:root {
  --bg: #f4f6fa;
  --surface: #ffffff;
  --surface-2: #eef2f8;
  --text: #121826;
  --muted: #5b6577;
  --line: #dde3ee;
  --primary: #0d47a1;
  --primary-ink: #ffffff;
  --primary-soft: #e3ecfb;
  --accent: #c2553a;
  --ok: #1b7f4b;
  --ok-soft: #e2f4ea;
  --bad: #b3261e;
  --bad-soft: #fbe5e3;
  --warn: #9a6400;
  --warn-soft: #fbf0d9;
  --geo: #1f7a8c;
  --his: #8a4b2a;
  --cul: #7a3f9a;
  --ins: #2f5aa8;
  --gram: #2e7d5b;
  --sea: #dcebf7;
  --land: #ffffff;
  --land-other: #e6e8ec;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 4px 16px rgba(16, 24, 40, .06);
  --font: "Noto Sans", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-el: "Noto Serif", "Noto Sans", Georgia, serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1220; --surface: #121a2b; --surface-2: #1a2438; --text: #e8edf6; --muted: #9aa6bb;
    --line: #26324a; --primary: #6ea0ff; --primary-ink: #0b1220; --primary-soft: #1b2a48;
    --accent: #f08a6c; --ok: #4cc58a; --ok-soft: #12301f; --bad: #ff8a80; --bad-soft: #3a1714;
    --warn: #f0b84d; --warn-soft: #33270c; --geo: #5cc2d4; --his: #d9966e; --cul: #c58fe0; --ins: #8fb0f0; --gram: #6fcf9f;
    --sea: #12233a; --land: #1f2c44; --land-other: #172033;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b1220; --surface: #121a2b; --surface-2: #1a2438; --text: #e8edf6; --muted: #9aa6bb;
  --line: #26324a; --primary: #6ea0ff; --primary-ink: #0b1220; --primary-soft: #1b2a48;
  --accent: #f08a6c; --ok: #4cc58a; --ok-soft: #12301f; --bad: #ff8a80; --bad-soft: #3a1714;
  --warn: #f0b84d; --warn-soft: #33270c; --geo: #5cc2d4; --his: #d9966e; --cul: #c58fe0; --ins: #8fb0f0; --gram: #6fcf9f;
  --sea: #12233a; --land: #1f2c44; --land-other: #172033;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text); font: 16px/1.55 var(--font);
  min-height: 100vh; display: flex; flex-direction: column;
}
a { color: var(--primary); }
button { font: inherit; color: inherit; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; }
h3 { font-size: 1.02rem; }
p { margin: 0 0 .75rem; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
[lang="el"], .el { font-family: var(--font-el); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; align-items: center; gap: 1rem;
  padding: .6rem max(16px, env(safe-area-inset-left)); background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(10px); border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: .55rem; text-decoration: none; color: var(--text); font-weight: 600; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 10px; display: grid; place-items: center;
  background: var(--primary); color: var(--primary-ink); font-family: var(--font-el); font-size: 1.15rem;
}
.brand-text b { font-weight: 500; color: var(--muted); }
.ver-badge {
  margin-left: -.5rem; padding: .1rem .45rem; border-radius: 999px; font-size: .72rem; font-weight: 600;
  text-decoration: none; color: var(--primary); background: var(--primary-soft); white-space: nowrap;
}
.ver-badge:hover { text-decoration: underline; }
.nav { display: flex; gap: .25rem; margin-left: auto; }
.nav a {
  text-decoration: none; color: var(--muted); padding: .4rem .75rem; border-radius: 999px; font-weight: 500; font-size: .95rem;
}
.nav a.active, .nav a:hover { color: var(--text); background: var(--surface-2); }
.top-actions { display: flex; gap: .35rem; }
.icon-btn {
  min-width: 38px; height: 38px; padding: 0 .55rem; border-radius: 10px; border: 1px solid var(--line);
  background: var(--surface); cursor: pointer; font-weight: 600; font-size: .85rem;
}
.icon-btn:hover { background: var(--surface-2); }

