/* EOI-style exam section: hub, paper, runner, results and print.
   Visual language: a warm paper sheet with institutional rules, square
   answer boxes and a clear "simulacro no oficial" stamp. */

:root {
  --paper: #fffdf8;
  --paper-ink: #211c17;
  --paper-muted: #6d6154;
  --paper-line: #ddd0bb;
  --paper-line-strong: #c4b49a;
  --paper-tint: #f8f1e4;
  --paper-stamp: #8d1c27;
  --paper-green: #2f6f52;
  --paper-red: #a91f2b;
}

html[data-theme="dark"] {
  --paper: #211b17;
  --paper-ink: #f4ecdf;
  --paper-muted: #b7a897;
  --paper-line: #403329;
  --paper-line-strong: #574638;
  --paper-tint: #2a221c;
  --paper-stamp: #ef8c92;
  --paper-green: #8ac9a9;
  --paper-red: #f09095;
}

/* ======================================================================
   Hub
   ====================================================================== */
.exam-hub { max-width: 1120px; margin: 0 auto; padding: 0 28px 80px; }

.exam-hub-hero { max-width: 850px; padding: 56px 0 32px; }
.exam-hub-hero h1 { font-size: clamp(2.7rem, 5.8vw, 4.6rem); margin-top: 12px; letter-spacing: -.03em; }
.exam-hub-hero h1 em { color: var(--accent); font-weight: 500; }
.exam-hub-hero .lede { max-width: 68ch; margin-top: 18px; font-size: 1.03rem; }
.exam-warning {
  margin-top: 24px;
  padding: 13px 16px;
  border: 1px solid color-mix(in srgb, var(--accent) 32%, transparent);
  border-left: 4px solid var(--accent);
  border-radius: 0 10px 10px 0;
  background: var(--accent-soft);
  color: var(--ink-soft);
  font-size: .82rem;
  line-height: 1.55;
}
.exam-warning strong { color: var(--accent); }

.exam-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 34px;
}
.exam-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--surface) 88%, transparent), var(--surface)),
    var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.exam-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--line-strong);
}
.exam-card-official::before { background: var(--accent); }
.exam-card-top { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.exam-stamp {
  display: inline-flex;
  align-items: center;
  min-height: 23px;
  padding: 2px 9px;
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--accent);
  font-size: .58rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.exam-stamp.soft { border-color: var(--line-strong); color: var(--muted); }
.exam-level {
  font-family: var(--serif);
  font-size: 2.4rem;
  line-height: 1;
  color: var(--accent);
  letter-spacing: -.04em;
}
.exam-card h2 { margin-top: 20px; font-size: 1.75rem; }
.exam-card-sub { margin-top: 3px; font-family: var(--serif); font-style: italic; color: var(--muted); font-size: .93rem; }
.exam-card > p:not(.exam-card-sub):not(.exam-small) { margin-top: 12px; color: var(--ink-soft); font-size: .88rem; line-height: 1.6; }
.exam-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 22px 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--line);
}
.exam-facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 11px 12px;
  background: var(--surface-2);
  font-size: .65rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--muted);
}
.exam-facts strong { font-family: var(--serif); font-size: 1.2rem; line-height: 1.1; color: var(--ink); letter-spacing: 0; }
.exam-card .btn { margin-top: auto; }
.exam-small { margin-top: 10px; font-size: .7rem; color: var(--muted); line-height: 1.45; }

.exam-structure { margin-top: 62px; }
.exam-section-head { max-width: 720px; }
.exam-section-head h2 { margin-top: 6px; font-size: 1.7rem; }
.exam-skill-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 22px; }
.exam-skill {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.exam-skill-num { font-family: var(--serif); font-size: .9rem; color: var(--gold); }
.exam-skill h3 { margin-top: 6px; font-size: 1.18rem; }
.exam-skill p { margin-top: 5px; font-size: .8rem; color: var(--muted); line-height: 1.55; }
.exam-skill p + p { color: var(--ink-soft); }

.exam-rules { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: 38px; margin-top: 52px; padding: 34px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.exam-rules h2 { margin-top: 6px; font-size: 1.65rem; }
.exam-rules-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 24px; }
.exam-rules-grid strong { display: block; font-family: var(--serif); font-size: 1rem; }
.exam-rules-grid p { margin-top: 4px; font-size: .78rem; color: var(--muted); line-height: 1.55; }

