:root {
  --bg: #f7f5f0; --card: #ffffff; --ink: #1d2230; --soft: #5b6273; --line: #e3ded3;
  --brand: #1f2a44; --gold: #b8892b; --gold-soft: #f4ead3;
  --ok: #2a7f62; --ok-soft: #e1f2ea; --warn: #a8651b; --warn-soft: #fbecd9; --bad: #b0413e; --bad-soft: #f8e1df;
  --radius: 14px; --shadow: 0 1px 2px rgba(20,25,40,.06), 0 6px 18px rgba(20,25,40,.06);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12151d; --card: #1b2030; --ink: #e9e6df; --soft: #a3a9b8; --line: #2c3346;
    --brand: #e9e6df; --gold: #d6aa4f; --gold-soft: #2e2818;
    --ok: #5cc39b; --ok-soft: #173229; --warn: #e3a35a; --warn-soft: #33261a; --bad: #e57d78; --bad-soft: #3a1f1f;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 Inter, system-ui, sans-serif; }
a { color: inherit; }
h1, h2, h3 { font-family: Fraunces, Georgia, serif; font-weight: 600; line-height: 1.25; margin: 0 0 .4em; }
h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); }
h2 { font-size: 1.3rem; }
button { font: inherit; cursor: pointer; }

.bar { position: sticky; top: 0; z-index: 5; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; background: var(--bg); border-bottom: 1px solid var(--line); }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 500; }
.seal { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; font: 600 .8rem Fraunces, serif;
  background: var(--gold); color: #fff; letter-spacing: .04em; }
nav { display: flex; gap: 4px; }
nav a { text-decoration: none; padding: 6px 10px; border-radius: 8px; color: var(--soft); font-size: .95rem; }
nav a.on { color: var(--ink); background: var(--card); box-shadow: var(--shadow); }

main { max-width: 860px; margin: 0 auto; padding: 20px 16px 40px; }
.foot { max-width: 860px; margin: 0 auto; padding: 0 16px 32px; color: var(--soft); font-size: .8rem; }

.hero { padding: 8px 0 16px; }
.hero p { color: var(--soft); margin: 0 0 16px; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.btn { text-decoration: none; display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--ink); padding: 10px 16px; border-radius: 10px; }
.btn:hover { border-color: var(--gold); }
.btn.primary { background: var(--brand); color: var(--bg); border-color: var(--brand); font-weight: 600; }
.btn.gold { background: var(--gold); color: #fff; border-color: var(--gold); font-weight: 600; }
.btn.small { padding: 6px 12px; font-size: .9rem; }
.btn[disabled] { opacity: .45; cursor: default; }

.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: var(--card); }
.seg button { border: 0; background: none; padding: 7px 12px; color: var(--soft); font-size: .9rem; }
.seg button.on { background: var(--gold-soft); color: var(--ink); font-weight: 600; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; margin-top: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
a.card { text-decoration: none; display: block; }
a.card:hover { border-color: var(--gold); }
.card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.meta { color: var(--soft); font-size: .85rem; }
.meter { height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; margin-top: 10px; }
.meter i { display: block; height: 100%; background: var(--gold); }

.tag { display: inline-block; font-size: .75rem; font-weight: 600; padding: 2px 8px; border-radius: 99px; vertical-align: middle; }
.tag.ok { background: var(--ok-soft); color: var(--ok); }
.tag.warn { background: var(--warn-soft); color: var(--warn); }
.tag.myth { background: #efe4f6; color: #7a3e9d; }
.tag.complaint { background: var(--bad-soft); color: var(--bad); }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .tag.myth { background: #2d2136; color: #c99be0; } }

.subs { list-style: none; padding: 0; margin: 12px 0 0; }
.subs li { display: flex; justify-content: space-between; gap: 10px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.subs a { text-decoration: none; }
.subs a:hover { color: var(--gold); }

