/* BIG WORKS site styles. Tokens follow brand/design-system-tokens.css. */
:root {
  --bw-primary: #000; --bw-bg: #fff; --bw-surface: #F3F3F5; --bw-muted: #ECECF0;
  --bw-divider: rgba(0,0,0,0.10); --bw-fg: #000; --bw-fg2: #717182;
  --bw-yellow: #FFC20F; --bw-success: #0A8F18; --bw-success-bg: #E7F8E9;
  --bw-error: #D4183D; --bw-error-bg: #FCE8EC; --bw-warning: #E65100; --bw-warning-bg: #FFF3E0;
  --bw-radius: 14px; --bw-radius-sm: 8px; --bw-shadow: 0 2px 8px rgba(0,0,0,0.06);
  --bw-font: "Inter", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--bw-font); color: var(--bw-fg); background: var(--bw-surface); line-height: 1.55; font-size: 17px; }
a { color: inherit; }
h1 { font-size: clamp(28px, 6vw, 40px); font-weight: 900; letter-spacing: -0.5px; line-height: 1.15; margin: 8px 0 12px; }
h2 { font-size: 24px; font-weight: 800; letter-spacing: -0.3px; margin: 40px 0 12px; }
h3 { font-size: 18px; font-weight: 700; margin: 24px 0 6px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
main { padding-bottom: 48px; }

.top { background: var(--bw-primary); color: #fff; }
.top-row { display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 12px; }
.logo { font-weight: 900; font-size: 20px; letter-spacing: -0.5px; text-decoration: none; white-space: nowrap; }
.logo span { color: var(--bw-yellow); }
.nav { display: flex; gap: 16px; align-items: center; font-size: 15px; font-weight: 600; }
.nav a { text-decoration: none; opacity: .9; }
.nav a:hover { opacity: 1; }
.nav-cta { background: var(--bw-yellow); color: #000; padding: 6px 14px; border-radius: 999px; opacity: 1 !important; }
@media (max-width: 520px) { .nav a:not(.nav-cta):first-child { display: none; } .nav { gap: 12px; font-size: 14px; } }

.hero { background: var(--bw-primary); color: #fff; padding: 40px 0 48px; }
.kicker { color: var(--bw-yellow); font-weight: 700; text-transform: uppercase; letter-spacing: .06em; font-size: 13px; margin: 0; }
.lede { font-size: 19px; color: var(--bw-fg2); max-width: 640px; }
.hero .lede { color: #d0d0d8; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
.crumbs { font-size: 14px; color: var(--bw-fg2); margin: 24px 0 0; }

.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; padding: 0 24px; border-radius: 999px; font: 700 16px var(--bw-font); text-decoration: none; border: 2px solid transparent; cursor: pointer; }
.btn-yellow { background: var(--bw-yellow); color: #000; }
.btn-yellow:hover { filter: brightness(.95); }
.btn-dark { background: #000; color: #fff; }
.btn-ghost { border-color: currentColor; color: inherit; background: transparent; }
.btn-wide { width: 100%; }
.btn:disabled { opacity: .5; cursor: default; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.card { display: block; background: var(--bw-bg); border-radius: var(--bw-radius); padding: 20px; text-decoration: none; box-shadow: var(--bw-shadow); border: 1px solid var(--bw-divider); }
.card:hover { border-color: #000; }
.card h3 { margin: 0 0 6px; }
.card p { color: var(--bw-fg2); margin: 0 0 12px; font-size: 15px; }
.card-meta { font-weight: 700; font-size: 15px; }

.facts { width: 100%; border-collapse: collapse; background: var(--bw-bg); border-radius: var(--bw-radius); overflow: hidden; box-shadow: var(--bw-shadow); }
.facts th, .facts td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--bw-divider); vertical-align: top; }
.facts th { width: 34%; font-weight: 700; }
.facts tr:last-child th, .facts tr:last-child td { border-bottom: 0; }
@media (max-width: 520px) { .facts th, .facts td { display: block; width: auto; } .facts th { padding-bottom: 0; border: 0; } }
.plain { padding-left: 20px; }
.plain li { margin: 6px 0; }
.cite { font-size: 14px; color: var(--bw-fg2); overflow-wrap: anywhere; }

.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 20px 0; }
.tabs a { padding: 8px 16px; border-radius: 999px; background: var(--bw-muted); text-decoration: none; font-weight: 600; font-size: 15px; }
.tabs a[aria-current] { background: #000; color: #fff; }