.exam-history { margin-top: 46px; }
.history-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 14px; }
.history-head h2 { font-size: 1.4rem; }
.history-head p { margin-top: 3px; font-size: .78rem; color: var(--muted); }
.history-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.history-card { padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.history-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.history-level { font-family: var(--serif); font-size: 1.25rem; font-weight: 600; }
.history-badge { padding: 1px 7px; border-radius: 4px; font-size: .58rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.history-badge.pass { background: var(--green-soft); color: var(--green); }
.history-badge.fail { background: var(--accent-soft); color: var(--accent); }
.history-badge.none { background: var(--surface-2); color: var(--muted); }
.history-main { display: flex; align-items: baseline; gap: 8px; margin-top: 12px; }
.history-main strong { font-family: var(--serif); font-size: 1.9rem; line-height: 1; }
.history-main span { font-size: .72rem; color: var(--muted); }
.history-meta { margin-top: 8px; font-size: .72rem; color: var(--muted); line-height: 1.5; }
.history-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
.history-actions .btn { min-height: 32px; padding: 5px 12px; font-size: .74rem; }
.history-empty { padding: 20px; border: 1px dashed var(--line-strong); border-radius: var(--radius); background: var(--surface-2); color: var(--muted); font-size: .82rem; }
.history-clear { border: 0; background: transparent; color: var(--muted); font-size: .7rem; text-decoration: underline; text-underline-offset: 2px; }
.history-clear:hover { color: var(--accent); }

/* ======================================================================
   Runner shell
   ====================================================================== */
.exam-runner { max-width: 960px; margin: 0 auto; padding: 24px 22px 90px; }
.exam-paper {
  position: relative;
  border: 1px solid var(--paper-line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--paper-ink);
  box-shadow: var(--shadow-lg);
}
body[data-page="exam"] .exam-paper a { color: var(--paper-stamp); }

.paper-header {
  position: relative;
  padding: 26px 40px 22px;
  border-bottom: 3px double var(--paper-line-strong);
  text-align: center;
}
.paper-org {
  font-size: .59rem;
  font-weight: 750;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--paper-muted);
}
.paper-title {
  margin-top: 9px;
  font-family: var(--serif);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1.2;
}
.paper-sub { margin-top: 4px; font-size: .78rem; color: var(--paper-muted); }
.paper-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px 18px;
  margin-top: 13px;
  font-size: .6rem;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--paper-muted);
}
.paper-meta strong { color: var(--paper-ink); font-weight: 750; }
.paper-stamp {
  position: absolute;
  top: 18px;
  right: 22px;
  padding: 4px 9px;
  border: 1.5px solid var(--paper-stamp);
  border-radius: 3px;
  color: var(--paper-stamp);
  font-size: .52rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  line-height: 1.35;
  text-align: center;
  transform: rotate(-3deg);
  opacity: .9;
}
.paper-stamp span { display: block; font-size: .44rem; letter-spacing: .1em; opacity: .8; }

.paper-body { padding: 34px 40px 38px; }
.paper-foot {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 40px 16px;
  border-top: 1px solid var(--paper-line);
  color: var(--paper-muted);
  font-size: .58rem;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* cover */
.exam-cover .paper-body { padding-top: 38px; }
.cover-eyebrow { font-size: .62rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; color: var(--paper-stamp); }
.cover-title { margin-top: 10px; font-family: var(--serif); font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.05; letter-spacing: -.03em; }
.cover-title em { color: var(--paper-stamp); font-weight: 500; }
.cover-level { margin-top: 10px; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--paper-muted); }
.cover-lede { max-width: 66ch; margin-top: 18px; font-size: .92rem; line-height: 1.65; color: var(--paper-muted); }
.cover-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); gap: 26px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--paper-line); }
.cover-block h2 { font-family: var(--sans); font-size: .65rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--paper-muted); }
.cover-block p, .cover-block li { font-size: .82rem; line-height: 1.6; color: var(--paper-ink); }
.cover-block p { margin-top: 8px; }
.cover-block ol { margin: 8px 0 0; padding-left: 19px; }
.cover-block li + li { margin-top: 4px; }
.cover-sections { margin: 9px 0 0; padding: 0; list-style: none; border: 1px solid var(--paper-line); }
.cover-sections li { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 7px 10px; font-size: .78rem; }
.cover-sections li + li { border-top: 1px solid var(--paper-line); }
.cover-sections span { color: var(--paper-muted); font-size: .68rem; white-space: nowrap; }
.cover-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 28px; }
.cover-fine { margin-top: 16px; padding: 11px 13px; border-left: 3px solid var(--paper-stamp); background: var(--paper-tint); font-size: .7rem; line-height: 1.55; color: var(--paper-muted); }
.cover-fine strong { color: var(--paper-ink); }
.cover-status { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; font-size: .72rem; color: var(--paper-muted); }
.cover-status .btn { min-height: 30px; padding: 4px 11px; font-size: .7rem; }

