/* Parsixklem · Hallmark: macrostructure=textbook (numbered chapters, main column + sticky gloss margin, language chips that re-write glosses and examples, level self-check), nav=header line + language chips, palette=paper/ink blue/highlighter yellow/red pencil, type=Lora + Public Sans */
:root{--bg:#F8F6F0;--bg2:#FFFFFF;--ink:#1B2A4A;--ink2:#4A556B;--ink3:#7E879A;--yel:#FFE066;--yel2:#F5CF2E;--red:#D64545;--line:rgba(27,42,74,.16);--serif:"Lora",Georgia,serif;--sans:"Public Sans","Segoe UI",sans-serif;--w:1160px;
--cmp-bg:#FFFFFF;--cmp-ink:#1B2A4A;--cmp-accent:#1B2A4A;--cmp-on-accent:#FFE066;--cmp-line:rgba(27,42,74,.22)}
*{box-sizing:border-box}html{scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.68;overflow-x:clip}
img{max-width:100%;height:auto;display:block}a{color:var(--ink)}h1,h2,h3{font-family:var(--serif);font-weight:700;line-height:1.2;margin:0 0 .5em}h2{font-size:clamp(1.6rem,3vw,2.3rem)}h3{font-size:1.2rem}
.px-in{max-width:var(--w);margin:0 auto;padding:0 24px}.px-visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.px-skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:#fff;padding:.5rem 1rem;z-index:2000}.px-skip:focus{left:8px}
.px-kicker{font-size:.76rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--red);margin:0 0 .6rem}.px-lead{font-size:1.08rem;color:var(--ink2)}.px-sec__lead{max-width:64ch;color:var(--ink2)}
.px-btn{display:inline-flex;align-items:center;min-height:48px;padding:0 1.4rem;background:var(--ink);color:#fff;text-decoration:none;font-weight:700;border:2px solid var(--ink);border-radius:4px}.px-btn:hover{background:#2C3F6B;border-color:#2C3F6B}.px-btn:focus-visible{outline:3px solid var(--yel2);outline-offset:3px}.px-btn--ghost{background:transparent;color:var(--ink)}.px-btn--ghost:hover{background:var(--yel)}
figure{margin:0}figure img{border-radius:4px}figcaption{font-size:.84rem;color:var(--ink3);margin-top:.5rem;font-style:italic}
mark,.px-hl{background:linear-gradient(transparent 50%,var(--yel) 50%)}
/* head */
.px-head{background:var(--bg2);border-bottom:2px solid var(--ink)}.px-head__row{display:flex;justify-content:space-between;align-items:center;gap:1.5rem;padding-top:.8rem;padding-bottom:.6rem;flex-wrap:wrap}
.px-head__brand{margin:0;font-family:var(--serif);font-size:1.45rem}.px-head__brand a{display:inline-grid;grid-template-columns:auto auto;gap:0 .6rem;align-items:center;text-decoration:none;color:var(--ink);font-weight:700}.px-head__brand svg{grid-row:1/3}.px-head__brand small{font-family:var(--sans);font-size:.7rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--ink3)}
.px-head__nav{display:flex;gap:.1rem;flex-wrap:wrap}.px-head__nav a{text-decoration:none;color:var(--ink2);font-weight:600;font-size:.86rem;padding:.35rem .6rem;border-bottom:3px solid transparent}.px-head__nav a:hover,.px-head__nav a.is-current{color:var(--ink);border-color:var(--yel2)}
.px-langs{display:flex;align-items:center;gap:.4rem;flex-wrap:wrap;padding-top:.5rem;padding-bottom:.8rem}.px-langs span{font-size:.82rem;font-weight:700;color:var(--ink3);margin-right:.3rem}.px-langs button{font:inherit;font-weight:700;font-size:.88rem;min-height:38px;padding:0 .9rem;border-radius:999px;border:2px solid var(--ink);background:transparent;color:var(--ink);cursor:pointer}.px-langs button[aria-pressed=true]{background:var(--ink);color:var(--yel)}.px-langs button:hover{background:var(--yel)}.px-langs button[aria-pressed=true]:hover{background:var(--ink)}.px-langs button:focus-visible{outline:3px solid var(--yel2);outline-offset:2px}
/* book */
.px-book{padding-top:2.5rem}
.px-hero{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:3rem;align-items:center;padding-bottom:3rem;border-bottom:1px solid var(--line)}.px-hero h2{font-size:clamp(1.9rem,3.6vw,2.8rem)}
