/* Elrendezés: tábla (sötét petrol, a logó színe) + füzetlap (hűvös papír, OneNote-rács). Balra zárt szöveg, egy kiemelt pillanat: a levezetés a nyitóképen. */
:root {
  --board: #0F2C2A;        /* tábla – pontosan a logó háttere */
  --board-2: #173F3C;      /* emelt felület a táblán */
  --board-line: rgba(113, 243, 235, .075);
  --mint: #5DCAC4;         /* logó menta */
  --pen: #71F3EB;          /* digitális toll a táblán */
  --chalk: #E3F2EF;        /* szöveg a táblán */
  --chalk-soft: #A9C9C4;
  --paper: #F1F5F4;        /* füzetlap */
  --paper-2: #E3ECE9;
  --grid: #D5E2DF;
  --ink: #102624;          /* tinta */
  --ink-soft: #435B58;
  --teal: #19645F;         /* link a papíron */
  --hl: #F3DF4A;           /* szövegkiemelő: mindig "ez a lényeg" */

  --f-ui: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --f-math: "STIX Two Math", "STIX Two Text", "Cambria Math", "Latin Modern Math", "Times New Roman", serif;
  --f-pen: "Kalam", "Segoe Print", "Comic Sans MS", cursive;

  --s-1: 0.875rem; --s0: 1.0625rem; --s1: 1.3rem; --s2: 1.65rem; --s3: 2.1rem; --s4: 2.75rem; --s5: 3.6rem;
  --wrap: 1180px;
  --gut: max(16px, env(safe-area-inset-left, 0px));
  --gut-r: max(16px, env(safe-area-inset-right, 0px));
  color-scheme: light;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 24px; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--f-ui); font-size: var(--s0); line-height: 1.6;
  font-variation-settings: "wdth" 100;
}
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--board); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--teal); text-underline-offset: .18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--hl); outline-offset: 2px; border-radius: 2px; }
h1, h2, h3 { font-weight: 760; line-height: 1.08; text-wrap: balance; margin: 0; font-variation-settings: "wdth" 78, "opsz" 72; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.4rem, 6.2vw, var(--s5)); }
h2 { font-size: clamp(1.8rem, 4vw, var(--s4)); }
h3 { font-size: var(--s1); font-variation-settings: "wdth" 85, "opsz" 24; line-height: 1.2; }
p { margin: 0; }
math { font-family: var(--f-math); }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-left: var(--gut); padding-right: var(--gut-r); }
.band { padding-block: clamp(48px, 8vw, 96px); }
.band--board {
  background-color: var(--board); color: var(--chalk);
  background-image: linear-gradient(var(--board-line) 1px, transparent 1px), linear-gradient(90deg, var(--board-line) 1px, transparent 1px);
  background-size: 28px 28px;
}
.band--board a { color: var(--pen); }
.band--paper2 { background: var(--paper-2); }
.measure { max-width: 66ch; }
.stack { display: grid; gap: 1.1em; }
.lead { font-size: var(--s1); line-height: 1.5; color: var(--ink-soft); }
.band--board .lead { color: var(--chalk-soft); }
.pen { font-family: var(--f-pen); color: var(--pen); font-weight: 400; }
mark { background: linear-gradient(transparent 12%, var(--hl) 12%, var(--hl) 88%, transparent 88%); color: var(--ink); padding-inline: .15em; }

/* ---------- fejléc ---------- */
.top { background: var(--board); color: var(--chalk); position: relative; z-index: 5; }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-block: 12px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--chalk); text-decoration: none; font-weight: 650; font-size: 1.02rem; line-height: 1.2; }
.brand img { width: 44px; height: 51px; object-fit: cover; border-radius: 3px; }
.brand:hover { color: #fff; }
.nav { display: flex; gap: 2px; flex-wrap: wrap; justify-content: flex-end; }
.nav a { color: var(--chalk); text-decoration: none; padding: 8px 11px; border-radius: 4px; font-size: .97rem; }
.nav a:hover { background: var(--board-2); }
.nav a[aria-current="page"] { color: var(--ink); background: var(--mint); }
.menu { display: none; }
.menu summary { list-style: none; cursor: pointer; padding: 8px 12px; border: 1px solid var(--mint); border-radius: 4px; color: var(--chalk); font-weight: 600; }
.menu summary::-webkit-details-marker { display: none; }
@media (max-width: 900px) {
  .nav--wide { display: none; }
  .menu { display: block; }
  .menu[open] .nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--board); flex-direction: column; padding: 8px var(--gut-r) 16px var(--gut); border-top: 1px solid var(--board-2); box-shadow: 0 18px 30px rgba(0,0,0,.25); }
  .menu[open] .nav a { padding: 12px 8px; font-size: 1.1rem; }
}