/* section intro */
.exam-intro .paper-body { padding-top: 42px; }
.intro-number { font-family: var(--serif); font-size: 3.8rem; line-height: .9; color: var(--paper-stamp); letter-spacing: -.05em; }
.intro-kicker { margin-top: 16px; font-size: .62rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--paper-muted); }
.intro-title { margin-top: 4px; font-family: var(--serif); font-size: clamp(2rem, 4.6vw, 2.9rem); line-height: 1.05; letter-spacing: -.025em; }
.intro-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 12px; font-size: .68rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--paper-muted); }
.intro-meta strong { color: var(--paper-ink); }
.intro-lede { max-width: 68ch; margin-top: 18px; font-size: .92rem; line-height: 1.65; color: var(--paper-muted); }
.intro-tasks { margin: 24px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--paper-line); }
.intro-tasks li { display: flex; justify-content: space-between; gap: 14px; padding: 9px 0; border-bottom: 1px solid var(--paper-line); font-size: .8rem; }
.intro-tasks span { color: var(--paper-muted); font-size: .7rem; white-space: nowrap; }
.intro-note { max-width: 66ch; margin-top: 20px; padding: 13px 15px; border: 1px dashed var(--paper-line-strong); background: var(--paper-tint); font-size: .78rem; line-height: 1.6; color: var(--paper-muted); }
.intro-note strong { color: var(--paper-ink); }

/* timer bar */
.exam-timerbar {
  position: sticky;
  top: 66px;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 12px 18px;
  flex-wrap: wrap;
  padding: 9px 14px;
  margin: 0 0 12px;
  border: 1px solid var(--paper-line);
  border-radius: 3px;
  background: color-mix(in srgb, var(--paper) 94%, transparent);
  color: var(--paper-ink);
  box-shadow: 0 10px 24px -22px rgba(30, 20, 10, .7);
  backdrop-filter: blur(10px);
}
.timer-section { display: flex; align-items: center; gap: 9px; min-width: 0; }
.timer-dots { display: flex; gap: 4px; }
.timer-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--paper-line-strong); }
.timer-dot.done { background: var(--paper-green); }
.timer-dot.now { background: var(--paper-stamp); box-shadow: 0 0 0 3px color-mix(in srgb, var(--paper-stamp) 16%, transparent); }
.timer-label { font-size: .66rem; font-weight: 750; letter-spacing: .1em; text-transform: uppercase; color: var(--paper-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.timer-clock {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 11px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: .92rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
  white-space: nowrap;
}
.timer-clock.warn { border-color: var(--paper-stamp); color: var(--paper-stamp); }
.timer-clock.done { border-color: var(--paper-red); color: var(--paper-red); }
.timer-actions { display: flex; align-items: center; gap: 6px; }
.timer-actions button {
  min-height: 28px;
  padding: 3px 10px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--paper-muted);
  font-size: .66rem;
  font-weight: 650;
}
.timer-actions button:hover { border-color: var(--paper-stamp); color: var(--paper-stamp); }

/* section paper head */
.section-paper-head { padding: 23px 40px 18px; border-bottom: 1px solid var(--paper-line); }
.section-paper-head .paper-org { text-align: left; }
.section-paper-head h1 { margin-top: 6px; font-family: var(--serif); font-size: 1.55rem; line-height: 1.1; }
.section-paper-head .paper-meta { justify-content: flex-start; margin-top: 7px; }

/* ======================================================================
   Tasks
   ====================================================================== */
.exam-task + .exam-task { margin-top: 40px; padding-top: 30px; border-top: 2px solid var(--paper-line); }
.task-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.task-label { font-size: .62rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--paper-stamp); }
.task-name { margin-top: 3px; font-family: var(--serif); font-size: 1.32rem; line-height: 1.15; }
.task-points { flex: none; padding: 2px 8px; border: 1px solid var(--paper-line-strong); border-radius: 2px; font-size: .62rem; font-weight: 750; letter-spacing: .07em; text-transform: uppercase; color: var(--paper-muted); white-space: nowrap; }
.task-instructions { max-width: 74ch; margin-top: 9px; font-size: .82rem; line-height: 1.55; color: var(--paper-muted); }
.task-body { margin-top: 20px; }

.reading-title { margin: 6px 0 12px; font-family: var(--sans); font-size: .78rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; text-align: center; }
.reading-text { max-width: 72ch; font-family: var(--serif); font-size: 1rem; line-height: 1.72; }
.reading-text p + p { margin-top: 10px; }