.px-hero__sample{background:var(--bg2);border-left:4px solid var(--yel2);padding:.8rem 1rem;margin:1.2rem 0;font-size:.96rem;color:var(--ink2);display:grid;gap:.2rem}.px-hello{font-family:var(--serif);font-size:1.4rem;color:var(--ink);font-weight:700}.px-hero__cta{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.2rem 0 0}.px-hero__fig img{width:100%;aspect-ratio:4/3;object-fit:cover}
/* why */
.px-why{padding:2.5rem 0;border-bottom:1px solid var(--line)}.px-why__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:2rem}.px-why__grid h3{font-size:1.1rem;border-bottom:2px solid var(--yel2);display:inline-block;padding-bottom:.2rem}.px-why__grid p{margin:0;font-size:.96rem;color:var(--ink2)}
/* chapters with gloss margin */
.px-chap{display:grid;grid-template-columns:minmax(0,1fr) 220px;gap:3rem;padding:3rem 0;border-bottom:1px solid var(--line);scroll-margin-top:16px}.px-chap__main{min-width:0}
.px-gloss{position:sticky;top:20px;align-self:start;border-left:2px solid var(--yel2);padding-left:1rem;font-size:.9rem}.px-gloss__k{margin:0 0 .2rem;font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ink3);font-weight:700}.px-gloss__w{margin:0;font-family:var(--serif);font-style:italic;color:var(--ink2);line-height:1.5}
/* level check */
.px-check{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:1.5rem;margin-top:1.5rem;align-items:start}.px-check__list{display:grid;gap:.6rem}
.px-lvl{border:1px solid var(--line);background:var(--bg2);padding:.8rem 1rem .9rem;margin:0;border-radius:4px}.px-lvl legend{font-family:var(--serif);font-weight:700;font-size:1.1rem;padding:0 .4rem;background:var(--yel)}.px-lvl label{display:flex;gap:.7rem;align-items:flex-start;padding:.3rem 0;cursor:pointer;font-size:.95rem;color:var(--ink2);min-height:36px}.px-lvl input{width:20px;height:20px;flex:none;margin-top:.2rem;accent-color:var(--ink)}
.px-check__out{position:sticky;top:20px;background:var(--ink);color:#fff;padding:1.3rem 1.4rem;border-radius:4px}.px-check__lvl{margin:0 0 .6rem;font-size:1rem}.px-check__lvl b{display:block;font-family:var(--serif);font-size:2.2rem;color:var(--yel);line-height:1.1;margin-top:.2rem}.px-check__msg{margin:0;font-size:.92rem;color:#D4DAE8}
/* formats */
.px-formats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem;margin:1.5rem 0}.px-format{background:var(--bg2);border:1px solid var(--line);padding:1.1rem 1.2rem;border-radius:4px}.px-format h3{margin-bottom:.1rem}.px-format__dur{margin:0 0 .5rem;font-size:.8rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--red)}.px-format p:last-child{margin:0;font-size:.94rem;color:var(--ink2)}
.px-wide img{width:100%;aspect-ratio:16/8;object-fit:cover}
/* method */
.px-method{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem 2rem;margin:1.5rem 0}.px-method__item h3{font-size:1.1rem}.px-method__item p{margin:0;font-size:.95rem;color:var(--ink2)}.px-duo{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.2rem}.px-duo img{width:100%;aspect-ratio:4/3;object-fit:cover}
/* teacher */
.px-teacher{display:grid;grid-template-columns:260px minmax(0,1fr);gap:1.5rem;align-items:start;background:var(--bg2);border:1px solid var(--line);padding:1.3rem;border-radius:4px;margin:1.5rem 0}.px-teacher__fig img{width:100%;aspect-ratio:1/1;object-fit:cover}.px-teacher__txt{margin:0 0 .6rem;font-family:var(--serif);font-size:1.1rem}.px-teacher__exam{margin:0 0 .6rem;font-size:.95rem}.px-teacher__note{margin:0;font-size:.9rem;color:var(--ink3)}
/* prices */
.px-prices{width:100%;border-collapse:collapse;background:var(--bg2);border:1px solid var(--line);margin-top:1.2rem}.px-prices th,.px-prices td{padding:.65rem .9rem;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}.px-prices th{font-weight:600}.px-prices th small{display:block;font-weight:400;font-size:.82rem;color:var(--ink3)}.px-prices td{text-align:right;font-family:var(--serif);font-weight:700;white-space:nowrap;width:1%}
