:root {
  --bg: #f4f6fb; --card: #fff; --fg: #18192b; --muted: #5f6378; --line: #e3e6f0; --accent: #2f5bea; --accent-soft: #e6ecff;
  --ok: #177a42; --ok-soft: #e3f7eb; --bad: #c42b3a; --bad-soft: #fde8ea; --yellow: #ffd34d; --on-accent: #fff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1020; --card: #191a2e; --fg: #eef0fa; --muted: #a6aac4; --line: #2a2c45; --accent: #7c9bff; --accent-soft: #232a55;
    --ok: #4fd18b; --ok-soft: #173327; --bad: #ff7b86; --bad-soft: #3a1c22; --on-accent: #0f1020; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.65 "Pretendard", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", system-ui, sans-serif; }
[hidden] { display: none !important; }
a { color: var(--accent); }
.top { display: flex; align-items: center; justify-content: space-between; max-width: 760px; margin: 0 auto; padding: 12px 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--fg); text-decoration: none; font-weight: 850; font-size: 1.1rem; }
.top select { width: auto; }
main { max-width: 760px; margin: 0 auto; padding: 0 16px 24px; }
footer { max-width: 760px; margin: 0 auto; padding: 8px 16px 40px; color: var(--muted); font-size: .8rem; text-align: center; }
footer a { color: var(--muted); }
h1 { font-size: 1.6rem; margin: 6px 0; letter-spacing: -.02em; }
h2 { font-size: 1.05rem; margin: 26px 0 10px; }
.muted { color: var(--muted); }
.note { color: var(--muted); font-size: .88rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 16px; }
.hero { background: linear-gradient(135deg, #2f5bea, #7b4dff); color: #fff; border-radius: 20px; padding: 22px 20px; }
.hero h1 { margin: 0 0 4px; }
.hero p { margin: 0; opacity: .92; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 10px; }
.mode { display: flex; flex-direction: column; gap: 4px; padding: 16px; background: var(--card); border: 1px solid var(--line); border-radius: 16px; color: var(--fg); text-decoration: none; }
.mode:hover { border-color: var(--accent); }
.mode.off { opacity: .55; pointer-events: none; }
.badge { align-self: flex-start; font-size: .75rem; font-weight: 800; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.chip { padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line); text-decoration: none; color: var(--fg); font-size: .9rem; font-weight: 600; }
.chip:hover { border-color: var(--accent); color: var(--accent); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; border: 0; border-radius: 12px; padding: 11px 18px; min-height: 46px;
  font: inherit; font-weight: 800; background: var(--accent); color: var(--on-accent); cursor: pointer; text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.btn[disabled] { opacity: .45; cursor: default; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { justify-content: space-between; }
select, input { font: inherit; color: var(--fg); background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; }
.check { display: flex; gap: 8px; align-items: center; margin-top: 14px; color: var(--muted); font-size: .9rem; }

/* question */
.qhead { display: flex; gap: 10px; align-items: center; justify-content: space-between; flex-wrap: wrap; margin: 4px 0 10px; }
.timer { font-weight: 900; font-variant-numeric: tabular-nums; padding: 4px 12px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.timer.low { background: var(--bad-soft); color: var(--bad); }
.instr { font-weight: 700; margin: 0 0 4px; }
.en { display: block; color: var(--muted); font-size: .85rem; font-weight: 400; }
.listen { margin: 12px 0; padding: 12px; border-radius: 12px; background: var(--accent-soft); }
.speakers { font-weight: 900; color: var(--accent); min-width: 2em; }
.audio-status { display: inline-flex; align-items: center; gap: 7px; min-height: 24px; font-size: .9rem; }
.audio-spinner { display: none; width: 15px; height: 15px; flex: none; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: audio-spin .8s linear infinite; }
.listen[data-audio-state="loading"] .audio-spinner,
.listen[data-audio-state="buffering"] .audio-spinner { display: inline-block; }
@keyframes audio-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .audio-spinner { animation: none; border-right-color: var(--accent); } }
.script { margin-top: 8px; }
.script p { margin: 4px 0; }
.sp { display: inline-block; min-width: 28px; text-align: center; font-size: .8rem; font-weight: 800; border-radius: 8px; padding: 1px 6px; }
.sp-m { background: #dbe7ff; color: #1d4ed8; } .sp-f { background: #ffe0ee; color: #be185d; } .sp-n { background: var(--line); }
.passage { white-space: pre-line; margin: 12px 0; padding: 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--bg); line-height: 1.85; }
.realia { margin: 12px auto; max-width: 420px; border-radius: 14px; border: 2px solid var(--fg); padding: 14px 16px; background: var(--card); }
.realia .rt { font-weight: 900; text-align: center; font-size: 1.05rem; margin-bottom: 8px; padding-bottom: 6px; border-bottom: 2px dashed var(--line); }
.realia .rr { padding: 3px 0; }
.realia-message { border-radius: 22px; border-color: var(--accent); background: var(--accent-soft); }
.realia-ticket { border-style: dashed; }
.realia-menu .rr { display: flex; justify-content: space-between; }
.opts { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.opts.pics { grid-template-columns: 1fr 1fr; }
.opt { width: 100%; display: flex; gap: 10px; align-items: flex-start; text-align: left; font: inherit; color: var(--fg); background: var(--card);
  border: 2px solid var(--line); border-radius: 12px; padding: 10px 12px; cursor: pointer; }
.opt:hover:not([disabled]) { border-color: var(--accent); }
.opt .n { flex: none; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); font-weight: 800; font-size: .85rem; }
.opt.chosen { border-color: var(--accent); background: var(--accent-soft); }
.opt.right { border-color: var(--ok); background: var(--ok-soft); }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opts.pics .opt { flex-direction: column; align-items: center; text-align: center; min-width: 0; }
.scene { display: flex; flex-direction: column; align-items: center; gap: 4px; min-width: 0; }
.sc-ico { font-size: 1.7rem; line-height: 1.2; letter-spacing: 2px; }
.sc-cap { font-size: .8rem; color: var(--muted); line-height: 1.35; word-break: keep-all; }
.explain { margin-top: 14px; padding: 12px 14px; border-radius: 12px; }
.explain.ok { background: var(--ok-soft); } .explain.bad { background: var(--bad-soft); }
.explain p { margin: 4px 0; }
.nav { margin-top: 14px; }