/* ---------- nyitókép: levezetés ---------- */
.hero { padding-block: clamp(36px, 6vw, 72px) clamp(48px, 7vw, 88px); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
.hero-banner { width: min(100%, 470px); margin-bottom: 26px; margin-left: -6px; mix-blend-mode: lighten; }
.hero h1 { font-size: clamp(2.6rem, 6.4vw, 4.4rem); color: #fff; }
.hero h1 span { display: block; color: var(--mint); }
.hero .lead { margin-top: 20px; max-width: 34ch; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 20px; border-radius: 6px; font-weight: 650; text-decoration: none; font-size: 1.02rem; border: 2px solid transparent; }
.btn--hl { background: var(--hl); color: var(--ink) !important; }
.btn--hl:hover { background: #fff07a; }
.btn--line { border-color: var(--mint); color: var(--chalk) !important; }
.btn--line:hover { background: var(--board-2); }
.btn--ink { background: var(--ink); color: #fff !important; }
.btn--ink:hover { background: var(--teal); }
.score { display: flex; align-items: baseline; gap: 10px; margin-top: 26px; color: var(--chalk-soft); font-size: .98rem; }
.score b { font-size: 1.5rem; color: #fff; font-variant-numeric: tabular-nums; }

.deriv { position: relative; background: var(--board-2); border: 1px solid rgba(93,202,196,.28); border-radius: 10px; padding: clamp(18px, 3vw, 30px) clamp(16px, 3vw, 30px) 18px; box-shadow: 0 30px 60px -30px rgba(0,0,0,.6); }
.deriv-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; color: var(--chalk-soft); font-size: .92rem; margin-bottom: 10px; }
.replay { background: none; border: 0; color: var(--pen); font-family: var(--f-pen); font-size: 1.05rem; cursor: pointer; padding: 4px 6px; }
.steps { display: grid; gap: 4px; }
.step { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 12.5rem); align-items: center; gap: 14px; padding-block: 8px; border-top: 1px dashed rgba(93,202,196,.22); }
.step:first-child { border-top: 0; }
.step math { font-size: 1.42rem; color: #fff; overflow-x: auto; max-width: 100%; }
.step .pen { font-size: 1.04rem; line-height: 1.25; }
.cancel { background: linear-gradient(to top right, transparent calc(50% - 1.5px), var(--hl) calc(50% - 1.5px), var(--hl) calc(50% + 1.5px), transparent calc(50% + 1.5px)); }
.answer { position: relative; padding: 2px 6px; background: linear-gradient(var(--hl), var(--hl)) no-repeat 0 50% / 100% 86%; color: var(--ink); }
.answer mn, .answer mi, .answer mo { color: var(--ink); }
.anim .step { animation: ink .6s ease-out both; }
.anim .step:nth-child(2) { animation-delay: .9s; }
.anim .step:nth-child(3) { animation-delay: 1.8s; }
.anim .step:nth-child(4) { animation-delay: 2.7s; }
.anim .answer { animation: swipe .55s ease-out 3.4s both; }
@keyframes ink { from { opacity: .12; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes swipe { from { background-size: 0% 86%; } to { background-size: 100% 86%; } }
@media (prefers-reduced-motion: reduce) { .anim .step, .anim .answer { animation: none; } }
.deriv-foot { margin-top: 12px; font-size: .88rem; color: var(--chalk-soft); }
@media (max-width: 880px) {
  .hero .wrap { grid-template-columns: minmax(0, 1fr); }
  .step { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .step math { font-size: 1.25rem; }
}