/* multiple choice */
.mcq-list { display: flex; flex-direction: column; gap: 20px; margin-top: 24px; }
.mcq-item { display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 9px; }
.mcq-num { font-family: var(--serif); font-size: 1.02rem; color: var(--paper-muted); padding-top: 1px; }
.mcq-question { font-size: .92rem; font-weight: 600; line-height: 1.5; }
.mcq-options { display: flex; flex-direction: column; gap: 3px; margin-top: 9px; }
.mcq-option {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 7px 10px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: .87rem;
  line-height: 1.45;
  cursor: pointer;
  transition: background .2s cubic-bezier(.4, 0, .2, 1), border-color .2s cubic-bezier(.4, 0, .2, 1);
}
.mcq-option:hover { background: var(--paper-tint); }
.mcq-option input { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.mcq-letter {
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  flex: none;
  border: 1px solid var(--paper-line-strong);
  border-radius: 2px;
  background: var(--paper);
  font-family: var(--mono);
  font-size: .67rem;
  font-weight: 700;
  color: var(--paper-muted);
  transition: background .12s, color .12s, border-color .12s;
}
.mcq-option input:checked + .mcq-letter { background: var(--paper-ink); border-color: var(--paper-ink); color: var(--paper); }
.mcq-option:has(input:checked) { border-color: var(--paper-line-strong); background: var(--paper-tint); }
.mcq-option input:focus-visible + .mcq-letter { outline: 2px solid var(--paper-stamp); outline-offset: 2px; }

.example-box { margin-top: 20px; padding: 13px 15px; border: 1px dashed var(--paper-line-strong); background: var(--paper-tint); }
.example-label { font-size: .58rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--paper-stamp); }
.example-box .mcq-question { margin-top: 7px; font-size: .86rem; }
.example-box .mcq-option { cursor: default; }
.example-box .mcq-option.correct { border-color: var(--paper-line-strong); background: var(--paper); }
.example-box .mcq-option.correct .mcq-letter { background: var(--paper-green); border-color: var(--paper-green); color: #fff; }
.example-answer { margin-top: 7px; font-size: .78rem; line-height: 1.5; color: var(--paper-muted); }
.example-answer strong { color: var(--paper-ink); }

/* gap fill */
.gap-text { max-width: 72ch; font-size: .98rem; line-height: 2.25; }
.gap-input {
  display: inline-block;
  min-width: 80px;
  max-width: 190px;
  height: 1.7em;
  margin: 0 2px;
  padding: 0 4px;
  border: 0;
  border-bottom: 2px solid var(--paper-ink);
  border-radius: 0;
  background: transparent;
  color: var(--paper-ink);
  font-family: inherit;
  font-size: inherit;
  font-weight: 650;
  line-height: 1.3;
  text-align: center;
  vertical-align: baseline;
  outline: none;
}
.gap-input:focus { border-bottom-color: var(--paper-stamp); background: var(--paper-tint); }
.gap-n { margin-left: 3px; font-family: var(--mono); font-size: .58rem; font-weight: 700; color: var(--paper-stamp); vertical-align: super; }
.gap-input::placeholder { color: var(--paper-muted); font-weight: 400; opacity: .5; }
.wordbank { display: flex; flex-wrap: wrap; gap: 6px; margin: 16px 0 20px; padding: 13px 14px; border: 1px solid var(--paper-line-strong); background: var(--paper-tint); }
.wordbank span { padding: 3px 11px; border: 1px solid var(--paper-line); border-radius: 2px; background: var(--paper); font-size: .88rem; }

/* matching */
.match-layout { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr); gap: 20px; align-items: start; }
.match-list { border-top: 1px solid var(--paper-line); }
.match-item { display: grid; grid-template-columns: 24px minmax(0, 1fr) 62px; gap: 9px; align-items: start; padding: 11px 0; border-bottom: 1px solid var(--paper-line); }
.match-item.example { opacity: .85; }
.match-num { font-family: var(--serif); font-size: .98rem; color: var(--paper-muted); padding-top: 1px; }
.match-text { font-size: .84rem; line-height: 1.55; }
.match-select {
  width: 62px;
  height: 34px;
  padding: 0 5px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 2px;
  background: var(--paper);
  color: var(--paper-ink);
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 700;
  text-align: center;
  text-align-last: center;
  outline: none;
}
.match-select:focus { border-color: var(--paper-stamp); }
.match-select:disabled { opacity: 1; color: var(--paper-muted); background: var(--paper-tint); }
.match-titles { padding: 12px 14px; border: 1px solid var(--paper-line-strong); background: var(--paper-tint); }
.match-titles h3 { font-family: var(--sans); font-size: .58rem; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; color: var(--paper-muted); }
.match-title { display: flex; gap: 8px; padding: 6px 0; font-size: .78rem; line-height: 1.4; }
.match-title + .match-title { border-top: 1px dotted var(--paper-line); }
.match-title b { color: var(--paper-stamp); font-family: var(--mono); font-size: .74rem; }
.match-audio { display: flex; align-items: center; gap: 7px; margin-top: 6px; }