.tabbar { display: none; }
@media (max-width: 720px) {
  .nav { display: none; }
  .top-actions { margin-left: auto; }
  .tabbar {
    display: grid; grid-template-columns: repeat(5, 1fr); position: sticky; bottom: 0; z-index: 20;
    background: var(--surface); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
  }
  .tabbar a { display: flex; flex-direction: column; align-items: center; padding: .45rem 0 .4rem; text-decoration: none; color: var(--muted); font-size: 1.15rem; }
  .tabbar a small { font-size: .7rem; }
  .tabbar a.active { color: var(--primary); }
}

main { flex: 1; width: 100%; max-width: 980px; margin: 0 auto; padding: 1.25rem 16px 2.5rem; outline: none; }

.site-footer { max-width: 980px; margin: 0 auto; padding: 1.25rem 16px 2rem; font-size: .8rem; color: var(--muted); border-top: 1px solid var(--line); width: 100%; }
.site-footer p { margin: 0 0 .4rem; }

/* ---------- generic ---------- */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem 1.2rem;
}
.grid { display: grid; gap: 1rem; }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 820px) { .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid-2 { grid-template-columns: 1fr; } }
.stack > * + * { margin-top: 1rem; }
.row { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem; min-height: 44px; padding: .55rem 1.1rem;
  border-radius: 12px; border: 1px solid var(--line); background: var(--surface); cursor: pointer; font-weight: 600;
  text-decoration: none; color: var(--text); transition: transform .06s ease, background .15s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: var(--primary-ink); border-color: transparent; }
.btn-primary:hover { background: color-mix(in srgb, var(--primary) 88%, #000); }
.btn-ghost { background: transparent; border-color: transparent; }
.btn-block { width: 100%; }
.btn-sm { min-height: 34px; padding: .3rem .7rem; font-size: .875rem; border-radius: 10px; }

.pill { display: inline-flex; align-items: center; gap: .3rem; padding: .12rem .55rem; border-radius: 999px; font-size: .75rem; font-weight: 600; background: var(--surface-2); color: var(--muted); }
.pill.ok { background: var(--ok-soft); color: var(--ok); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }

.bar { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; display: flex; }
.bar > span { display: block; height: 100%; }
.seg-mature { background: var(--ok); }
.seg-young { background: color-mix(in srgb, var(--ok) 45%, var(--surface-2)); }
.seg-learning { background: var(--warn); }

/* ---------- home ---------- */
.hero { display: grid; grid-template-columns: 1.4fr 1fr; gap: 1rem; margin-bottom: 1rem; }
@media (max-width: 720px) { .hero { grid-template-columns: 1fr; } }
.hero-main h1 { font-size: 1.5rem; }
.hero-main .el-sub { font-family: var(--font-el); color: var(--muted); margin: -.2rem 0 .6rem; }
.today-num { font-size: 2.6rem; font-weight: 700; line-height: 1; }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: .5rem; }
.kpi { background: var(--surface-2); border-radius: 12px; padding: .6rem .7rem; }
.kpi b { display: block; font-size: 1.3rem; }
.kpi small { color: var(--muted); font-size: .75rem; }

.subject-card { display: flex; flex-direction: column; gap: .5rem; text-decoration: none; color: var(--text); border-top: 4px solid var(--c, var(--primary)); }
.subject-card:hover { border-color: var(--line); border-top-color: var(--c); background: color-mix(in srgb, var(--c) 4%, var(--surface)); }
.subject-card .ico { font-size: 1.5rem; }
.subject-card .el-name { font-family: var(--font-el); color: var(--muted); font-size: .9rem; }
.subject-card .meta { display: flex; justify-content: space-between; font-size: .8rem; color: var(--muted); }

.section-title { display: flex; align-items: baseline; gap: .5rem; margin: 1.6rem 0 .7rem; }
.section-title h2 { margin: 0; }

