink); }
  .facts { grid-template-columns: 1fr; }
  .depth-body, .depth-question, .example-grid { grid-template-columns: 1fr; }
  .example { border-right: 0; border-bottom: 1px solid var(--line); }
  .example:last-child { border-bottom: 0; }
  .example p { min-height: 0; }
  .example pre { height: auto; }
  .facts div { border-right: 0; border-bottom: 1px solid var(--line); }
  .score-card { min-width: 0; }
}