:root {
  --cobalt: #2a35f0; --cobalt-deep: #1b23b8; --hi: #ffe14d; --red: #f2495b; --green: #12a56b;
  --ink: #121437; --paper: #f2f4ff; --card: #ffffff; --line: #d9ddf5; --muted: #555a86;
  --ok: #0c7a4d; --ok-bg: #dcf5e9; --warn: #8a5600; --warn-bg: #fff0c2; --bad: #b3162b; --bad-bg: #ffe0e4; --off: #555a86; --off-bg: #e6e8f8;
  --v1: #aab4ff; --v2: #5a66ff; --v3: #2a35f0; --v4: #ffcf1f;
  --display: "Bricolage Grotesque", "Avenir Next", "Segoe UI", system-ui, sans-serif;
  --body: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #eef0ff; --paper: #0e1030; --card: #171a46; --line: #2a2e66; --muted: #a3a8d8;
    --ok: #6ee0aa; --ok-bg: #0f3a2a; --warn: #ffd36b; --warn-bg: #3e2e08; --bad: #ff9aa6; --bad-bg: #4a1420; --off: #a3a8d8; --off-bg: #232757;
    --v1: #4a54b8; --v2: #6f7bff; --v3: #a9b2ff;
  }
  :root:not([data-theme="light"]) .levels li:nth-child(3) .n { background: #3a46e0; }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 64px; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.6 var(--body); -webkit-font-smoothing: antialiased; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--hi); outline-offset: 3px; border-radius: 6px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: var(--cobalt); color: #fff; }
.bar-row { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.brand { font: 800 22px/1 var(--display); text-decoration: none; letter-spacing: -.02em; display: inline-flex; align-items: center; gap: 3px; }
.brand .three { background: var(--hi); color: var(--ink); border-radius: 7px; padding: 2px 7px 3px; transform: rotate(-4deg); }
.top nav a { color: #dfe2ff; text-decoration: none; font-weight: 500; font-size: 15px; margin-left: 18px; }
.top nav a:hover { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
@media (max-width: 520px) { .top nav a:nth-child(-n+1) { display: none; } .top nav a { margin-left: 12px; } }

/* hero */
.hero { background: var(--cobalt); color: #fff; padding: 46px 0 84px; position: relative; overflow: hidden; }
.hero::after { content: ""; position: absolute; left: -5%; right: -5%; bottom: -1px; height: 44px; background: var(--paper); clip-path: polygon(0 100%, 100% 0, 100% 100%); }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center; }
.hero h1 { font: 800 clamp(38px, 6.4vw, 66px)/1.02 var(--display); letter-spacing: -.035em; margin: 0 0 18px; text-wrap: balance; }
.lead { font-size: 19px; color: #dfe2ff; max-width: 30em; margin: 0 0 26px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
@media (max-width: 820px) { .hero-grid { grid-template-columns: 1fr; gap: 34px; } .hero { padding-bottom: 76px; } }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; font: 700 16px/1 var(--display); letter-spacing: -.01em; border: 0; border-radius: 999px; padding: 15px 24px; cursor: pointer; text-decoration: none; transition: transform .12s ease, box-shadow .12s ease; }
.btn-hi { background: var(--hi); color: #121437; box-shadow: 0 4px 0 #b39a00; }
.btn-hi:hover { transform: translateY(-2px); box-shadow: 0 6px 0 #b39a00; }
.btn-hi:active { transform: translateY(3px); box-shadow: 0 1px 0 #b39a00; }
.btn-line { background: transparent; color: #fff; box-shadow: inset 0 0 0 2px rgba(255,255,255,.55); }
.btn-line:hover { box-shadow: inset 0 0 0 2px #fff; }
.btn-main { background: var(--cobalt); color: #fff; box-shadow: 0 4px 0 var(--cobalt-deep); }
.btn-main:hover { transform: translateY(-2px); box-shadow: 0 6px 0 var(--cobalt-deep); }
.btn-main:active { transform: translateY(3px); box-shadow: 0 1px 0 var(--cobalt-deep); }
.btn:disabled { opacity: .6; cursor: default; transform: none; }
.chip { font: 500 14px/1 var(--body); background: var(--card); color: var(--ink); border: 2px solid var(--line); border-radius: 999px; padding: 9px 14px; cursor: pointer; transition: border-color .12s, background .12s; }
.chip:hover { border-color: var(--cobalt); }
.chip[aria-pressed="true"] { background: var(--hi); border-color: var(--hi); color: #121437; font-weight: 700; }