/* audio */
.audio-panel { display: flex; align-items: center; gap: 10px 16px; flex-wrap: wrap; margin: 20px 0 6px; padding: 15px 17px; border: 1px solid var(--paper-line-strong); background: var(--paper-tint); }
.audio-play {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 18px;
  border: 1px solid var(--paper-stamp);
  border-radius: 999px;
  background: var(--paper-stamp);
  color: #fff;
  font-size: .82rem;
  font-weight: 750;
  line-height: 1;
  transition: transform .15s, opacity .15s;
}
html[data-theme="dark"] .audio-play { color: #1d1113; }
.audio-play:hover:not(:disabled) { transform: translateY(-1px); }
.audio-play:disabled { opacity: .45; cursor: not-allowed; }
.audio-play.playing { animation: exam-pulse 1.6s cubic-bezier(.4, 0, .2, 1) infinite; }
@keyframes exam-pulse { 0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--paper-stamp) 0%, transparent); } 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--paper-stamp) 14%, transparent); } }
.audio-meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.audio-meta strong { font-size: .78rem; }
.audio-meta span { font-size: .68rem; color: var(--paper-muted); }
.audio-wave { display: flex; align-items: center; gap: 2px; height: 22px; margin-left: auto; }
.audio-wave i { width: 3px; border-radius: 1px; background: var(--paper-line-strong); height: 35%; }
.audio-wave i:nth-child(2) { height: 70%; }
.audio-wave i:nth-child(3) { height: 100%; }
.audio-wave i:nth-child(4) { height: 50%; }
.audio-wave i:nth-child(5) { height: 82%; }
.audio-wave i:nth-child(6) { height: 40%; }
.audio-wave i:nth-child(7) { height: 65%; }
.audio-play.playing ~ .audio-wave i { background: var(--paper-stamp); animation: exam-wave 1.2s cubic-bezier(.4, 0, .2, 1) infinite; }
.audio-play.playing ~ .audio-wave i:nth-child(2n) { animation-delay: .15s; }
@keyframes exam-wave { 0%, 100% { transform: scaleY(1); } 50% { transform: scaleY(.4); } }
.audio-mini {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 27px;
  padding: 2px 8px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 999px;
  background: var(--paper);
  color: var(--paper-stamp);
  font-size: .63rem;
  font-weight: 700;
  white-space: nowrap;
}
.audio-mini:hover:not(:disabled) { border-color: var(--paper-stamp); }
.audio-mini:disabled { opacity: .45; cursor: not-allowed; }
.audio-mini.playing { background: var(--paper-stamp); border-color: var(--paper-stamp); color: #fff; }
.audio-mini small { color: var(--paper-muted); font-weight: 550; }
.audio-mini.playing small { color: inherit; opacity: .8; }

/* writing and speaking */
.writing-prompt, .speaking-prompt { padding: 17px 18px; border: 1px solid var(--paper-line-strong); background: var(--paper-tint); }
.prompt-kicker { font-size: .58rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--paper-stamp); }
.prompt-title { margin-top: 5px; font-family: var(--serif); font-size: 1.28rem; line-height: 1.2; }
.prompt-bullets { margin: 9px 0 0; padding-left: 20px; font-size: .84rem; line-height: 1.6; }
.prompt-bullets li + li { margin-top: 2px; }
.prompt-words { margin-top: 9px; font-size: .7rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--paper-muted); }

.writing-area {
  width: 100%;
  min-height: 230px;
  margin-top: 16px;
  padding: 8px 12px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 2px;
  background-color: var(--paper);
  background-image: repeating-linear-gradient(to bottom, transparent 0, transparent 31px, var(--paper-line) 31px, var(--paper-line) 32px);
  color: var(--paper-ink);
  font-family: var(--sans);
  font-size: .93rem;
  line-height: 32px;
  resize: vertical;
  outline: none;
}
.writing-area:focus { border-color: var(--paper-stamp); }
.writing-meta { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-top: 7px; font-size: .7rem; color: var(--paper-muted); }
.word-count { font-variant-numeric: tabular-nums; }
.word-count.ok { color: var(--paper-green); font-weight: 700; }
.word-count.over { color: var(--paper-red); font-weight: 700; }

