/* PassDrill — design tokens
   paper    #F6F7F4  cool exam-paper white
   ink      #182230  blue-black ballpoint ink
   scantron #0B7A75  teal of the classic answer-sheet grid (signature accent)
   pencil   #676B63  graphite, metadata only
   correct  #1E7A3C / wrong #B3372B — quiz feedback only */

:root {
  --paper: #F6F7F4; --ink: #182230; --scantron: #0B7A75;
  --pencil: #676B63; --correct: #1E7A3C; --wrong: #B3372B;
  --line: #D8DCD4;
  --display: "Space Grotesk", sans-serif;
  --mono: "IBM Plex Mono", monospace;
  --body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body); line-height: 1.6; font-size: 17px; }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }
a { color: var(--scantron); }
.mono, .qmeta, .src, .hero-count { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.02em; color: var(--pencil); }

/* Masthead with scantron alignment-mark strip */
.mast { border-bottom: 1px solid var(--line); background: #fff; }
.mast-in { display: flex; align-items: baseline; gap: 14px; padding: 16px 20px; flex-wrap: wrap; }
.brand { font-family: var(--display); font-weight: 700; font-size: 1.3rem; color: var(--ink); text-decoration: none; display: inline-flex; align-items: center; gap: 9px; }
.brand-mark { width: 14px; height: 14px; border-radius: 50%; border: 2.5px solid var(--scantron); background: radial-gradient(circle at center, var(--ink) 0 46%, transparent 48%); }
.tag { color: var(--pencil); font-size: 0.85rem; }
.scanstrip { height: 7px; background: repeating-linear-gradient(90deg, var(--scantron) 0 22px, transparent 22px 44px); opacity: 0.85; }

/* Type */
h1 { font-family: var(--display); font-weight: 700; font-size: clamp(1.7rem, 5vw, 2.5rem); line-height: 1.12; letter-spacing: -0.015em; margin: 1.4em 0 0.4em; }
.lede { font-size: 1.05rem; color: #3A4353; max-width: 56ch; }
.hero { padding-top: 8px; }
.crumbs { font-size: 0.82rem; color: var(--pencil); margin-top: 20px; }
.crumbs a { color: var(--pencil); }

/* Cards and grids */
.exam-grid, .topic-grid, .rel-list { list-style: none; padding: 0; display: grid; gap: 12px; margin: 26px 0; }
.exam-card, .topic-card { display: grid; gap: 4px; padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 10px; text-decoration: none; color: var(--ink); transition: border-color 0.15s; }
.exam-card:hover, .topic-card:hover { border-color: var(--scantron); }
.topic-card.soon { opacity: 0.5; }
.exam-card strong, .topic-card strong { font-family: var(--display); font-weight: 500; }

/* Question card = an exam paper item */
.qcard { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 22px; margin: 24px 0; }
.qmeta { margin: 0 0 10px; text-transform: uppercase; }
.qtext { font-family: var(--display); font-weight: 500; font-size: 1.15rem; line-height: 1.4; margin: 0 0 18px; }

/* Signature: scantron bubble options that pencil in on tap */
.opts { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; counter-reset: none; }
.opt { display: flex; gap: 14px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--line); border-radius: 8px; cursor: pointer; background: var(--paper); }
.opt:hover { border-color: var(--scantron); }
.bubble { flex: none; width: 30px; height: 30px; border-radius: 50%; border: 2px solid var(--scantron); display: grid; place-items: center; font-family: var(--mono); font-size: 0.8rem; font-weight: 500; color: var(--scantron); transition: background 0.18s, color 0.18s; margin-top: 1px; }
.opt.picked .bubble { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.opt.is-correct { border-color: var(--correct); background: #F0F7F1; }
.opt.is-correct .bubble { background: var(--correct); border-color: var(--correct); color: #fff; }
.opt.is-wrong { border-color: var(--wrong); background: #FBF1EF; }
.opt.is-wrong .bubble { background: var(--wrong); border-color: var(--wrong); color: #fff; }
.opts.locked .opt { cursor: default; }
.opt:focus-visible { outline: 3px solid var(--scantron); outline-offset: 2px; }

/* Reveal */
.reveal { border-top: 1px dashed var(--line); margin-top: 18px; padding-top: 14px; }
.verdict { font-family: var(--display); font-weight: 700; margin: 0 0 6px; }
.verdict.ok { color: var(--correct); } .verdict.no { color: var(--wrong); }
.explain { margin: 8px 0; }
.src { margin: 10px 0 0; }

.scoreboard { position: sticky; top: 0; z-index: 5; background: var(--ink); color: var(--paper); font-family: var(--mono); font-size: 0.85rem; padding: 9px 16px; border-radius: 0 0 10px 10px; }
.score-right { color: #7FD6A4; }

.btn { display: inline-block; background: var(--scantron); color: #fff; text-decoration: none; font-family: var(--display); font-weight: 500; padding: 11px 18px; border-radius: 8px; }
.related h3 { font-family: var(--display); margin-top: 36px; }
.rel-list li a { display: block; padding: 12px 14px; background: #fff; border: 1px solid var(--line); border-radius: 8px; text-decoration: none; color: var(--ink); font-size: 0.92rem; }

.foot { color: var(--pencil); font-size: 0.8rem; padding: 40px 20px 30px; border-top: 1px solid var(--line); margin-top: 50px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

.report-line { margin-top: 14px; }
.report-line a { color: var(--pencil); }