/* the marked-up sheet */
.sheet { margin: 0; background: #fffefb; color: #121437; border-radius: 8px; padding: 26px 24px 8px; transform: rotate(-1.6deg); box-shadow: 10px 10px 0 rgba(10, 14, 90, .45); }
.sentence { font: 500 clamp(21px, 3.2vw, 27px)/1.45 var(--display); margin: 0 0 14px; }
.sentence sup { font: 700 .55em var(--body); color: var(--cobalt); margin-left: 2px; }
.hl { background: linear-gradient(transparent 55%, var(--hi) 55%, var(--hi) 92%, transparent 92%) no-repeat; background-size: 100% 100%; color: inherit; padding: 0 2px; animation: sweep .9s .4s cubic-bezier(.3,.7,.2,1) both; }
.refline { font-size: 13.5px; color: #5a5f8a; margin: 0 0 16px; padding-top: 12px; border-top: 1px dashed #c9cde8; }
.marks { list-style: none; margin: 0; padding: 0 0 8px; display: grid; gap: 8px; }
.marks li { display: grid; grid-template-columns: 30px 1fr; gap: 10px; align-items: center; font-size: 15px; line-height: 1.3; animation: pop .45s both; }
.marks b { display: block; font: 700 15px/1.2 var(--display); }
.marks span span, .marks li > span:last-child { color: #3b4070; }
.marks li > span:last-child b { color: #121437; }
.m1 { animation-delay: 1.4s; } .m2 { animation-delay: 1.95s; } .m3 { animation-delay: 2.5s; }
.tick { width: 28px; height: 28px; border-radius: 50%; position: relative; flex: none; }
.tick.ok { background: var(--green); }
.tick.ok::after { content: ""; position: absolute; left: 9px; top: 5px; width: 7px; height: 13px; border: solid #fff; border-width: 0 3px 3px 0; transform: rotate(40deg); }
.tick.bad { background: var(--red); }
.tick.bad::before, .tick.bad::after { content: ""; position: absolute; left: 7px; top: 12px; width: 14px; height: 3px; background: #fff; border-radius: 2px; transform: rotate(45deg); }
.tick.bad::after { transform: rotate(-45deg); }
@keyframes sweep { from { background-size: 0% 100%; } to { background-size: 100% 100%; } }
@keyframes pop { from { opacity: 0; transform: translateX(-10px) scale(.96); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .hl, .marks li { animation: none; } .btn, .chip { transition: none; } .fill { transition: none !important; } html { scroll-behavior: auto; } }

/* the three levels */
.levels-sec { padding: 30px 0 8px; }
.levels { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: none; }
.levels li { position: relative; padding: 4px 26px 4px 0; }
.levels li + li { padding-left: 26px; border-left: 2px solid var(--line); }
.levels .n { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 12px; font: 800 22px/1 var(--display); color: #fff; margin-bottom: 10px; }
.levels li:nth-child(1) .n { background: #7a85ff; } .levels li:nth-child(2) .n { background: #4651ff; } .levels li:nth-child(3) .n { background: var(--cobalt-deep); }
.levels h3 { font: 800 21px/1.2 var(--display); letter-spacing: -.02em; margin: 0 0 6px; }
.levels p { margin: 0; color: var(--muted); font-size: 16px; }
@media (max-width: 700px) { .levels { grid-template-columns: 1fr; gap: 22px; } .levels li, .levels li + li { padding: 0; border: 0; } }

/* sections */
.block { padding: 56px 20px 24px; }
h2 { font: 800 clamp(28px, 4.6vw, 40px)/1.08 var(--display); letter-spacing: -.03em; margin: 0 0 10px; }
h3 { font: 800 19px/1.2 var(--display); letter-spacing: -.015em; margin: 26px 0 8px; }
.muted { color: var(--muted); }
.sr { position: absolute; left: -9999px; }
code { font: .88em var(--mono); background: var(--off-bg); padding: 2px 6px; border-radius: 6px; }
textarea { width: 100%; background: var(--card); color: var(--ink); border: 2px solid var(--line); border-radius: 18px; padding: 16px; font: 14px/1.6 var(--mono); resize: vertical; }
textarea:focus-visible { border-color: var(--cobalt); outline: none; box-shadow: 0 0 0 4px rgba(42, 53, 240, .18); }
.examples { display: flex; gap: 8px; flex-wrap: wrap; margin: 16px 0 12px; }
.row { display: flex; align-items: center; gap: 16px; margin: 18px 0; flex-wrap: wrap; }
.out { display: grid; gap: 14px; margin-top: 4px; }