.speaking-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr); gap: 18px; margin-top: 16px; }
.speak-clock-box { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 9px; padding: 20px; border: 1px solid var(--paper-line); background: var(--paper-tint); text-align: center; }
.speak-label { font-size: .58rem; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; color: var(--paper-muted); }
.speak-clock { font-family: var(--mono); font-size: 2rem; font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1; }
.speak-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.speak-actions button { min-height: 30px; padding: 3px 11px; border: 1px solid var(--paper-line-strong); border-radius: 999px; background: var(--paper); font-size: .68rem; font-weight: 650; }
.speak-actions button:hover { border-color: var(--paper-stamp); color: var(--paper-stamp); }
.speak-model { margin-top: 10px; font-size: .78rem; color: var(--paper-muted); line-height: 1.55; }

/* self score */
.selfscore { margin-top: 20px; padding: 14px 16px; border: 1px solid var(--paper-line-strong); background: var(--paper-tint); }
.selfscore-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.selfscore-head strong { font-size: .78rem; }
.selfscore-head span { font-size: .66rem; color: var(--paper-muted); }
.score-chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 10px; }
.score-chip {
  display: grid;
  place-items: center;
  min-width: 31px;
  height: 31px;
  padding: 0 5px;
  border: 1px solid var(--paper-line-strong);
  border-radius: 2px;
  background: var(--paper);
  color: var(--paper-muted);
  font-size: .72rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.score-chip:hover { border-color: var(--paper-stamp); color: var(--paper-stamp); }
.score-chip[aria-pressed="true"] { background: var(--paper-ink); border-color: var(--paper-ink); color: var(--paper); }
.score-note { margin-top: 7px; font-size: .66rem; color: var(--paper-muted); }
.rubric-box { margin-top: 13px; padding: 11px 13px; border-left: 3px solid var(--paper-line-strong); background: var(--paper); font-size: .76rem; line-height: 1.55; color: var(--paper-muted); }
.rubric-box strong { color: var(--paper-ink); }
.model-box { margin-top: 12px; }
.model-box summary { cursor: pointer; font-size: .74rem; font-weight: 700; color: var(--paper-stamp); }
.model-text { margin-top: 8px; padding-left: 11px; border-left: 2px solid var(--paper-line-strong); white-space: pre-wrap; font-size: .8rem; line-height: 1.65; color: var(--paper-ink); }

/* ======================================================================
   Section footer and confirmation
   ====================================================================== */
.exam-footnav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px 20px;
  flex-wrap: wrap;
  padding: 17px 40px;
  border-top: 2px solid var(--paper-line);
  background: var(--paper-tint);
}
.exam-answered { font-size: .72rem; color: var(--paper-muted); font-variant-numeric: tabular-nums; }
.exam-answered strong { color: var(--paper-ink); }
.exam-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 8px 20px;
  border: 1px solid var(--paper-stamp);
  border-radius: 999px;
  background: var(--paper-stamp);
  color: #fff;
  font-size: .82rem;
  font-weight: 750;
}
html[data-theme="dark"] .exam-submit { color: #1d1113; }
.exam-submit:hover { filter: brightness(1.06); }
.exam-submit.ghost { background: transparent; color: var(--paper-stamp); }

.exam-confirm {
  margin: 0 40px 24px;
  padding: 16px 18px;
  border: 1px solid var(--paper-stamp);
  border-left-width: 4px;
  background: var(--paper-tint);
}
.exam-confirm h3 { font-family: var(--serif); font-size: 1.1rem; }
.exam-confirm p { margin-top: 5px; font-size: .78rem; line-height: 1.55; color: var(--paper-muted); }
.exam-confirm-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.exam-confirm .btn { min-height: 34px; padding: 5px 14px; font-size: .74rem; }
.exam-confirm .btn.primary { background: var(--paper-stamp); border-color: var(--paper-stamp); color: #fff; }
html[data-theme="dark"] .exam-confirm .btn.primary { color: #1d1113; }

/* ======================================================================
   Results
   ====================================================================== */
.result-hero { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 22px; align-items: center; padding-bottom: 24px; border-bottom: 2px solid var(--paper-line); }
.result-kicker { font-size: .62rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; color: var(--paper-stamp); }
.result-title { margin-top: 5px; font-family: var(--serif); font-size: clamp(1.8rem, 4.5vw, 2.7rem); line-height: 1.05; letter-spacing: -.02em; }
.result-score { display: flex; align-items: baseline; gap: 6px; margin-top: 10px; }
.result-score strong { font-family: var(--serif); font-size: clamp(2.8rem, 7vw, 4.4rem); line-height: .95; letter-spacing: -.04em; }
.result-score span { font-size: .85rem; color: var(--paper-muted); }
.result-verdict {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  padding: 12px 16px;
  border: 2px solid var(--paper-line-strong);
  border-radius: 3px;
  font-size: .78rem;
  font-weight: 850;
  letter-spacing: .13em;
  text-transform: uppercase;
  text-align: center;
  transform: rotate(-2deg);
}
.result-verdict.pass { border-color: var(--paper-green); color: var(--paper-green); }
.result-verdict.fail { border-color: var(--paper-red); color: var(--paper-red); }
.result-criteria { margin-top: 10px; font-size: .75rem; color: var(--paper-muted); line-height: 1.55; }
.result-criteria strong { color: var(--paper-ink); }