.score { position: sticky; top: 0; z-index: 2; background: var(--bw-yellow); padding: 10px 16px; border-radius: var(--bw-radius-sm); margin-bottom: 12px; }
.q { background: var(--bw-bg); border: 1px solid var(--bw-divider); border-radius: var(--bw-radius); padding: 20px; margin: 0 0 16px; box-shadow: var(--bw-shadow); min-width: 0; }
.q legend { float: left; width: 100%; padding: 0; font-weight: 700; font-size: 18px; margin-bottom: 12px; }
.q-num { color: var(--bw-fg2); }
.choices { list-style: none; padding: 0; margin: 0; clear: both; }
.choices li { margin: 8px 0; }
.choices label { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 2px solid var(--bw-muted); border-radius: var(--bw-radius-sm); cursor: pointer; }
.choices label:hover { border-color: #bbb; }
.choices input { position: absolute; opacity: 0; pointer-events: none; }
.choices input:focus-visible + .letter { outline: 3px solid var(--bw-yellow); }
.letter { flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--bw-muted); display: grid; place-items: center; font-weight: 800; font-size: 14px; }
.choices label.is-correct { border-color: var(--bw-success); background: var(--bw-success-bg); }
.choices label.is-correct .letter { background: var(--bw-success); color: #fff; }
.choices label.is-wrong { border-color: var(--bw-error); background: var(--bw-error-bg); }
.choices label.is-wrong .letter { background: var(--bw-error); color: #fff; }
.choices label.is-picked { border-color: #000; }
.choices label.is-picked .letter { background: #000; color: #fff; }
.locked label { cursor: default; }
.explain { margin-top: 12px; }
.explain summary { cursor: pointer; font-weight: 700; color: var(--bw-fg2); }
.explain[open] summary { margin-bottom: 8px; }
.answer-line { margin-top: 0; }
.exam-note { background: var(--bw-warning-bg); border-left: 4px solid var(--bw-warning); padding: 10px 12px; border-radius: 4px; font-size: 15px; }
.verdict { font-weight: 800; margin: 12px 0 0; }
.verdict.ok { color: var(--bw-success); }
.verdict.bad { color: var(--bw-error); }

.buy { margin-top: 40px; background: #000; color: #fff; border-radius: var(--bw-radius); padding: 24px; display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; }
.buy h2 { margin: 0 0 6px; }
.buy p { margin: 0; color: #d0d0d8; max-width: 520px; }
.price-box { background: var(--bw-bg); border-radius: var(--bw-radius); padding: 24px; box-shadow: var(--bw-shadow); border: 2px solid #000; }
.price { font-size: 44px; font-weight: 900; margin: 0 0 8px; letter-spacing: -1px; }
.price span { font-size: 17px; font-weight: 600; color: var(--bw-fg2); letter-spacing: 0; }
.checks { list-style: none; padding: 0; margin: 0 0 20px; }
.checks li { padding: 6px 0 6px 30px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 0; top: 10px; width: 18px; height: 18px; border-radius: 50%; background: var(--bw-yellow) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4 8.5l2.5 2.5L12 5.5' fill='none' stroke='%23000' stroke-width='2'/%3E%3C/svg%3E") center/14px no-repeat; }
.field { display: block; width: 100%; min-height: 52px; margin: 8px 0 16px; padding: 0 14px; font: 17px var(--bw-font); border: 2px solid var(--bw-muted); border-radius: var(--bw-radius-sm); background: #fff; }
.field:focus { outline: none; border-color: #000; }
.or { text-align: center; color: var(--bw-fg2); font-weight: 600; margin: 4px 0 16px; }
.fine { font-size: 14px; color: var(--bw-fg2); margin-bottom: 0; }
.notice { background: var(--bw-warning-bg); border-left: 4px solid var(--bw-warning); padding: 12px 16px; border-radius: 4px; margin-top: 16px; }

/* Study app */
.panel { background: var(--bw-bg); border-radius: var(--bw-radius); padding: 20px; box-shadow: var(--bw-shadow); border: 1px solid var(--bw-divider); margin-bottom: 16px; }
.panel h2 { margin-top: 0; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.row .btn { min-height: 44px; padding: 0 18px; font-size: 15px; }
.sec-row { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--bw-divider); }
.sec-row:last-child { border-bottom: 0; }
.sec-row .row { grid-column: 1 / -1; }
.meter { height: 8px; background: var(--bw-muted); border-radius: 999px; overflow: hidden; margin-top: 6px; }
.meter > i { display: block; height: 100%; background: var(--bw-success); }
.muted { color: var(--bw-fg2); font-size: 15px; }
.bar { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 16px 0; font-weight: 600; }
.link-btn { background: none; border: 0; padding: 0; font: inherit; text-decoration: underline; cursor: pointer; color: inherit; }
.access-link { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; background: var(--bw-surface); padding: 10px; border-radius: var(--bw-radius-sm); overflow-wrap: anywhere; }
.result-big { font-size: 48px; font-weight: 900; margin: 0; }
.pass { color: var(--bw-success); }
.fail { color: var(--bw-error); }
.dots { display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0; }
.dots button { width: 34px; height: 34px; border-radius: 50%; border: 2px solid var(--bw-muted); background: #fff; font: 700 13px var(--bw-font); cursor: pointer; }
.dots button.done { background: #000; color: #fff; border-color: #000; }
.dots button.cur { border-color: var(--bw-yellow); }
.dots button.right { background: var(--bw-success); border-color: var(--bw-success); color: #fff; }
.dots button.wrong { background: var(--bw-error); border-color: var(--bw-error); color: #fff; }

.foot { border-top: 1px solid var(--bw-divider); padding: 24px 0; font-size: 14px; color: var(--bw-fg2); }
#app { padding-top: 24px; }