/* ---------- study card ---------- */
.study-head { display: flex; align-items: center; gap: .75rem; margin-bottom: .8rem; }
.study-head .bar { flex: 1; }
.qcard { padding: 1.3rem 1.3rem 1.1rem; }
.qmeta { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; margin-bottom: .7rem; }
.qtext { font-family: var(--font-el); font-size: 1.25rem; line-height: 1.45; margin: 0 0 .3rem; font-weight: 500; }
.qtrans { color: var(--muted); font-size: .95rem; margin: .1rem 0 0; }
.qtrans.hidden-tr { display: none; }
.reveal-tr { font-size: .8rem; padding: 0; border: 0; background: none; color: var(--primary); cursor: pointer; text-decoration: underline; text-underline-offset: 2px; }
.speak { border: 0; background: none; cursor: pointer; font-size: 1rem; color: var(--muted); padding: .1rem .3rem; border-radius: 6px; }
.speak:hover { background: var(--surface-2); color: var(--text); }

.qcard:not(.show-tr) .tr-x { display: none; }
.qcard.show-tr .reveal-tr { display: none; }
.opt.picked { border-color: var(--primary); background: var(--primary-soft); }
.opt.picked .letter { background: var(--primary); color: var(--primary-ink); }

.options { display: grid; gap: .55rem; margin-top: 1rem; }
.opt {
  display: grid; grid-template-columns: 30px 1fr; gap: .6rem; align-items: start; text-align: left; width: 100%;
  padding: .7rem .8rem; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; min-height: 48px;
}
.opt:hover:not(:disabled) { border-color: var(--primary); }
.opt .letter { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: var(--surface-2); font-family: var(--font-el); font-weight: 600; font-size: .9rem; }
.opt .o-el { font-family: var(--font-el); display: block; }
.opt .o-tr { display: block; color: var(--muted); font-size: .85rem; }
.opt.correct { border-color: var(--ok); background: var(--ok-soft); }
.opt.correct .letter { background: var(--ok); color: #fff; }
.opt.wrong { border-color: var(--bad); background: var(--bad-soft); }
.opt.wrong .letter { background: var(--bad); color: #fff; }
.opt:disabled { cursor: default; }

.tf-list, .match-list, .fill-list { display: grid; gap: .6rem; margin-top: 1rem; }
.tf-item, .match-item {
  display: grid; grid-template-columns: 1fr auto; gap: .6rem; align-items: center; padding: .65rem .8rem;
  border: 1.5px solid var(--line); border-radius: 12px; background: var(--surface);
}
@media (max-width: 560px) { .tf-item, .match-item { grid-template-columns: 1fr; } }
.tf-item.correct, .match-item.correct, .fill-item.correct { border-color: var(--ok); background: var(--ok-soft); }
.tf-item.wrong, .match-item.wrong, .fill-item.wrong { border-color: var(--bad); background: var(--bad-soft); }
.tf-btns { display: flex; gap: .35rem; }
.tf-btns button { min-width: 64px; min-height: 40px; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-weight: 600; }
.tf-btns button[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }
.item-el { font-family: var(--font-el); }
.item-tr { display: block; color: var(--muted); font-size: .85rem; }
.fix { display: block; font-size: .8rem; font-weight: 600; margin-top: .2rem; }
.fix.ok { color: var(--ok); } .fix.bad { color: var(--bad); }

select.sel {
  min-height: 42px; max-width: 100%; padding: .4rem .6rem; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--surface); color: var(--text); font: inherit; font-size: .92rem;
}
.fill-text { font-family: var(--font-el); font-size: 1.1rem; line-height: 2.1; margin-top: .8rem; }
.fill-text .blank { display: inline-block; min-width: 2.2em; padding: 0 .3em; border-bottom: 2px solid var(--primary); text-align: center; color: var(--primary); font-weight: 600; }
.bank { display: flex; flex-wrap: wrap; gap: .35rem; margin: .5rem 0; }
.bank span { font-family: var(--font-el); padding: .15rem .55rem; border-radius: 8px; background: var(--surface-2); font-size: .9rem; }
.fill-item { display: grid; grid-template-columns: auto 1fr; gap: .6rem; align-items: center; padding: .5rem .7rem; border: 1.5px solid var(--line); border-radius: 12px; }