.result-sections { margin-top: 24px; }
.result-row { display: grid; grid-template-columns: minmax(0, 1fr) 150px 74px; gap: 12px; align-items: center; padding: 11px 0; border-bottom: 1px solid var(--paper-line); }
.result-row:first-child { border-top: 1px solid var(--paper-line); }
.result-name { display: flex; flex-direction: column; gap: 1px; }
.result-name strong { font-size: .84rem; }
.result-name span { font-size: .64rem; color: var(--paper-muted); }
.result-bar { height: 8px; border-radius: 999px; background: var(--paper-line); overflow: hidden; }
.result-bar i { display: block; height: 100%; border-radius: inherit; background: var(--paper-green); }
.result-bar i.low { background: var(--paper-red); }
.result-points { text-align: right; font-family: var(--mono); font-size: .78rem; font-variant-numeric: tabular-nums; white-space: nowrap; }
.result-points small { color: var(--paper-muted); font-family: var(--sans); }
.result-note { margin-top: 16px; padding: 11px 13px; border-left: 3px solid var(--paper-stamp); background: var(--paper-tint); font-size: .73rem; line-height: 1.55; color: var(--paper-muted); }
.result-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
.result-actions .btn { min-height: 38px; }
.result-actions .btn.primary { background: var(--paper-stamp); border-color: var(--paper-stamp); color: #fff; }
html[data-theme="dark"] .result-actions .btn.primary { color: #1d1113; }

/* review */
.exam-review { margin-top: 30px; }
.exam-review > h2 { font-family: var(--serif); font-size: 1.5rem; }
.review-intro { margin-top: 5px; font-size: .76rem; color: var(--paper-muted); }
.review-section { margin-top: 18px; border: 1px solid var(--paper-line); }
.review-section > summary { display: flex; align-items: center; gap: 10px; padding: 12px 14px; background: var(--paper-tint); cursor: pointer; font-size: .78rem; font-weight: 750; list-style: none; }
.review-section > summary::-webkit-details-marker { display: none; }
.review-section > summary::before { content: "▸"; color: var(--paper-stamp); }
.review-section[open] > summary::before { content: "▾"; }
.review-section > summary span { margin-left: auto; font-size: .68rem; color: var(--paper-muted); font-weight: 500; }
.review-body { padding: 4px 14px 14px; }
.review-task { padding: 14px 0; border-bottom: 1px solid var(--paper-line); }
.review-task:last-child { border-bottom: 0; }
.review-task h3 { font-family: var(--sans); font-size: .68rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--paper-muted); }
.review-q { padding: 9px 0; border-bottom: 1px dotted var(--paper-line); font-size: .8rem; line-height: 1.55; }
.review-q:last-child { border-bottom: 0; }
.review-q > strong { display: block; font-weight: 600; }
.review-ans { margin-top: 4px; font-size: .75rem; }
.review-ans span { display: inline-block; margin-right: 12px; }
.review-ans .ok { color: var(--paper-green); }
.review-ans .bad { color: var(--paper-red); }
.review-ans .blank { color: var(--paper-muted); font-style: italic; }
.review-explain { margin-top: 4px; font-size: .71rem; color: var(--paper-muted); }
.review-gap-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 4px 16px; margin-top: 8px; font-size: .75rem; }
.review-gap { display: flex; gap: 6px; align-items: baseline; }
.review-gap b { color: var(--paper-muted); font-family: var(--mono); font-size: .68rem; }
.review-model { margin-top: 8px; font-size: .76rem; line-height: 1.6; white-space: pre-wrap; padding-left: 10px; border-left: 2px solid var(--paper-line-strong); color: var(--paper-muted); }
.review-self { margin-top: 6px; font-size: .72rem; color: var(--paper-muted); }

/* ======================================================================
   History / hub extras
   ====================================================================== */
.exam-history .history-card { background: var(--surface); }
.history-continue { display: inline-flex; align-items: center; gap: 5px; font-size: .72rem; color: var(--accent); text-decoration: none; font-weight: 650; }
.history-continue:hover { text-decoration: underline; }