/* ---------- szintek tengelye ---------- */
.sec-head { display: grid; gap: 14px; margin-bottom: clamp(28px, 4vw, 44px); }
.axis { list-style: none; margin: 0; padding: 0; position: relative; }
.axis::before { content: ""; position: absolute; left: 11rem; top: 6px; bottom: -26px; width: 2px; background: var(--ink); }
.axis::after { content: ""; position: absolute; left: calc(11rem - 6px); bottom: -34px; border: 7px solid transparent; border-top: 11px solid var(--ink); border-bottom: 0; }
.axis-end { position: relative; margin: 30px 0 0 calc(11rem + 22px); font-family: var(--f-pen); color: var(--ink-soft); }
.axis li { display: grid; grid-template-columns: 11rem minmax(0, 1fr); gap: 0; position: relative; }
.axis .lvl { padding: 22px 26px 22px 0; text-align: right; font-weight: 600; color: var(--ink-soft); font-size: .95rem; font-variant-numeric: tabular-nums; }
.axis .row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 28px; align-items: start; padding: 20px 0 22px 34px; border-bottom: 1px solid var(--grid); position: relative; }
.axis .row::before { content: ""; position: absolute; left: -6px; top: 30px; width: 14px; height: 14px; border-radius: 50%; background: var(--paper); border: 2px solid var(--ink); }
.axis li:hover .row::before { background: var(--hl); }
.axis h3 { font-size: clamp(1.25rem, 2.4vw, 1.6rem); }
.axis h3 a { color: var(--ink); text-decoration: none; }
.axis h3 a:hover { text-decoration: underline; text-decoration-color: var(--hl); text-decoration-thickness: 5px; text-underline-offset: 2px; }
.axis p { color: var(--ink-soft); grid-column: 1; max-width: 62ch; }
.axis .more { grid-column: 2; grid-row: 1 / span 2; align-self: center; font-weight: 600; white-space: nowrap; }
@media (max-width: 720px) {
  .axis::before { left: 6px; } .axis::after { left: 0; } .axis-end { margin-left: 30px; }
  .axis li { grid-template-columns: minmax(0, 1fr); }
  .axis .lvl { text-align: left; padding: 18px 0 0 30px; }
  .axis .row { padding: 4px 0 20px 30px; grid-template-columns: minmax(0, 1fr); }
  .axis .row::before { left: 0; top: -17px; }
  .axis .more { grid-column: 1; grid-row: auto; }
}

/* ---------- óra menete ---------- */
.how { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(20px, 3vw, 36px); counter-reset: s; list-style: none; padding: 0; margin: 0; }
.how li { counter-increment: s; display: grid; gap: 12px; align-content: start; }
.how li::before { content: counter(s) "."; font-family: var(--f-pen); font-size: 2.4rem; line-height: 1; color: var(--teal); }
.how figure { margin: 0; }
.how img { border-radius: 6px; border: 1px solid var(--grid); aspect-ratio: 16 / 10; object-fit: cover; width: 100%; background: #fff; }
.how p { color: var(--ink-soft); }
@media (max-width: 820px) { .how { grid-template-columns: minmax(0, 1fr); } }

/* ---------- idézet + portré ---------- */
.about-strip { display: grid; grid-template-columns: minmax(0, 15rem) minmax(0, 1fr); gap: clamp(24px, 4vw, 56px); align-items: start; }
.portrait { border-radius: 8px; width: 100%; max-width: 15rem; aspect-ratio: 1; object-fit: cover; }
blockquote { margin: 0; font-size: clamp(1.25rem, 2.3vw, 1.55rem); line-height: 1.45; font-variation-settings: "wdth" 92; }
blockquote p + p { margin-top: .7em; }
.sign { margin-top: 18px; font-family: var(--f-pen); font-size: 1.3rem; color: var(--teal); }
@media (max-width: 680px) { .about-strip { grid-template-columns: minmax(0, 1fr); } .portrait { max-width: 11rem; } }