.answer-box { margin-top: 1rem; padding: .9rem 1rem; border-radius: 12px; background: var(--ok-soft); border: 1px solid color-mix(in srgb, var(--ok) 35%, transparent); }
.answer-box h3 { color: var(--ok); font-size: .85rem; text-transform: uppercase; letter-spacing: .04em; margin-bottom: .35rem; }
.answer-box .a-el { font-family: var(--font-el); white-space: pre-line; }
.answer-box .a-tr { color: var(--muted); font-size: .9rem; white-space: pre-line; margin-top: .35rem; }
.answer-box ol, .answer-box ul { margin: .2rem 0 0; padding-left: 1.3rem; }
.note { margin-top: .8rem; padding: .6rem .8rem; border-radius: 10px; background: var(--warn-soft); color: var(--text); font-size: .85rem; }

.actions { display: flex; flex-direction: column; gap: .5rem; margin-top: 1.1rem; }
.actions > .btn { align-self: flex-start; }
.actions .grades { margin-top: 0; }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: .45rem; margin-top: 1.1rem; }
.grades button { min-height: 52px; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-weight: 600; display: flex; flex-direction: column; align-items: center; justify-content: center; line-height: 1.2; }
.grades button small { font-weight: 400; color: var(--muted); font-size: .72rem; }
.grades .g-again { border-color: color-mix(in srgb, var(--bad) 50%, var(--line)); color: var(--bad); }
.grades .g-hard { border-color: color-mix(in srgb, var(--warn) 50%, var(--line)); color: var(--warn); }
.grades .g-good { border-color: color-mix(in srgb, var(--ok) 50%, var(--line)); color: var(--ok); }
.grades .g-easy { border-color: color-mix(in srgb, var(--primary) 50%, var(--line)); color: var(--primary); }
.kbd-hint { font-size: .75rem; color: var(--muted); margin-top: .6rem; text-align: center; }
@media (hover: none) { .kbd-hint { display: none; } }

/* ---------- question pictures ---------- */
.q-figs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .6rem; margin: .9rem 0 .2rem; }
.q-figs.one { grid-template-columns: minmax(0, 420px); justify-content: center; }
.q-fig { margin: 0; background: var(--surface-2); border-radius: 12px; padding: .45rem; position: relative; }
.q-fig img { display: block; width: 100%; height: auto; max-height: 340px; object-fit: contain; border-radius: 8px; background: var(--surface); }
.q-slot { position: absolute; top: .7rem; left: .7rem; background: var(--primary); color: var(--primary-ink); font-weight: 700; font-size: .8rem; padding: .1rem .5rem; border-radius: 999px; z-index: 1; }
.q-fig figcaption { font-size: .72rem; color: var(--muted); margin-top: .3rem; line-height: 1.35; word-break: break-word; }
.q-fig .img-subj { color: var(--text); font-size: .82rem; font-weight: 600; }
.qcard:not(.answered) .img-subj { display: none; }

/* ---------- map ---------- */
.map-wrap { margin-top: 1rem; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: var(--sea); }
.map-wrap svg { display: block; width: 100%; height: auto; }
.map-wrap .gr { fill: var(--land); stroke: color-mix(in srgb, var(--primary) 45%, var(--line)); stroke-width: .7; }
.map-wrap .other { fill: var(--land-other); stroke: var(--line); stroke-width: .6; }
.map-wrap .pin circle { fill: var(--accent); stroke: #fff; stroke-width: 2; }
.map-wrap .pin text { font: 600 13px var(--font); fill: #fff; text-anchor: middle; dominant-baseline: central; pointer-events: none; }
.map-wrap .pin .lbl { font: 600 12px var(--font); fill: var(--text); text-anchor: start; paint-order: stroke; stroke: var(--sea); stroke-width: 3px; dominant-baseline: central; }
.map-wrap .guess { fill: var(--primary); opacity: .85; }
.map-wrap .guess-line { stroke: var(--primary); stroke-dasharray: 4 3; stroke-width: 1.5; }
.place-list { display: grid; gap: .3rem; margin: .6rem 0 0; padding: 0; list-style: none; }
.place-list li { display: flex; gap: .5rem; align-items: baseline; }
.place-list .num { width: 22px; height: 22px; flex: none; border-radius: 50%; display: grid; place-items: center; background: var(--accent); color: #fff; font-size: .75rem; font-weight: 700; }
.place-list li.active .num { outline: 3px solid color-mix(in srgb, var(--primary) 50%, transparent); }
.place-list .d { font-size: .78rem; color: var(--muted); }