/* result cards */
.card { background: var(--card); border: 2px solid var(--line); border-radius: 18px; padding: 16px 18px; position: relative; overflow: hidden; }
.card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 8px; background: var(--off); }
.card.ok::before { background: var(--green); } .card.warn::before { background: var(--v4); } .card.bad::before { background: var(--red); }
.card .verdict { font: 800 20px/1.2 var(--display); letter-spacing: -.02em; margin: 0 0 8px 6px; }
.card .ref, .card .claim, .card .lv, .card > p.muted { margin-left: 6px; }
.card .ref { font-size: 14px; margin-top: 0; margin-bottom: 6px; overflow-wrap: anywhere; color: var(--muted); }
.card .claim { font: 500 16px/1.4 var(--display); margin-top: 0; margin-bottom: 10px; }
.lv { display: grid; grid-template-columns: 124px 1fr; gap: 4px 12px; font-size: 15px; align-items: start; margin-top: 5px; margin-bottom: 5px; }
.lv .name { color: var(--muted); font-weight: 500; }
.pill { display: inline-block; border-radius: 999px; padding: 2px 10px; font: 700 13px/1.5 var(--display); margin-right: 4px; }
.pill.ok { background: var(--ok-bg); color: var(--ok); } .pill.warn { background: var(--warn-bg); color: var(--warn); } .pill.bad { background: var(--bad-bg); color: var(--bad); } .pill.off { background: var(--off-bg); color: var(--off); }
.note { background: var(--off-bg); border-radius: 14px; padding: 12px 14px; font-size: 15px; margin: 0; }

/* results */
.results-sec { background: linear-gradient(180deg, transparent, rgba(42, 53, 240, .07) 18%, rgba(42, 53, 240, .07) 82%, transparent); margin-top: 30px; }
.headline { font: 800 clamp(24px, 4.2vw, 36px)/1.15 var(--display); letter-spacing: -.03em; margin: 8px 0 26px; max-width: 24em; text-wrap: balance; }
.small { font-size: 14px; margin: 10px 0 18px; }
.vs-chart { display: grid; gap: 22px; max-width: 760px; }
.vs-label { font: 700 17px/1.2 var(--display); letter-spacing: -.01em; margin-bottom: 6px; }
.vs-label .hint { font: 400 14px var(--body); color: var(--muted); }
.bar .who { font-size: 14px; }
.more { margin-top: 10px; border-top: 2px solid var(--line); padding-top: 4px; }
.more > summary { cursor: pointer; font: 700 17px/1.2 var(--display); padding: 14px 0; list-style: none; display: flex; align-items: center; gap: 10px; }
.more > summary::-webkit-details-marker { display: none; }
.more > summary::before { content: "+"; display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 8px; background: var(--hi); color: #121437; font-weight: 800; }
.more[open] > summary::before { content: "-"; }
.more-wrap { padding-top: 10px; padding-bottom: 10px; }
.ledger { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 22px 0 34px; }
.stat { padding: 6px 22px 6px 0; }
.stat + .stat { padding-left: 22px; border-left: 2px solid var(--line); }
.stat .num { display: block; font: 800 clamp(32px, 5.4vw, 50px)/1 var(--display); letter-spacing: -.04em; color: var(--cobalt); margin-bottom: 8px; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .stat .num { color: var(--hi); } }
.stat .cap { display: block; font-size: 15px; line-height: 1.4; color: var(--muted); max-width: 17em; }
@media (max-width: 700px) { .ledger { grid-template-columns: 1fr; gap: 20px; } .stat, .stat + .stat { padding: 0; border: 0; } .stat .num { display: inline-block; margin-right: 10px; } }
.bars { display: grid; gap: 22px; }
.type h3 { margin: 0 0 8px; font-size: 18px; }
.type .hint { color: var(--muted); font: 400 14px var(--body); }
.bar { display: grid; grid-template-columns: 124px 1fr 106px; gap: 10px; align-items: center; font-size: 14px; margin: 5px 0; }
.track { background: var(--off-bg); border-radius: 999px; height: 14px; overflow: hidden; }
.fill { height: 100%; border-radius: 999px; width: 0; transition: width .9s cubic-bezier(.3,.7,.2,1); }
.fill.v1 { background: var(--v1); } .fill.v2 { background: var(--v2); } .fill.v3 { background: var(--v3); } .fill.v4 { background: var(--v4); }
.bar .val { text-align: right; font: 500 14px var(--body); font-variant-numeric: tabular-nums; }
@media (max-width: 560px) { .bar { grid-template-columns: 96px 1fr 92px; font-size: 13px; } .lv { grid-template-columns: 1fr; } }

table.plain { width: 100%; border-collapse: collapse; font-size: 16px; margin: 14px 0; }
table.plain th, table.plain td { text-align: left; border-bottom: 2px solid var(--line); padding: 10px 8px 10px 0; vertical-align: top; }
table.plain td:first-child { font: 700 15px var(--display); white-space: nowrap; padding-right: 18px; }
.foot { padding: 34px 0 48px; color: var(--muted); font-size: 15px; margin-top: 40px; border-top: 2px solid var(--line); }
.results-sec h2 { margin-bottom: 18px; }