/* ---------- értékelések ---------- */
.ratings { display: grid; gap: 26px; max-width: 900px; }
.r-sum { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--grid); }
.r-sum > div { display: grid; gap: 2px; padding: 16px 18px 16px 0; }
.r-sum > div + div { padding-left: 18px; border-left: 1px solid var(--grid); }
.r-sum b { font-size: clamp(2.2rem, 5vw, 3.2rem); line-height: 1; font-weight: 760; font-variation-settings: "wdth" 78, "opsz" 72; font-variant-numeric: tabular-nums; }
.r-sum > div > span { color: var(--ink-soft); font-size: .95rem; }
.rate-rows { display: grid; gap: 12px; }
.rate { display: grid; grid-template-columns: minmax(0, 13rem) 3.2rem minmax(0, 1fr); gap: 14px; align-items: center; }
.rate-name { font-weight: 600; }
.rate-avg { font-weight: 700; font-size: 1.15rem; font-variant-numeric: tabular-nums; text-align: right; }
.dist { display: flex; height: 24px; border-radius: 3px; overflow: hidden; background: var(--paper); }
.dist i { display: grid; place-items: center; font-style: normal; font-size: .78rem; font-weight: 700; font-variant-numeric: tabular-nums; min-width: 3px; }
.d5 { background: var(--ink); color: #fff; }
.d4 { background: var(--teal); color: #fff; }
.d3 { background: var(--mint); color: var(--ink); }
.d2 { background: #A9C9C4; color: var(--ink); }
.d1 { background: #D5E2DF; color: var(--ink); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: .88rem; color: var(--ink-soft); margin: 0; }
.legend span { display: inline-flex; align-items: center; gap: 6px; }
.legend i { width: 14px; height: 14px; border-radius: 2px; display: inline-block; }
.legend-note { flex-basis: 100%; }
@media (max-width: 620px) {
  .rate { grid-template-columns: minmax(0, 1fr) auto; gap: 6px 12px; }
  .dist { grid-column: 1 / -1; }
  .r-sum > div { padding-right: 8px; } .r-sum > div + div { padding-left: 10px; }
}
.quotes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 30px; }
.quotes--all { margin-top: 0; }
.q { margin: 0; background: #fff; border: 1px solid var(--grid); border-radius: 8px; padding: 22px 24px 18px; display: grid; gap: 12px; align-content: start; position: relative; font-size: 1.08rem; line-height: 1.55; }
.band--paper2 .q { border-color: #CFDDDA; }
.q::before { content: "„"; position: absolute; top: -4px; left: 20px; font-size: 3.4rem; line-height: 1; color: var(--hl); font-family: var(--f-math); }
.q p { padding-top: 22px; }
.q footer { font-size: .88rem; color: var(--ink-soft); }
.quotes-empty { color: var(--ink-soft); }
@media (max-width: 760px) { .quotes { grid-template-columns: minmax(0, 1fr); } }

/* értékelő űrlap */
.rate-form { gap: 22px; }
.scale { border: 0; margin: 0; padding: 0 0 18px; border-bottom: 1px solid var(--grid); display: grid; gap: 10px; min-width: 0; }
.scale legend { display: grid; gap: 2px; padding: 0; margin-bottom: 10px; }
.scale legend span { color: var(--ink-soft); font-size: .95rem; }
.opts { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.opts--2 { grid-template-columns: repeat(2, minmax(0, 8rem)); }
.opt { position: relative; }
.opt input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.opt span { display: grid; place-items: center; height: 48px; border: 1.5px solid #B9CCC8; border-radius: 6px; font-weight: 700; font-size: 1.15rem; font-variant-numeric: tabular-nums; background: var(--paper); transition: background .12s, border-color .12s; }
.opt:hover span { border-color: var(--ink); }
.opt input:checked + span { background: var(--hl); border-color: var(--ink); }
.opt input:focus-visible + span { outline: 3px solid var(--teal); outline-offset: 2px; }
.ends { display: flex; justify-content: space-between; gap: 12px; font-size: .85rem; color: var(--ink-soft); }
.ends span:last-child { text-align: right; }
.scale.err legend b { color: #A3271F; }
.scale.err .opt span { border-color: #C9776F; }
.rate-done { display: grid; gap: 10px; padding: 26px; background: #fff; border: 1px solid var(--grid); border-radius: 10px; }
.rate-done h3 { font-size: 1.5rem; }