/* ---------- lists ---------- */
.qlist { display: grid; gap: .5rem; }
.qrow { display: grid; grid-template-columns: 46px 1fr auto; gap: .7rem; align-items: center; padding: .7rem .9rem; text-decoration: none; color: var(--text); }
.qrow .num { font-weight: 700; color: var(--muted); font-size: .85rem; }
.qrow .t-el { font-family: var(--font-el); display: block; }
.qrow .t-tr { display: block; color: var(--muted); font-size: .85rem; }
.qrow details { grid-column: 1 / -1; }
.toolbar { display: flex; gap: .5rem; flex-wrap: wrap; margin-bottom: 1rem; }
.toolbar input[type="search"] { flex: 1; min-width: 200px; min-height: 44px; padding: .5rem .8rem; border-radius: 12px; border: 1.5px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }
.chips { display: flex; gap: .35rem; flex-wrap: wrap; }
.chip { display: inline-flex; align-items: center; text-decoration: none; color: var(--text); min-height: 36px; padding: .3rem .8rem; border-radius: 999px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-size: .85rem; font-weight: 500; }
.chip[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); border-color: var(--primary); }

/* ---------- exam ---------- */
.timer { font-variant-numeric: tabular-nums; font-weight: 700; padding: .2rem .7rem; border-radius: 999px; background: var(--surface-2); }
.timer.low { background: var(--bad-soft); color: var(--bad); }
.exam-nav { display: flex; flex-wrap: wrap; gap: .3rem; margin: .8rem 0 1rem; }
.exam-nav button { width: 36px; height: 36px; border-radius: 9px; border: 1.5px solid var(--line); background: var(--surface); cursor: pointer; font-size: .8rem; font-weight: 600; }
.exam-nav button.done { background: var(--primary-soft); border-color: var(--primary); }
.exam-nav button.cur { outline: 2px solid var(--primary); outline-offset: 1px; }
.exam-nav button.ok { background: var(--ok-soft); border-color: var(--ok); color: var(--ok); }
.exam-nav button.bad { background: var(--bad-soft); border-color: var(--bad); color: var(--bad); }
.score-big { font-size: 3rem; font-weight: 800; line-height: 1; }
.verdict { font-size: 1.15rem; font-weight: 700; }
.verdict.pass { color: var(--ok); } .verdict.fail { color: var(--bad); }
.self-check { display: flex; gap: .5rem; margin-top: .8rem; }

/* ---------- stats ---------- */
.heat { display: grid; grid-auto-flow: column; grid-template-rows: repeat(7, 12px); gap: 3px; overflow-x: auto; padding-bottom: .3rem; }
.heat span { width: 12px; height: 12px; border-radius: 3px; background: var(--surface-2); }
.heat span[data-l="1"] { background: color-mix(in srgb, var(--ok) 30%, var(--surface-2)); }
.heat span[data-l="2"] { background: color-mix(in srgb, var(--ok) 55%, var(--surface-2)); }
.heat span[data-l="3"] { background: color-mix(in srgb, var(--ok) 80%, var(--surface-2)); }
.heat span[data-l="4"] { background: var(--ok); }
.legend { display: flex; gap: .9rem; flex-wrap: wrap; font-size: .8rem; color: var(--muted); margin-top: .5rem; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: .3rem; vertical-align: -1px; }
.table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.table th, .table td { text-align: left; padding: .5rem .4rem; border-bottom: 1px solid var(--line); }
.table th { color: var(--muted); font-weight: 600; font-size: .78rem; text-transform: uppercase; letter-spacing: .03em; }
.table td.num, .table th.num { text-align: right; font-variant-numeric: tabular-nums; }
.examchart { display: flex; align-items: flex-end; gap: 4px; height: 120px; border-bottom: 1px solid var(--line); padding-top: 8px; position: relative; }
.examchart .b { flex: 1; max-width: 26px; border-radius: 4px 4px 0 0; background: var(--primary); min-height: 3px; }
.examchart .b.fail { background: var(--bad); }
.examchart .pass-line { position: absolute; left: 0; right: 0; border-top: 1.5px dashed var(--muted); }

