/* The pages anyone can open before signing in: the front page (welcome.html) and "Try a few questions" (try.html). */
:root { --bg: #fff; --ink: #191919; --muted: #6b6b6b; --line: #e9e9e7; --btn: #191919; --btn-ink: #fff; --frame: #f7f7f5; --soft: #f7f7f5;
  --right: #2E8A47; color-scheme: light; }
:root[data-theme="dark"] { --bg: #191919; --ink: #f1f1ef; --muted: #9b9b9b; --line: #2f2f2f; --btn: #f1f1ef; --btn-ink: #191919;
  --frame: #202020; --soft: #232323; color-scheme: dark; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --bg: #191919; --ink: #f1f1ef; --muted: #9b9b9b; --line: #2f2f2f; --btn: #f1f1ef; --btn-ink: #191919;
    --frame: #202020; --soft: #232323; color-scheme: dark; }
}
* { box-sizing: border-box; }
html, body { overflow-x: hidden; }
body { margin: 0; background: var(--bg); color: var(--ink); font-family: Inter, "Segoe UI", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.jbr { width: 30px; height: 30px; display: block; flex: none; }
/* the JBR logo: dark ink in light mode, light ink in dark mode */
.jbr-ink { fill: #000; }
.jbr-ring { stroke: #000; }
:root[data-theme="dark"] .jbr-ink { fill: #fff; }
:root[data-theme="dark"] .jbr-ring { stroke: #fff; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .jbr-ink { fill: #fff; }
  :root:not([data-theme="light"]) .jbr-ring { stroke: #fff; }
}
.nav-r { display: flex; align-items: center; gap: 6px; font-size: .9rem; }
.nav-r a { padding: 6px 10px; border-radius: 6px; }
.nav-r a:hover { background: var(--soft); }
.nav-r a.solid, .nav-r a.solid:hover { background: var(--btn); color: var(--btn-ink); font-weight: 500; padding: 6px 12px; }

.b { font: inherit; display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 18px; border-radius: 8px;
  font-weight: 500; font-size: 1rem; border: 0; cursor: pointer; background: transparent; color: var(--ink); }
.b.solid { background: var(--btn); color: var(--btn-ink); }
.b.solid:hover { opacity: .88; }
.b.line { border: 1px solid var(--line); }
.b.line:hover { background: var(--soft); }
.b.text { color: var(--muted); }
.b.text:hover { color: var(--ink); }
.b:focus-visible, .nav-r a:focus-visible, .mk:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* front page */
.hero { text-align: center; padding: 96px 0 56px; }
.hero h1 { font-size: 4rem; line-height: 1.05; letter-spacing: -.035em; font-weight: 700; margin: 0; }
.sub { font-size: 1.35rem; color: var(--muted); margin: 18px 0 32px; font-weight: 450; letter-spacing: -.01em; }
.acts { display: flex; justify-content: center; gap: 12px; align-items: center; }
.shot { border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--frame); padding: 10px; }
.shot img { display: block; width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--line); }
.subjects { text-align: center; padding: 64px 0 24px; }
.subjects p { margin: 0 0 18px; color: var(--muted); font-size: .9rem; }
.subjects ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 28px; font-weight: 600;
  font-size: 1.05rem; color: var(--muted); max-width: 820px; margin: 0 auto; }
footer { border-top: 1px solid var(--line); margin-top: 72px; padding: 28px 0 40px; display: flex; justify-content: space-between; gap: 12px;
  flex-wrap: wrap; font-size: .85rem; color: var(--muted); }
footer .links { display: flex; flex-wrap: wrap; row-gap: 6px; }
footer .links a, footer .links button { margin-left: 18px; }
footer button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
footer a:hover, footer button:hover { color: var(--ink); }

/* try a few questions */
.try { max-width: 760px; margin: 0 auto; padding: 40px 24px 0; }
.try .step { color: var(--muted); font-size: .9rem; margin: 0 0 6px; }
.try h1 { font-size: 1.9rem; letter-spacing: -.025em; margin: 0 0 4px; }
.try .paper { color: var(--muted); margin: 0 0 22px; }
.sheet { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 18px 18px 10px; }
.sheet img { display: block; width: 100%; height: auto; }
/* paper scans are black on white; in dark mode they're turned light on dark */
:root[data-theme="dark"] .sheet { background: #1f1f1f; }
:root[data-theme="dark"] .sheet img { filter: invert(.88) hue-rotate(180deg); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .sheet { background: #1f1f1f; }
  :root:not([data-theme="light"]) .sheet img { filter: invert(.88) hue-rotate(180deg); }
}
.label { font-size: .85rem; font-weight: 600; color: var(--muted); margin: 26px 0 8px; }
.marks { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.mk { font: inherit; width: 44px; height: 44px; border-radius: 8px; border: 1px solid var(--line); background: var(--bg); color: var(--ink);
  font-weight: 600; cursor: pointer; }
.mk:hover { background: var(--soft); }
.mk[aria-pressed="true"] { background: var(--btn); color: var(--btn-ink); border-color: var(--btn); }
.marks .of { color: var(--muted); margin-left: 4px; }
.row { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 28px; }
.dots { display: flex; gap: 6px; }
.dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--line); }
.dots i.on { background: var(--ink); }

.done { text-align: center; padding-top: 40px; }
.done h1 { font-size: 2.6rem; }
.done .score { font-size: 1.2rem; color: var(--muted); margin: 10px 0 28px; }
.recap { list-style: none; padding: 0; margin: 0 auto 32px; max-width: 420px; text-align: left; border-top: 1px solid var(--line); }
.recap li { display: flex; justify-content: space-between; padding: 12px 2px; border-bottom: 1px solid var(--line); }
.recap li span { color: var(--muted); }
.recap li b { font-weight: 600; }
.done .acts { flex-direction: column; gap: 4px; }
.done .note { color: var(--muted); font-size: .9rem; margin: 24px 0 0; }

@media (max-width: 640px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 56px 0 36px; }
  .hero h1 { font-size: 2.6rem; }
  .sub { font-size: 1.1rem; margin: 14px 0 26px; }
  .acts { flex-direction: column; gap: 6px; }
  .acts .b.solid { width: 100%; }
  .shot { padding: 6px; border-radius: 10px; }
  .subjects ul { gap: 8px 18px; font-size: .95rem; }
  footer .links { width: 100%; }
  footer .links a, footer .links button { margin: 0 18px 0 0; }
  .try { padding: 24px 20px 0; }
  .try h1 { font-size: 1.5rem; }
  .sheet { padding: 10px 10px 6px; border-radius: 8px; }
  .done h1 { font-size: 2rem; }
  .done .b { width: 100%; }
}