/* ---------- kapcsolat sáv ---------- */
.contact-strip .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 28px; align-items: end; }
.contact-strip h2 { color: #fff; }
.big-phone { font-size: clamp(1.9rem, 5vw, 3.1rem); font-weight: 760; font-variation-settings: "wdth" 80; color: var(--hl) !important; text-decoration: none; letter-spacing: .01em; font-variant-numeric: tabular-nums; }
.contact-lines { display: grid; gap: 6px; margin-top: 16px; }
@media (max-width: 760px) { .contact-strip .wrap { grid-template-columns: minmax(0, 1fr); } }

/* ---------- aloldal fejléc ---------- */
.page-head { padding-block: clamp(36px, 6vw, 64px); }
.page-head .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 48px; align-items: end; }
.page-head h1 { color: #fff; }
.page-head .lead { margin-top: 14px; max-width: 52ch; }
.crumb { font-size: .92rem; color: var(--chalk-soft); margin-bottom: 14px; }
.crumb a { color: var(--chalk-soft); }
.formula { color: var(--pen); font-size: clamp(1.4rem, 3vw, 2rem); opacity: .95; text-align: right; }
.formula math { color: var(--pen); }
.formula figcaption { font-family: var(--f-pen); font-size: 1rem; color: var(--chalk-soft); margin-top: 4px; }
.formula { margin: 0; }
@media (max-width: 760px) { .page-head .wrap { grid-template-columns: minmax(0, 1fr); } .formula { text-align: left; } }

/* ---------- tartalom ---------- */
.content { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); gap: clamp(28px, 5vw, 72px); align-items: start; }
.content > * { min-width: 0; }
.content aside { position: sticky; top: 24px; display: grid; gap: 18px; }
@media (max-width: 900px) { .content { grid-template-columns: minmax(0, 1fr); } .content aside { position: static; } }
.prose { display: grid; gap: 1em; max-width: 68ch; }
.prose h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin-top: .8em; }
.prose h3 { margin-top: .4em; }
.prose ul { margin: 0; padding-left: 1.2em; display: grid; gap: .35em; }
.course { display: grid; gap: .7em; padding-top: 26px; border-top: 2px solid var(--ink); }
.course + .course { margin-top: 18px; }
.course .to-sample { font-weight: 600; }
.groups { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 36px; }
.groups h3 { font-size: 1.05rem; font-variation-settings: "wdth" 95; margin-bottom: 8px; color: var(--teal); }
.groups ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.groups li { padding-left: 16px; position: relative; }
.groups li::before { content: ""; position: absolute; left: 0; top: .72em; width: 7px; height: 2px; background: var(--ink); }
@media (max-width: 640px) { .groups { grid-template-columns: minmax(0, 1fr); } }
.chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; margin: 0; }
.chips li, .chips a { display: inline-block; padding: 5px 12px; border: 1px solid var(--ink); border-radius: 999px; font-size: .92rem; text-decoration: none; color: var(--ink); background: transparent; }
.chips a:hover { background: var(--hl); }
.figure { margin: 0; display: grid; gap: 8px; }
.figure img { border-radius: 6px; border: 1px solid var(--grid); background: #fff; }
.figure figcaption { font-size: .88rem; color: var(--ink-soft); }
.side-card { background: #fff; border: 1px solid var(--grid); border-radius: 8px; padding: 20px; display: grid; gap: 12px; }
.side-card h2 { font-size: 1.3rem; }
.side-card .btn { justify-content: center; }
.logos { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.logos img { aspect-ratio: 16 / 10; object-fit: contain; background: #fff; border: 1px solid var(--grid); border-radius: 6px; padding: 10px; width: 100%; }