/* result */
.result { text-align: center; }
.big { font-size: 3rem; font-weight: 900; color: var(--accent); }
.big small { font-size: 1.1rem; color: var(--muted); }
.lv { font-size: 1.2rem; font-weight: 800; margin: 0; }
.bar { display: grid; grid-template-columns: 140px 1fr 50px; gap: 10px; align-items: center; margin: 6px 0; font-size: .9rem; }
.track { height: 10px; background: var(--line); border-radius: 999px; overflow: hidden; }
.track i { display: block; height: 100%; background: var(--ok); }
.bar.low .track i { background: var(--bad); }
.ad { margin-top: 22px; min-height: 0; }
.ad-label { display: block; font-size: .7rem; color: var(--muted); margin-bottom: 4px; }

.mini-chart { display: flex; flex-direction: column; align-items: center; width: 100%; color: var(--fg); }
.mini-chart svg { width: 100%; max-width: 220px; height: auto; }
.mini-chart .mc-legend { display: flex; flex-direction: column; font-size: .72rem; line-height: 1.3; color: var(--muted); text-align: left; }

/* home: main navigation tiles under the hero */
.quick { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-top: 12px; }
.qtile { display: flex; flex-direction: column; gap: 2px; min-width: 0; padding: 12px; background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  color: var(--fg); text-decoration: none; font: inherit; text-align: left; cursor: pointer; }
.qtile:hover { border-color: var(--accent); }
.qtile b { font-size: .95rem; overflow-wrap: anywhere; }
.qtile span { font-size: .78rem; color: var(--muted); line-height: 1.35; overflow-wrap: anywhere; }
.qtile.hot { border-color: var(--accent); background: var(--accent-soft); }
@media (max-width: 680px) { .quick { grid-template-columns: 1fr 1fr; } .quick > :last-child:nth-child(odd) { grid-column: 1 / -1; } }

/* mock question map (navigator), resume card and install hint */
.btn.sm { min-height: 44px; padding: 8px 14px; }
.qmbar { flex-wrap: nowrap; margin: 0 0 10px; align-items: stretch; }
.qm-toggle { flex: 1 1 0; min-width: 0; justify-content: space-between; text-align: left; white-space: normal; line-height: 1.3; gap: 8px; flex-wrap: wrap; }
.qm-toggle .muted { font-weight: 600; font-size: .85rem; }
.qmap { margin: -2px 0 12px; padding: 12px; max-height: 50vh; overflow: auto; }
.qm-sec { font-size: .8rem; font-weight: 800; color: var(--muted); margin: 8px 0 6px; }
.qm-sec:first-child { margin-top: 0; }
.qm-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 6px; }
.qn { position: relative; min-width: 0; height: 40px; padding: 0; border: 2px solid var(--line); border-radius: 10px; background: var(--card); color: var(--fg);
  font: inherit; font-weight: 700; font-size: .9rem; font-variant-numeric: tabular-nums; cursor: pointer; }
.qn:hover { border-color: var(--accent); }
.qn.done { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.qn.cur { outline: 3px solid var(--fg); outline-offset: 1px; text-decoration: underline; }
.qn i { position: absolute; top: -6px; right: -3px; font-style: normal; font-size: .75rem; line-height: 1; color: var(--bad); background: var(--card); border-radius: 50%; padding: 1px; }
.qm-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 12px; font-size: .8rem; color: var(--muted); }
.qm-legend span { display: inline-flex; align-items: center; gap: 6px; }
.qn-sw { position: relative; display: inline-block; width: 18px; height: 18px; border: 2px solid var(--line); border-radius: 5px; background: var(--card); font-style: normal; font-size: .7rem; line-height: 14px; text-align: center; color: var(--bad); }
.qn-sw.done { background: var(--accent-soft); border-color: var(--accent); }
.qn-sw.flag { border-color: var(--bad); }
.flagbtn { margin-top: 12px; min-height: 40px; padding: 6px 14px; font-weight: 700; }
.flagbtn[aria-pressed="true"] { border-color: var(--bad); color: var(--bad); background: var(--bad-soft); }
.resume, .install { margin: 12px 0; }
.resume { border-color: var(--accent); background: var(--accent-soft); }
.resume p, .install p { margin: 4px 0 10px; }