/* ---------- settings / forms ---------- */
.field { display: grid; gap: .3rem; margin-bottom: 1rem; }
.field label { font-weight: 600; font-size: .9rem; }
.field .hint { font-size: .8rem; color: var(--muted); }
.seg { justify-self: start; display: inline-flex; border: 1.5px solid var(--line); border-radius: 12px; overflow: hidden; }
.seg button { border: 0; background: var(--surface); padding: .5rem .9rem; cursor: pointer; font-weight: 500; min-height: 40px; }
.seg button[aria-pressed="true"] { background: var(--primary); color: var(--primary-ink); }
input[type="number"] { min-height: 42px; width: 110px; padding: .4rem .6rem; border-radius: 10px; border: 1.5px solid var(--line); background: var(--surface); color: var(--text); font: inherit; }

#toast {
  position: fixed; left: 50%; bottom: calc(80px + env(safe-area-inset-bottom)); transform: translateX(-50%) translateY(20px);
  background: var(--text); color: var(--bg); padding: .6rem 1rem; border-radius: 12px; font-size: .9rem; opacity: 0; pointer-events: none; transition: .2s; z-index: 50; max-width: calc(100% - 32px);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- vocabulary ---------- */
.word-card { max-width: 560px; margin: 0 auto; }
.word-prompt { text-align: center; padding: .6rem 0 .2rem; }
.word-pic { font-size: 5.5rem; line-height: 1.1; margin-bottom: .3rem; }
.word-pic.sm { font-size: 3rem; }
.word-big { font-size: 1.7rem; font-weight: 600; line-height: 1.3; }
.word-big.el { font-family: var(--font-el); }

/* ---------- inflection tables ---------- */
.infl-wrap { overflow-x: auto; }
.table.infl { max-width: 520px; }
.table.infl td { font-family: var(--font-el); font-size: 1rem; }
.table.infl th { text-transform: none; letter-spacing: 0; font-size: .82rem; }
.el-h { display: block; font-family: var(--font-el); font-weight: 400; color: var(--muted); font-size: .78rem; }
.conj-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: .5rem; }
.conj-card { background: var(--surface-2); border-radius: 10px; padding: .55rem .7rem; }
.conj-h { margin-bottom: .3rem; line-height: 1.25; font-size: .88rem; }
.infl-mini { border-collapse: collapse; width: 100%; font-size: .95rem; }
.infl-mini td { padding: .08rem 0; font-family: var(--font-el); }
.infl-mini td.pers { color: var(--muted); font-size: .78rem; width: 40%; }
.forms-box { margin-top: .8rem; text-align: left; }
.forms-box summary { cursor: pointer; font-weight: 600; color: var(--primary); }
.forms-box[open] summary { margin-bottom: .5rem; }
.infl-title { font-family: var(--font-el); font-weight: 600; margin-bottom: .35rem; }
.sources { font-size: .78rem; color: var(--muted); margin-top: 1rem; word-break: break-all; }