/* ======================================================================
   Responsive
   ====================================================================== */
@media (max-width: 900px) {
  .exam-hub { padding-left: 18px; padding-right: 18px; }
  .exam-cards, .exam-skill-grid, .history-grid { grid-template-columns: 1fr; }
  .exam-rules { grid-template-columns: 1fr; gap: 20px; }
  .exam-rules-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .exam-runner { padding-left: 14px; padding-right: 14px; }
  .paper-header, .section-paper-head, .paper-body { padding-left: 24px; padding-right: 24px; }
  .paper-foot, .exam-footnav { padding-left: 24px; padding-right: 24px; }
  .exam-confirm { margin-left: 24px; margin-right: 24px; }
  .cover-grid, .match-layout, .speaking-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .exam-hub-hero { padding-top: 38px; }
  .exam-hub-hero h1 { font-size: clamp(2.3rem, 11vw, 3.3rem); }
  .exam-card { padding: 22px; }
  .exam-rules-grid { grid-template-columns: 1fr; gap: 14px; }
  .paper-header { padding: 22px 18px 18px; }
  .paper-stamp { position: static; display: inline-block; margin-bottom: 12px; transform: none; }
  .paper-body, .section-paper-head { padding-left: 18px; padding-right: 18px; }
  .paper-foot, .exam-footnav { padding-left: 18px; padding-right: 18px; }
  .exam-confirm { margin-left: 18px; margin-right: 18px; }
  .paper-meta { gap: 4px 12px; font-size: .55rem; }
  .task-head { flex-direction: column; gap: 5px; }
  .task-points { align-self: flex-start; }
  .mcq-item { grid-template-columns: 1fr; gap: 2px; }
  .mcq-num { font-size: .82rem; }
  .match-item { grid-template-columns: 20px minmax(0, 1fr) 54px; gap: 6px; }
  .match-select { width: 54px; height: 32px; }
  .timer-label { display: none; }
  .exam-timerbar { top: 66px; gap: 8px; padding: 7px 10px; }
  .timer-clock { font-size: .84rem; padding: 2px 9px; }
  .timer-actions button { padding: 2px 8px; font-size: .6rem; }
  .result-hero { grid-template-columns: 1fr; }
  .result-verdict { justify-self: start; }
  .result-row { grid-template-columns: minmax(0, 1fr) 80px; gap: 6px 10px; }
  .result-bar { grid-column: 1 / -1; grid-row: 2; }
  .result-points { grid-column: 2; grid-row: 1; }
  .cover-actions .btn { flex: 1 1 auto; }
  .audio-wave { display: none; }
  .writing-area { min-height: 200px; }
}
@media (max-width: 420px) {
  .exam-facts { grid-template-columns: 1fr; }
  .exam-facts li { flex-direction: row; align-items: baseline; gap: 6px; }
  .exam-facts strong { font-size: 1rem; }
  .score-chip { min-width: 28px; height: 28px; font-size: .66rem; }
}

/* ======================================================================
   Print
   ====================================================================== */
@media print {
  :root {
    --paper: #fff;
    --paper-ink: #111;
    --paper-muted: #444;
    --paper-line: #bbb;
    --paper-line-strong: #888;
    --paper-tint: #f5f5f5;
    --paper-stamp: #111;
    --paper-green: #111;
    --paper-red: #111;
  }
  html[data-theme="dark"] {
    --paper: #fff;
    --paper-ink: #111;
    --paper-muted: #444;
    --paper-line: #bbb;
    --paper-line-strong: #888;
    --paper-tint: #f5f5f5;
    --paper-stamp: #111;
    --paper-green: #111;
    --paper-red: #111;
  }
  html, body { background: #fff !important; }
  body { font-size: 11pt; }
  .topbar, .exam-timerbar, .exam-footnav, .exam-confirm, .cover-actions, .cover-status,
  .result-actions, .site-foot, .no-print, #cas-toast { display: none !important; }
  .exam-runner, .exam-hub { max-width: none; padding: 0; }
  .exam-paper { border: 0; box-shadow: none; }
  .paper-header, .section-paper-head, .paper-body, .paper-foot { padding-left: 0; padding-right: 0; }
  .paper-stamp { position: static; display: inline-block; transform: none; margin-bottom: 8px; }
  .exam-task { break-inside: auto; }
  .exam-task + .exam-task { border-top-color: #999; }
  .reading-text p, .mcq-item, .example-box, .wordbank, .audio-panel, .match-item, .writing-prompt, .selfscore { break-inside: avoid; }
  .task-head, .task-instructions { break-after: avoid; }
  .reading-text, .gap-text { max-width: none; }
  .review-section { break-inside: avoid; }
  .review-section > summary { background: #f2f2f2; }
  .review-section:not([open]) .review-body { display: block; }
  a { color: #111 !important; text-decoration: none; }
}