.lesson .q { font-family: Fraunces, Georgia, serif; font-size: clamp(1.25rem, 3vw, 1.5rem); line-height: 1.35; margin: 10px 0 14px; }
.lesson .top { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.think { color: var(--soft); font-style: italic; }
.short { background: var(--gold-soft); border-radius: 10px; padding: 12px 14px; margin: 12px 0; }
.full { margin-top: 8px; }
.full p { margin: 0 0 .8em; }
.full ul, .full ol { margin: 0 0 .8em; padding-left: 1.3em; }
.full h4 { font: 600 1rem Inter, sans-serif; margin: 1em 0 .3em; }
.why { background: var(--warn-soft); color: var(--ink); border-radius: 10px; padding: 10px 12px; font-size: .88rem; margin-top: 12px; }
.alt { margin-top: 12px; font-size: .9rem; color: var(--soft); }
.alt ul { margin: 4px 0 0; padding-left: 1.2em; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line); }
.progress-line { color: var(--soft); font-size: .85rem; }
.speaking { outline: 2px solid var(--gold); outline-offset: 4px; border-radius: 6px; }

.opt { display: block; width: 100%; text-align: left; margin: 8px 0; padding: 12px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); line-height: 1.45; }
.opt:hover:not([disabled]) { border-color: var(--gold); }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.score { font-family: Fraunces, serif; font-size: 2.4rem; }

input[type=search] { width: 100%; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--card);
  color: var(--ink); font: inherit; }
.hit { padding: 12px 0; border-bottom: 1px solid var(--line); }
.hit a { text-decoration: none; font-weight: 500; }
.hit a:hover { color: var(--gold); }
.settings label { max-width: 100%; }
.settings { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; font-size: .9rem; color: var(--soft); margin-top: 10px; }
.settings select { max-width: 100%; font: inherit; padding: 4px 6px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }

@media (max-width: 560px) {
  .brand span:last-child { display: none; }
  .btn { padding: 10px 13px; }
}

[hidden] { display: none !important; }

/* lessons */
.tag.soon { background: var(--line); color: var(--soft); }
.tick { color: var(--ok); font-weight: 700; }
.lessons { counter-reset: none; }
.lesson-page h1 { margin-top: 2px; }
.lesson-page .intro { font-size: 1.08rem; color: var(--ink); margin: 6px 0 14px; }
.lesson-page .sec { margin-top: 22px; padding: 4px 0; }
.lesson-page .sec h2 { font-size: 1.2rem; }
.lesson-page .sec p { margin: 0 0 .85em; }
.lesson-page .sec ul, .lesson-page .sec ol { margin: 0 0 .85em; padding-left: 1.3em; }
.lesson-page .sec h4 { font: 600 1rem Inter, sans-serif; margin: 1em 0 .3em; }
.keypoints { margin-top: 22px; background: var(--gold-soft); border-radius: 12px; padding: 14px 16px; }
.keypoints h2 { font-size: 1.1rem; }
.keypoints ul { margin: 0; padding-left: 1.2em; }
.check { margin-top: 16px; }
.qtext { font-family: Fraunces, Georgia, serif; font-size: 1.2rem; line-height: 1.4; margin: 6px 0 10px; }
.good { color: var(--ok); }
.bad { color: var(--bad); }
.miss { border-top: 1px solid var(--line); padding-top: 10px; margin-top: 10px; }
.miss p { margin: 0 0 4px; }
.speaking { background: var(--gold-soft); outline: none; border-radius: 10px; box-shadow: 0 0 0 6px var(--gold-soft); }

/* read mode */
.modes { margin-top: -4px; }
.readbar { margin-bottom: 12px; }
.readbar select { font: inherit; padding: 8px 10px; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: var(--ink); max-width: 100%; flex: 1 1 260px; }
.reading .qa { padding: 18px 0 8px; border-top: 1px solid var(--line); margin-top: 14px; }
.reading .qa h2 { font-size: 1.15rem; line-height: 1.4; }
.reading .qa .tags { white-space: nowrap; }
.reading .lead { font-weight: 500; margin: 6px 0 10px; }
.reading .full p { margin: 0 0 .8em; }
.reading .full ul, .reading .full ol { margin: 0 0 .8em; padding-left: 1.3em; }
.pager { justify-content: space-between; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); }