/* ---------- mintaanyag ---------- */
.subj-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.sample { padding-top: 30px; margin-top: 30px; border-top: 2px solid var(--ink); display: grid; gap: 16px; }
.sample:first-of-type { border-top: 0; margin-top: 0; }
.sample-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 20px; }
.sample-head a { font-weight: 600; font-size: .95rem; }
.thumbs { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 14px; }
.thumb { all: unset; cursor: zoom-in; display: grid; gap: 8px; }
.thumb span.frame { display: grid; place-items: center; aspect-ratio: 4 / 3; background: #fff; border: 1px solid var(--grid); border-radius: 6px; padding: 10px; overflow: hidden;
  background-image: linear-gradient(var(--paper-2) 1px, transparent 1px), linear-gradient(90deg, var(--paper-2) 1px, transparent 1px); background-size: 16px 16px; }
.thumb img { max-height: 100%; width: auto; object-fit: contain; box-shadow: 0 1px 3px rgba(16,38,36,.18); }
.thumb:hover span.frame, .thumb:focus-visible span.frame { border-color: var(--ink); }
.thumb:focus-visible { outline: 3px solid var(--hl); outline-offset: 3px; border-radius: 6px; }
.thumb small { color: var(--ink-soft); font-size: .85rem; }
dialog.lb { border: 0; padding: 0; background: transparent; max-width: min(96vw, 1200px); width: 100%; }
dialog.lb::backdrop { background: rgba(10, 30, 28, .88); }
.lb-inner { background: #fff; border-radius: 8px; padding: 14px; display: grid; gap: 10px; }
.lb-inner img { margin-inline: auto; max-height: 76vh; width: auto; }
.lb-bar { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; }
.lb-bar button { font: inherit; font-weight: 600; background: var(--ink); color: #fff; border: 0; border-radius: 5px; padding: 8px 14px; cursor: pointer; }
.lb-bar button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.lb-cap { color: var(--ink-soft); font-size: .95rem; }

/* ---------- letöltés ---------- */
.dl { list-style: none; padding: 0; margin: 0; display: grid; gap: 0; max-width: 820px; }
.dl li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 6px 24px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--grid); }
.dl li:first-child { border-top: 2px solid var(--ink); }
.dl small { color: var(--ink-soft); }
@media (max-width: 600px) { .dl li { grid-template-columns: minmax(0, 1fr); } }

/* ---------- űrlap ---------- */
.form { display: grid; gap: 16px; background: #fff; border: 1px solid var(--grid); border-radius: 10px; padding: clamp(18px, 3vw, 30px); }
.field { display: grid; gap: 6px; }
.field label { font-weight: 600; }
.field input, .field textarea, .field select { font: inherit; color: var(--ink); background: var(--paper); border: 1px solid #B9CCC8; border-radius: 6px; padding: 11px 12px; width: 100%; }
.field input:focus, .field textarea:focus, .field select:focus { outline: 3px solid var(--hl); outline-offset: 0; border-color: var(--ink); }
.field textarea { min-height: 150px; resize: vertical; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 560px) { .two { grid-template-columns: minmax(0, 1fr); } }
.form-note { font-size: .88rem; color: var(--ink-soft); }
.form-status { font-weight: 600; }
.form-status[data-state="ok"] { color: var(--teal); }
.form-status[data-state="err"] { color: #A3271F; }
.form button { justify-self: start; font: inherit; cursor: pointer; }
.contact-list { display: grid; gap: 18px; }
.contact-list dt { font-size: .9rem; color: var(--ink-soft); }
.contact-list dd { margin: 2px 0 0; font-size: 1.25rem; font-weight: 650; overflow-wrap: anywhere; }
.copy { font: inherit; font-size: .85rem; margin-left: 8px; background: none; border: 1px solid var(--grid); border-radius: 4px; padding: 2px 8px; cursor: pointer; color: var(--ink-soft); vertical-align: middle; }

/* ---------- beágyazások ---------- */
.embed { width: 100%; border: 1px solid var(--grid); border-radius: 8px; background: #fff; display: block; }
.embed-ph { display: grid; place-items: center; text-align: center; gap: 8px; padding: 40px 20px; border: 2px dashed var(--grid); border-radius: 8px; color: var(--ink-soft); }

/* ---------- lábléc ---------- */
.foot { padding-block: 40px 32px; }
.foot .wrap { display: grid; grid-template-columns: minmax(0, 20rem) minmax(0, 1fr); gap: 28px; align-items: start; }
.foot .brand img { width: 38px; height: 44px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 4px 18px; justify-content: flex-end; }
.foot nav a { color: var(--chalk-soft); text-decoration: none; }
.foot nav a:hover { color: #fff; }
.foot small { grid-column: 1 / -1; color: var(--chalk-soft); padding-top: 18px; border-top: 1px solid var(--board-2); }
@media (max-width: 700px) { .foot .wrap { grid-template-columns: minmax(0, 1fr); } .foot nav { justify-content: flex-start; } }