.px-example{margin:1.2rem 0 0;background:var(--yel);padding:.9rem 1.1rem;font-size:.95rem}
/* faq */
.px-faq{display:grid;gap:.4rem;margin:1.2rem 0 1.5rem}.px-faq__item{background:var(--bg2);border:1px solid var(--line);padding:0 1.1rem;border-radius:4px}.px-faq__item summary{cursor:pointer;padding:.85rem 0;font-weight:700;list-style:none;display:flex;justify-content:space-between;gap:1rem}.px-faq__item summary::-webkit-details-marker{display:none}.px-faq__item summary::after{content:"+";color:var(--red);font-family:var(--serif);font-size:1.3rem;line-height:1}.px-faq__item[open] summary::after{content:"−"}.px-faq__item p{margin:0 0 1rem;color:var(--ink2);font-size:.96rem}
/* abo */
.px-abo{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:3rem;align-items:center;padding:3rem 0 4rem}.px-abo__txt p{color:var(--ink2)}
.px-form{background:var(--ink);color:#fff;padding:1.6rem;min-width:0;border-radius:4px}.px-form__trap{position:absolute;left:-9999px}.px-form__row{display:grid;grid-template-columns:minmax(0,1fr);gap:.5rem}.px-form__label{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:#B9C2D6}
.px-form__input{min-width:0;width:100%;min-height:50px;border:2px solid #3E5080;background:#24355C;color:#fff;padding:0 1rem;font:inherit;border-radius:4px}.px-form__input::placeholder{color:#8E9BB8}.px-form__input:focus{outline:0;border-color:var(--yel)}.px-form__input[aria-invalid=true]{border-color:#FF8A80}
.px-form__btn{min-height:50px;border:0;background:var(--yel);color:var(--ink);font:inherit;font-weight:700;cursor:pointer;border-radius:4px;margin-top:.3rem}.px-form__btn:hover{background:var(--yel2)}.px-form__btn[disabled]{opacity:.6;cursor:wait}
.px-form__status{min-height:1.4em;font-size:.92rem;margin:.6rem 0 0}.px-form__status[data-state=error]{color:#FF8A80}.px-form__note{font-size:.84rem;color:#B9C2D6;margin:.4rem 0 0}.px-form a{color:var(--yel)}
/* foot */
.px-foot{background:var(--bg2);border-top:2px solid var(--ink);padding:3rem 0 2rem}.px-foot__in{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:3rem}.px-foot h2{font-size:1.25rem}.px-foot p{font-size:.92rem;color:var(--ink2)}
.px-foot__brand{font-family:var(--serif);font-weight:700;font-size:1.5rem!important;color:var(--ink)!important;margin:0 0 .4rem}.px-foot__legal{display:flex;flex-wrap:wrap;gap:.3rem 1rem;margin:1rem 0}.px-foot__legal a,.px-foot__legal button{color:var(--ink);font:inherit;font-size:.9rem;font-weight:600;background:none;border:0;padding:0;cursor:pointer;text-decoration:underline}.px-foot__small{font-size:.8rem!important;color:var(--ink3)!important}
.px-map{margin-top:1rem;aspect-ratio:16/10;background:var(--bg);position:relative;overflow:hidden;border:1px solid var(--line);border-radius:4px}.px-map iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.px-map [data-map-placeholder]{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;gap:.5rem;padding:1.2rem;font-size:.9rem}.px-map [data-map-placeholder] p{margin:0}.px-map button{align-self:flex-start;min-height:42px;padding:0 1rem;border:0;background:var(--ink);color:#fff;font:inherit;font-weight:700;cursor:pointer;border-radius:4px}.px-map small{color:var(--ink3);font-size:.76rem}
/* doc/done */
.px-doc{padding:3rem 0 4rem}.px-doc__in{max-width:820px}.px-doc h1{font-size:2.1rem}.px-doc h2{font-size:1.35rem;margin-top:2rem}.px-doc .lead{color:var(--ink2);font-size:1.06rem}.px-doc table{width:100%;border-collapse:collapse;font-size:.92rem;margin:1rem 0;background:var(--bg2)}.px-doc th,.px-doc td{border:1px solid var(--line);padding:.6rem .8rem;text-align:left;vertical-align:top}.px-doc th{background:var(--yel)}.px-doc .meta{color:var(--ink3);font-size:.88rem}.px-doc code{background:var(--yel);padding:.1em .4em}