/* ---------- lesson reader ---------- */
.reader-bar {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(16px + env(safe-area-inset-bottom)); z-index: 40;
  display: flex; align-items: center; gap: .35rem; flex-wrap: wrap; justify-content: center;
  background: var(--surface); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 8px 30px rgba(0,0,0,.18);
  padding: .45rem .6rem; max-width: calc(100% - 24px);
}
@media (max-width: 720px) { .reader-bar { bottom: calc(68px + env(safe-area-inset-bottom)); } }
.reader-bar button { min-width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); cursor: pointer; font-size: 1.05rem; }
.reader-bar button.main { background: var(--primary); color: var(--primary-ink); border-color: transparent; min-width: 52px; }
.reader-bar select { height: 42px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--text); padding: 0 .4rem; }
.reader-pos { font-variant-numeric: tabular-nums; font-size: .85rem; color: var(--muted); min-width: 52px; text-align: center; }
.reader-warn { flex-basis: 100%; font-size: .75rem; color: var(--warn); text-align: center; }
.reader-warn:empty { display: none; }
.readable { cursor: pointer; border-radius: 8px; transition: background .2s; }
.reading { background: var(--primary-soft) !important; box-shadow: 0 0 0 4px var(--primary-soft); }
.lesson { padding-bottom: 90px; }

/* ---------- section quiz ---------- */
.quiz-prompt { font-size: 1.08rem; line-height: 1.5; }
.quiz-prompt [lang="el"] { font-family: var(--font-el); }
.quiz-big { font-size: 1.5rem; font-weight: 600; display: block; margin-bottom: .2rem; }
.quiz-prompt .blank { color: var(--primary); }
#quizBtn:disabled { opacity: .6; }

/* ---------- lessons ---------- */
.lesson { max-width: 760px; margin: 0 auto; }
.lesson-head .el-title { font-family: var(--font-el); color: var(--muted); font-size: 1.05rem; margin-top: -.2rem; }
.lesson-body { font-size: 1.02rem; line-height: 1.7; }
.lesson-body > * + * { margin-top: 1rem; }
.lesson-body p { margin: 0; }
.lesson-body ul { margin: 0; padding-left: 1.3rem; }
.lesson-body li + li { margin-top: .3rem; }
.lesson-body h3 { font-size: .8rem; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 0 0 .4rem; }
.terms { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: .4rem; }
.term { padding: .5rem .7rem; border-radius: 10px; background: var(--surface-2); line-height: 1.35; }
.term .el { font-family: var(--font-el); font-weight: 600; display: block; }
.term small { color: var(--muted); }
.timeline { list-style: none; padding: 0 0 0 1rem !important; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding-left: .6rem; }
.timeline li::before { content: ""; position: absolute; left: -1.43rem; top: .55em; width: 10px; height: 10px; border-radius: 50%; background: var(--primary); border: 2px solid var(--surface); }
.timeline .date { font-weight: 700; color: var(--primary); margin-right: .4rem; font-variant-numeric: tabular-nums; }
.tip { padding: .75rem .9rem; border-radius: 12px; background: var(--primary-soft); border-left: 4px solid var(--primary); }
.lesson-body .table td, .lesson-body .table th { font-size: .9rem; vertical-align: top; }
.tr-sub { display: block; color: var(--muted); font-size: .88em; line-height: 1.5; margin-top: .15rem; }
.lesson-body [lang="el"] { font-family: var(--font-el); }
.lesson-lang { gap: .5rem; }
.lesson-lang .seg { flex-wrap: wrap; }
.lesson-lang .seg button { padding: .4rem .7rem; font-size: .85rem; min-height: 36px; }
.lesson-body .speak { font-size: .9rem; vertical-align: baseline; }
.toc { display: grid; gap: .5rem; }
.toc a { display: grid; grid-template-columns: 38px 1fr auto; gap: .7rem; align-items: center; padding: .75rem .9rem; text-decoration: none; color: var(--text); }
.toc .ic { font-size: 1.4rem; text-align: center; }
.toc .s { display: block; color: var(--muted); font-size: .85rem; }
.lesson-nav { display: flex; gap: .5rem; flex-wrap: wrap; justify-content: space-between; margin-top: 1.4rem; }

.empty { text-align: center; padding: 2.2rem 1rem; }
.empty .big { font-size: 2.6rem; }
.fade-in { animation: fade .18s ease-out; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fade-in { animation: none; } .btn, #toast { transition: none; } }