:root {
  --paper: #faf6ee;
  --card: #ffffff;
  --ink: #1b2330;
  --muted: #566070;
  --line: #e4dccc;
  --line-strong: #cfc4ae;
  --accent: #c2410c;
  --accent-dark: #9a3412;
  --accent-soft: #fdeee3;
  --ok: #0f766e;
  --ok-soft: #e4f4f1;
  --bad: #b91c1c;
  --bad-soft: #fdeceb;
  --display: "Bricolage Grotesque", "Source Sans 3", system-ui, sans-serif;
  --body: "Source Sans 3", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, "Courier New", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--ink);
  background: var(--paper);
}
a { color: var(--accent-dark); text-underline-offset: 2px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.15; letter-spacing: -0.01em; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
[hidden] { display: none !important; }

/* Keycaps: the site's one visual idea */
.key {
  display: inline-flex; align-items: center; justify-content: center;
  width: 1.9em; height: 1.9em;
  font-family: var(--display); font-weight: 700; line-height: 1;
  color: var(--ink); background: var(--card);
  border: 2px solid var(--ink); border-bottom-width: 5px; border-radius: 0.4em;
}
.key.hot { color: #fff; background: var(--accent); border-color: var(--accent-dark); }

/* Header */
.top {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 8px 16px; padding: 12px 20px;
  background: var(--paper); border-bottom: 1px solid var(--line);
}
.brand { display: flex; gap: 12px; align-items: center; min-width: 0; }
.logo {
  display: inline-flex; align-items: center; justify-content: center; flex: none;
  width: 40px; height: 42px;
  font-family: var(--display); font-weight: 800; font-size: 1.25rem; line-height: 1;
  color: #fff; background: var(--accent);
  border: 2px solid var(--accent-dark); border-bottom-width: 5px; border-radius: 9px;
}
.title { font-family: var(--display); font-weight: 700; font-size: 1.1rem; line-height: 1.2; }
.sub { color: var(--muted); font-size: 0.9rem; line-height: 1.2; }
nav { display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: center; }
nav a { color: var(--ink); font-weight: 600; font-size: 1rem; text-decoration: none; padding: 6px 0; }
nav a:hover { color: var(--accent-dark); text-decoration: underline; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 46px; padding: 8px 18px;
  font: inherit; font-weight: 700; text-decoration: none; text-align: center; cursor: pointer;
  color: var(--ink); background: var(--card);
  border: 2px solid var(--ink); border-bottom-width: 4px; border-radius: 10px;
}
.btn:hover { background: var(--accent-soft); }
.btn:active { transform: translateY(2px); border-bottom-width: 2px; margin-bottom: 2px; }
.btn.primary { color: #fff; background: var(--accent); border-color: var(--accent-dark); }
.btn.primary:hover { background: var(--accent-dark); }
.btn.small { min-height: 36px; padding: 3px 12px; font-size: 0.95rem; border-width: 1.5px; border-bottom-width: 3px; }
.btn:disabled { opacity: 0.55; cursor: default; transform: none; }
nav .btn { min-height: 40px; padding: 4px 14px; }
.link-btn {
  padding: 4px 0; font: inherit; font-size: 0.975rem; font-weight: 600; cursor: pointer;
  color: var(--accent-dark); background: none; border: 0; text-decoration: underline; text-underline-offset: 2px;
  justify-self: start;
}

/* Home */
.hero { max-width: 880px; margin: 0 auto; padding: 44px 20px 36px; }
.keyrow { display: flex; flex-wrap: wrap; gap: 5px; margin: 0 0 24px; font-size: clamp(0.92rem, 3.1vw, 1.3rem); }
.hero h1 { margin: 0 0 14px; font-size: clamp(2.2rem, 7vw, 3.75rem); font-weight: 800; line-height: 1.04; }
.hero h1 span { color: var(--accent); }
.hero p { max-width: 38rem; margin: 0; font-size: 1.2rem; color: var(--muted); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }
.steps {
  display: grid; gap: 14px; max-width: 880px; margin: 0 auto; padding: 8px 20px 36px;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  list-style: none;
}
.steps li { padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.steps .key { margin-bottom: 12px; font-size: 1.05rem; }
.steps h3 { margin: 0 0 6px; font-size: 1.15rem; }
.steps p { margin: 0; font-size: 1rem; color: var(--muted); }
.panel { max-width: 880px; margin: 0 auto; padding: 8px 20px 36px; }
.panel h2 { margin: 0 0 10px; font-size: 1.6rem; }
.panel ul { margin: 0 0 12px; padding-left: 20px; }
.panel li { margin-bottom: 4px; }

/* Text */
.fine { font-size: 0.975rem; color: var(--muted); }
.label { margin: 0; font-size: 0.9rem; font-weight: 600; color: var(--muted); }
.sponsors { padding: 22px 20px; text-align: center; border-top: 1px solid var(--line); }
.strip { margin-top: 2px; font-weight: 700; }
.strip.muted { font-weight: 500; color: var(--muted); }
.foot { display: grid; gap: 6px; padding: 22px 20px 34px; font-size: 0.975rem; color: var(--muted); border-top: 1px solid var(--line); }
.foot a { color: var(--muted); }