.px-done{padding:4rem 0}.px-done__in{max-width:680px}.px-done h1{font-size:clamp(2rem,4.5vw,2.8rem)}
@media(max-width:1000px){.px-chap{grid-template-columns:minmax(0,1fr)}.px-gloss{position:static;border-left:0;border-top:2px solid var(--yel2);padding:0.6rem 0 0}.px-hero,.px-abo,.px-foot__in,.px-check,.px-teacher{grid-template-columns:minmax(0,1fr)}.px-check__out{position:static}.px-teacher__fig img{aspect-ratio:16/9}}
@media(max-width:700px){body{font-size:16.5px}.px-head__nav a{font-size:.8rem;padding:.3rem .45rem}.px-why__grid,.px-formats,.px-method,.px-duo{grid-template-columns:minmax(0,1fr)}.px-hero__fig img{aspect-ratio:16/10}.px-doc table{display:block;overflow-x:auto}.px-form{padding:1.2rem}.px-langs button{font-size:.82rem;padding:0 .7rem}}

/* consent manager */
.px-layer{position:fixed;inset:0;z-index:1300;background:rgba(0,0,0,.55);backdrop-filter:blur(3px);display:flex;align-items:flex-end;justify-content:center;padding:0}.px-layer[hidden]{display:none}
.px-layer__box{width:100%;max-height:92svh;overflow:auto;background:var(--cmp-bg,#fff);color:var(--cmp-ink,#111);border-radius:22px 22px 0 0;display:grid;grid-template-columns:1.1fr 1fr;gap:2rem;padding:2rem clamp(1.25rem,5vw,4rem);font-size:.93rem;line-height:1.55;box-shadow:0 -30px 60px -30px rgba(0,0,0,.6)}
.px-layer__kicker{margin:0 0 .4rem;font-size:.74rem;letter-spacing:.14em;text-transform:uppercase;opacity:.7}.px-layer h2{margin:0 0 .8rem;font-size:1.5rem;line-height:1.15}.px-layer__left p{margin:0 0 .8rem}.px-layer a{color:inherit;text-decoration:underline}.px-layer__meta{font-size:.76rem;opacity:.65}
.px-layer__cat{display:flex;justify-content:space-between;align-items:center;gap:1rem;padding:.9rem 0;border-top:1px solid var(--cmp-line,rgba(0,0,0,.15))}.px-layer__cat b{display:block;margin-bottom:.15rem}.px-layer__cat span{font-size:.82rem;opacity:.8}
.px-layer [role=switch]{flex:none;width:52px;height:30px;border-radius:15px;border:0;background:rgba(0,0,0,.25);position:relative;cursor:pointer;padding:0}.px-layer [role=switch] i{position:absolute;top:3px;left:3px;width:24px;height:24px;border-radius:50%;background:#fff;transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,.3)}.px-layer [role=switch][aria-checked="true"]{background:var(--cmp-accent,#111)}.px-layer [role=switch][aria-checked="true"] i{transform:translateX(22px)}.px-layer [role=switch]:disabled{opacity:.55;cursor:default}.px-layer [role=switch]:focus-visible{outline:2px solid var(--cmp-accent,#111);outline-offset:2px}
.px-layer__btns{display:grid;grid-template-columns:1fr 1fr;gap:.5rem;margin:1rem 0 .6rem;padding-top:1rem;border-top:1px solid var(--cmp-line,rgba(0,0,0,.15))}.px-layer__btns button{min-height:46px;border-radius:10px;border:2px solid var(--cmp-accent,#111);background:var(--cmp-accent,#111);color:var(--cmp-on-accent,#fff);font:inherit;font-weight:700;cursor:pointer;padding:0 .8rem}.px-layer__btns button:first-child{background:transparent;color:var(--cmp-ink,#111)}.px-layer__save{grid-column:1/-1;background:transparent!important;color:var(--cmp-ink,#111)!important;border-color:var(--cmp-line,rgba(0,0,0,.3))!important}
.px-layer__link{background:none;border:0;padding:0;margin-right:1rem;font:inherit;font-size:.84rem;text-decoration:underline;cursor:pointer;color:inherit}
.px-gear{position:fixed;right:1rem;bottom:1rem;z-index:1200;width:48px;height:48px;border-radius:50%;border:0;background:var(--cmp-accent,#111);color:var(--cmp-on-accent,#fff);display:grid;place-items:center;cursor:pointer;box-shadow:0 10px 24px -10px rgba(0,0,0,.6)}.px-gear[hidden]{display:none}
@media(max-width:760px){.px-layer__box{grid-template-columns:1fr;gap:1rem;padding:1.4rem 1.25rem}.px-layer h2{font-size:1.25rem}}