/* exam */
.rules { padding-left: 1.2em; }
.rules li { margin: 4px 0; }
.exambar { position: sticky; top: 53px; z-index: 4; display: flex; justify-content: space-between; gap: 10px; align-items: center;
  background: var(--brand); color: var(--bg); border-radius: 10px; padding: 8px 14px; margin-bottom: 12px; font-size: .92rem; }
.clock { font: 600 1.1rem Inter, sans-serif; font-variant-numeric: tabular-nums; }
.clock.low { color: #ffb4ae; }
.opt.chosen { border-color: var(--brand); background: var(--gold-soft); font-weight: 500; }
.nav { margin-top: 14px; }
.nav summary { cursor: pointer; font-weight: 600; }
.grid-n { display: grid; grid-template-columns: repeat(auto-fill, minmax(38px, 1fr)); gap: 6px; margin: 12px 0; }
.grid-n .n { padding: 6px 0; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); font-size: .85rem; }
.grid-n .n.done { background: var(--brand); color: var(--bg); border-color: var(--brand); }
.grid-n .n.flag { box-shadow: 0 0 0 2px var(--gold); }
.grid-n .n.cur { outline: 2px solid var(--gold); outline-offset: 1px; }
.score span { font-size: 1.4rem; margin-left: 8px; }
.levels { margin: 14px 0; }
button.card.level { text-align: left; font: inherit; color: var(--ink); cursor: pointer; }
button.card.level:hover { border-color: var(--gold); }
.level h3 { font-size: 1.2rem; }
.level p { margin: 6px 0 0; font-size: .9rem; }
.tally { display: flex; flex-wrap: wrap; gap: 14px; margin: 6px 0 14px; font-weight: 500; }
.tbl { overflow-x: auto; margin: 0 0 .9em; }
.tbl table { border-collapse: collapse; font-size: .9rem; min-width: 60%; }
.tbl th, .tbl td { border: 1px solid var(--line); padding: 6px 9px; text-align: left; vertical-align: top; }
.tbl th { background: var(--gold-soft); }

/* exam track */
.rowid { font: 600 .75rem Inter, sans-serif; color: var(--gold); margin-right: 4px; }
.formulas, .worked, .traps { margin-top: 22px; }
.formula { border-left: 3px solid var(--gold); padding: 6px 12px; margin: 10px 0; background: var(--gold-soft); border-radius: 0 8px 8px 0; }
.formula .fx { font-family: ui-monospace, Menlo, monospace; font-size: .92rem; margin: 4px 0; white-space: pre-wrap; }
.worked details { border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; margin: 8px 0; }
.worked summary { cursor: pointer; font-weight: 500; }
.traps ul { padding-left: 1.2em; }
.traps li { margin: 4px 0; }
.explain { background: var(--gold-soft); border-radius: 10px; padding: 10px 14px; margin: 10px 0; font-size: .95rem; }
.explain p { margin: 0 0 .5em; }
.marks { font-size: .75rem; color: var(--soft); margin-top: 18px; }
.qtext p { margin: 0 0 .5em; }
.casebox summary { cursor: pointer; }
.caseprofile { margin-top: 10px; max-height: 60vh; overflow: auto; font-size: .93rem; }
.caseprofile p { margin: 0 0 .7em; }

textarea.cr { width: 100%; box-sizing: border-box; margin: 10px 0; padding: 10px; font: inherit; border: 1px solid var(--line, #ddd); border-radius: 8px; }
.gpt { display: inline-block; margin: 4px 0; }
.crans { margin: 10px 0; padding: 10px; border-left: 3px solid var(--line, #ddd); }