/* javítások */
.chips li:has(> a) { border: 0; padding: 0; }
.step math, .formula math { text-align: left; }
.formula math { margin-left: auto; }
@media (max-width: 760px) { .formula math { margin-left: 0; } }

/* ---------- saját illusztrációk ---------- */
.illus { margin: 0; display: grid; gap: 8px; }
.illus-svg { width: 100%; height: auto; display: block; border-radius: 10px; }
.illus figcaption { font-size: .88rem; color: var(--ink-soft); }
.il-bg { fill: var(--board); }
.il-grid { stroke: var(--board-line); stroke-width: 1; }
.il-axis { stroke: var(--chalk-soft); stroke-width: 1.6; fill: none; }
.il-axis-head { fill: var(--chalk-soft); }
.il-t { fill: var(--chalk); font-family: var(--f-ui); font-size: 17px; }
.il-math { font-family: var(--f-math); font-style: italic; font-size: 19px; }
.il-sm { font-size: 15px; }
.il-xs { font-size: 13px; }
.il-ink { fill: var(--ink); }
.il-hl-t { fill: var(--hl); }
.il-pen { fill: var(--pen); font-family: var(--f-pen); font-size: 18px; }
.il-pen.il-ink { fill: var(--ink); }
.il-curve { stroke: var(--mint); stroke-width: 3.2; fill: none; stroke-linecap: round; }
.il-curve-2 { stroke: var(--pen); stroke-width: 3.2; fill: none; stroke-dasharray: 1 0; }
.il-curve-soft { stroke: var(--chalk-soft); stroke-width: 2; fill: none; stroke-dasharray: 7 6; }
.il-tangent { stroke: var(--hl); stroke-width: 2.4; fill: none; }
.il-area { fill: var(--mint); opacity: .85; }
.il-guide { stroke: var(--chalk-soft); stroke-width: 1.4; stroke-dasharray: 4 5; }
.il-guide-hl { stroke: var(--hl); stroke-width: 2; stroke-dasharray: 4 5; }
.il-dot { fill: var(--board); stroke: var(--mint); stroke-width: 3; }
.il-dot-hl { fill: var(--hl); stroke: var(--board); stroke-width: 2.5; }
.il-pt { fill: var(--mint); opacity: .9; }
.il-fit { stroke: var(--hl); stroke-width: 3; fill: none; }
.il-label-bg { fill: var(--hl); }
.il-block { fill: var(--board-2); stroke: rgba(93,202,196,.45); stroke-width: 1.2; }
.il-block-hl { fill: var(--hl); }
.il-frac { fill: var(--chalk); }
.il-frac-ink { fill: var(--ink); }
.il-frac-line { stroke: var(--chalk); stroke-width: 1.4; }
.il-frac-ink-line { stroke: var(--ink); stroke-width: 1.4; }
.il-hl-line { stroke: var(--hl); stroke-width: 1.6; }
.il-tick-hl { stroke: var(--hl); stroke-width: 3; }
.il-win { fill: var(--board-2); stroke: rgba(93,202,196,.35); }
.il-winbar { fill: #0B2221; }
.il-wdot { fill: var(--chalk-soft); opacity: .6; }
.il-board-paper { fill: #FBFDFC; }
.il-ink-pen { fill: var(--ink); font-family: var(--f-pen); font-size: 26px; }
.il-teal-pen { fill: var(--teal); font-family: var(--f-pen); font-size: 18px; }
.il-arrow { stroke: var(--teal); stroke-width: 2; fill: none; }
.il-hl-swipe { fill: var(--hl); }
.il-penbody { fill: var(--ink); }
.il-pentip { fill: var(--mint); }
.il-tile { fill: #0B2221; stroke: rgba(93,202,196,.3); }
.il-avatar { fill: var(--mint); opacity: .55; }
.il-dock { fill: #0B2221; stroke: rgba(93,202,196,.3); }
.il-btn { fill: var(--board-2); stroke: var(--chalk-soft); stroke-width: 1.2; }
.il-btn-red { fill: #C8463C; }
.prose ul.chips { display: flex; padding-left: 0; }
@media (min-width: 901px) { .content--form { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); } }
.btn--line-ink { border-color: var(--ink); color: var(--ink) !important; }
.btn--line-ink:hover { background: var(--hl); }