/* Forms */
.form {
  display: grid; gap: 14px; width: calc(100% - 32px); max-width: 480px;
  margin: 28px auto 36px; padding: 24px;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
}
.form h1, .form h2 { margin: 0; font-size: 1.75rem; }
.form > p { margin: 0; }
.form label, .grid-form label { display: grid; gap: 5px; font-weight: 700; font-size: 1rem; }
input, select, textarea {
  width: 100%; min-width: 0; min-height: 46px; padding: 9px 12px;
  font: inherit; font-weight: 400; color: var(--ink); background: #fff;
  border: 1.5px solid var(--line-strong); border-radius: 9px;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent); outline: 2px solid var(--accent); outline-offset: 0; }
input[type="checkbox"] { width: 20px; min-height: 20px; height: 20px; flex: none; margin: 2px 0 0; accent-color: var(--accent); }
.hint { font-weight: 400; color: var(--muted); }
.form .check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 0.975rem; color: var(--ink); }
.code-input { font-family: var(--mono); font-size: 1.5rem; letter-spacing: 0.18em; text-align: center; }
.code-step { display: grid; gap: 12px; }
.msg { padding: 11px 14px; font-size: 1rem; background: var(--paper); border-left: 4px solid var(--line-strong); border-radius: 6px; overflow-wrap: anywhere; }
.msg.ok { background: var(--ok-soft); border-color: var(--ok); }
.msg.err { background: var(--bad-soft); border-color: var(--bad); }

/* Teacher portal */
.portal { display: grid; gap: 16px; max-width: 1040px; margin: 24px auto; padding: 0 16px 28px; }
.card { min-width: 0; padding: 22px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; }
.card h1 { margin: 0 0 6px; font-size: 1.9rem; }
.card h2 { margin: 0 0 6px; font-size: 1.4rem; }
.card .fine { margin: 4px 0; overflow-wrap: anywhere; }
.card .msg { margin-top: 12px; }
.row-between { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 12px; }
.grid-form { display: grid; gap: 12px; align-items: end; margin-top: 10px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.grid-form .wide { grid-column: 1 / -1; }
.grid-form textarea { font-family: var(--mono); font-size: 0.95rem; }
.paste { margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); }
.paste summary { font-weight: 700; color: var(--accent-dark); cursor: pointer; }
.failures { margin: 8px 0 0; padding-left: 20px; color: var(--bad); overflow-wrap: anywhere; }
.join-code { margin: 10px 0 2px; font-family: var(--mono); font-size: clamp(1.6rem, 6vw, 2.2rem); font-weight: 700; letter-spacing: 0.14em; color: var(--accent-dark); overflow-wrap: anywhere; }
.join-code.closed { color: var(--muted); text-decoration: line-through; }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.search { width: auto; flex: 1 1 200px; max-width: 320px; }
.table-wrap { margin-top: 10px; overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 1rem; }
.table th { font-size: 0.9rem; font-weight: 700; text-align: left; color: var(--muted); }
.table th, .table td { padding: 9px 10px; white-space: nowrap; border-bottom: 1px solid var(--line); }
.changed { display: block; font-size: 0.875rem; color: var(--accent-dark); }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.center { text-align: center; }
.result-list { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.result-list li {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px;
  padding: 10px 12px; background: var(--paper); border: 1px solid var(--line); border-radius: 10px; overflow-wrap: anywhere;
}
.card .result-list { margin: 10px 0 12px; }
.dialog { width: min(480px, calc(100vw - 24px)); padding: 0; color: var(--ink); background: var(--card); border: 1px solid var(--line-strong); border-radius: 16px; }
.dialog::backdrop { background: rgba(27, 35, 48, 0.55); }
.dialog .form { width: 100%; margin: 0; border: 0; }

/* Practice */
.stage { max-width: 760px; margin: 24px auto; padding: 0 16px 32px; }
.passage { min-height: 120px; margin-bottom: 12px; padding: 18px; font-size: 1.2rem; color: var(--muted); background: var(--card); border: 1px solid var(--line); border-radius: 12px; }
.passage .done { color: var(--ok); }
.passage .curr { color: #fff; background: var(--accent); border-radius: 2px; }
.passage .bad { color: var(--bad); background: var(--bad-soft); }
textarea.input { min-height: 110px; font-size: 1.1rem; }
.stats { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 22px; margin-top: 12px; }

/* Rules, consent, privacy */
.doc { max-width: 760px; margin: 0 auto; padding: 28px 20px 36px; overflow-wrap: anywhere; }
.doc h1 { margin: 0 0 8px; font-size: 2.2rem; }
.doc h2 { margin: 28px 0 8px; font-size: 1.35rem; }
.doc li { margin-bottom: 4px; }
.doc hr { margin: 40px 0; border: 0; border-top: 1px solid var(--line-strong); }
.sample { padding: 18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; }

@media (max-width: 640px) {
  .top { padding: 10px 16px; }
  .hero { padding-top: 28px; }
  .form { margin-top: 16px; padding: 18px; }
  .card { padding: 16px; }
  .search { max-width: none; width: 100%; }
  .table thead { display: none; }
  .table tr { display: block; padding: 10px 0; border-bottom: 1px solid var(--line); }
  .table td { display: block; padding: 2px 0; white-space: normal; border: 0; overflow-wrap: anywhere; }
  .table td:first-child { font-weight: 700; }
  .table td.actions { display: flex; margin-top: 8px; }
}

@media print {
  .top, .foot, .sponsors { display: none; }
  body, .sample { background: #fff; }
}