/* three tabs: Learn | Practice | Mock test */
nav a { white-space: nowrap; }
@media (max-width: 560px) { nav { overflow-x: auto; min-width: 0; } nav a { padding: 6px 7px; font-size: .9rem; } }
.tabs3 { display: flex; gap: 4px; margin: 10px 0 16px; padding: 4px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); }
.tabs3 a { flex: 1 1 0; text-align: center; text-decoration: none; padding: 9px 8px; border-radius: 9px; color: var(--soft); font-weight: 500; }
.tabs3 a:hover { color: var(--ink); background: var(--gold-soft); }
.tabs3 a.on { background: var(--brand); color: var(--bg); font-weight: 600; }
.tabs3 a.soon .tag { margin-left: 4px; }
@media (max-width: 560px) { .tabs3 a { padding: 8px 4px; font-size: .92rem; } .tabs3 a.soon .tag { display: block; width: fit-content; margin: 2px auto 0; } }

/* hints */
.hintrow { margin-top: 6px; }
.hint { background: var(--gold-soft); border-left: 3px solid var(--gold); border-radius: 0 8px 8px 0; padding: 8px 12px; margin: 8px 0; font-size: .95rem; }
.whyexam { border-left: 3px solid var(--brand); padding: 6px 12px; margin: 10px 0; font-size: .93rem; }

/* records, sign-in, dashboard */
.recnote { margin: 14px 0 0; padding: 10px 12px; border-radius: 10px; background: var(--gold-soft); font-size: .92rem; }
.recnote.account { background: var(--ok-soft); }
.signin input[type=email], .signin input#code { display: block; width: 100%; max-width: 380px; margin: 6px 0 12px; padding: 11px 13px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink); font: inherit; }
.signin input#code { letter-spacing: .3em; font-size: 1.2rem; max-width: 200px; }
.consent { display: block; margin: 8px 0 14px; font-size: .9rem; color: var(--soft); }
.consent input { margin-right: 6px; }
.dashbar { justify-content: space-between; margin: 12px 0; }
.dashbar select { font: inherit; padding: 6px 8px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
.dash { margin-top: 14px; }
.dash .top { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.dash h2 a { text-decoration: none; }
.dash h3 { margin-top: 14px; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; margin: 8px 0 6px; }
.stats div { display: flex; flex-direction: column; }
.stats b { font: 600 1.5rem Fraunces, Georgia, serif; }
.chart { width: 100%; height: auto; display: block; margin: 6px 0; }
.chart text { fill: var(--soft); font: 13px Inter, sans-serif; }
.chart .g { stroke: var(--line); stroke-width: 1; }
.chart .l { fill: none; stroke: var(--gold); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.chart .d { fill: var(--gold); stroke: var(--card); stroke-width: 2; }
.chart .hit { fill: transparent; }
.chart .pt:hover .d { r: 6; }
.dash details { margin: 10px 0; }
.dash summary { cursor: pointer; }

/* read-aloud highlighting (6-Nov-2026) */
.w.sent { background: rgba(201,162,39,.16); border-radius: 3px; }
.w.now { background: var(--gold); color: #fff; border-radius: 3px; box-shadow: 0 0 0 2px var(--gold); }

/* study timer (6-Nov-2026) */
.stimer { position: fixed; right: 16px; bottom: 16px; z-index: 50; max-width: calc(100vw - 32px); }
.stimer-pill { display: flex; align-items: center; gap: 8px; background: var(--card); box-shadow: var(--shadow); border-radius: 999px; padding: 6px 8px 6px 14px; }
.stimer-pill.run .stimer-time b { color: var(--ink); font-variant-numeric: tabular-nums; }
.stimer-pill.paused { opacity: .9; }
.stimer-card { display: flex; flex-direction: column; gap: 8px; background: var(--card); box-shadow: var(--shadow); border-radius: 14px; padding: 14px; width: 300px; max-width: 100%; }
.stimer-card.done { border: 2px solid var(--gold); }
.stimer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.stimer-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.stimer-row input { width: 80px; padding: 4px 6px; }
.stimer-open { box-shadow: var(--shadow); }
@media print { .stimer { display: none; } }

/* Downloads page */
.dl-list { list-style: none; padding: 0; margin: 0; }
.dl-doc { border-top: 1px solid var(--line); padding: 14px 0; }
.dl-doc:first-child { border-top: 0; }
.dl-doc p { margin: 6px 0; }
.dl-group h3 { margin-top: 18px; }