:root {
    --line-strong: #8f8575;
    --accent-fill: var(--rust);
    --accent-hover: #77271e;
    --on-accent: #fffbf2;
    --accent-soft: #f4e2d8;
    --green: #365344;
    --green-soft: #e3e9df;
    --sheet-shadow: #26312a1b;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --paper: #222a24;
    --sheet: #2e3830;
    --ink: #f4ebde;
    --muted: #cdcabc;
    --rust: #f5b4a1;
    --focus: #f5b4a1;
    --line: #586155;
    --line-strong: #9c9c8d;
    --accent-fill: #efad98;
    --accent-hover: #ffc5b2;
    --on-accent: #3d221d;
    --accent-soft: #49342e;
    --green: #c1d6c5;
    --green-soft: #39493d;
    --sheet-shadow: #171c1880;
}

.site-body { display: flex; flex-direction: column; min-height: 100vh; min-height: 100dvh; }
.site-body .site-footer { margin-top: auto; }
.site-content { margin-block: clamp(2rem, 6vw, 4.5rem); }
.site-content h1 {
    font-size: clamp(2.3rem, 5.5vw, 3.7rem);
    line-height: 1.04;
    letter-spacing: -.055em;
    overflow-wrap: anywhere;
    text-wrap: balance;
}
:where(.site-content) a { color: var(--rust); }
.site-content a:hover { text-decoration-thickness: 2px; }
.site-content p + p { margin-top: .85rem; }
.site-content .sub { margin: .65rem 0 1.35rem; color: var(--muted); }
.site-content .sub strong { color: var(--ink); }
.site-content code { overflow-wrap: anywhere; }

.form-page {
    max-width: 32rem;
    padding: clamp(1.3rem, 5vw, 2.65rem);
    border: 1px solid var(--line);
    background: var(--sheet);
    box-shadow: .4rem .4rem 0 var(--sheet-shadow);
}
.form-page p { overflow-wrap: anywhere; }
.form-page > p + .btn, .form-page > p + .alert { margin-top: 1rem; }
.form-page > .stack { margin-top: 1.1rem; }
.form-page .foot {
    margin: 1.25rem 0 0;
    padding-top: .9rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: .88rem;
}
.form-page .offer-price strong {
    margin-right: .3rem;
    color: var(--rust);
    font: 400 2rem/1 var(--serif);
    letter-spacing: -.04em;
}

.field { margin-bottom: 1rem; }
.field label { display: block; margin-bottom: .33rem; font-size: .88rem; font-weight: 700; }
.field input {
    width: 100%;
    min-height: 2.85rem;
    padding: .66rem .75rem;
    border: 1px solid var(--line-strong);
    border-radius: 0;
    background: var(--paper);
    color: var(--ink);
    font: inherit;
}
.field input:focus-visible { outline-offset: 2px; }
.field-error { display: block; margin: -.55rem 0 .9rem; color: var(--rust); font-size: .86rem; font-weight: 700; }
.field > .field-error { margin: .35rem 0 0; }
.field-error:empty, .validation-summary-valid { display: none; }
.field-help { margin: .25rem 0 1rem; color: var(--muted); font-size: .86rem; }

.pw { position: relative; }
.pw input { padding-right: 4.5rem; }
.pw-eye {
    position: absolute;
    top: 50%;
    right: .5rem;
    min-height: 2rem;
    padding: .2rem .5rem;
    transform: translateY(-50%);
    border: 0;
    background: transparent;
    color: var(--rust);
    cursor: pointer;
    font-size: .82rem;
    font-weight: 700;
}
.pw-eye:hover { text-decoration: underline; }
.pw-eye:focus-visible { outline-offset: 1px; }

.row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .55rem 1rem; margin: 0 0 1.1rem; font-size: .88rem; }
.check { display: flex; align-items: baseline; gap: .55rem; cursor: pointer; }
.check input { flex: none; width: 1.05rem; height: 1.05rem; margin: 0; accent-color: var(--accent-fill); }
.row .check { align-items: center; }

.btn {
    display: block;
    width: 100%;
    padding: .82rem .9rem;
    border: 1px solid var(--accent-fill);
    background: var(--accent-fill);
    color: var(--on-accent);
    font: 700 .94rem/1.35 var(--sans);
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: background .18s ease, border-color .18s ease;
}
.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn:disabled { opacity: .68; cursor: default; }
.btn-quiet { background: transparent; border-color: var(--line-strong); color: var(--ink); }
.btn-quiet:hover { background: var(--paper); border-color: var(--rust); color: var(--rust); }
.stack > * + * { margin-top: .7rem; }

.alert { margin: 1rem 0; padding: .75rem .85rem; border: 1px solid var(--line); font-size: .88rem; }
.alert ul { margin: 0; padding-left: 1.2rem; }
.alert-error { background: var(--accent-soft); color: var(--rust); border-color: var(--rust); }
.alert-ok, .alert-info { background: var(--green-soft); color: var(--green); }

.legal-page { max-width: 45rem; }
.legal-heading { border-bottom: 1px solid var(--line); padding-bottom: clamp(1rem, 3vw, 1.5rem); }
.document-version { margin-top: .75rem; color: var(--rust); font-size: .75rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
.legal-copy { margin-top: 1.4rem; line-height: 1.7; }
.legal-copy h2 { margin: 2rem 0 .7rem; font-size: clamp(1.4rem, 3.2vw, 1.9rem); line-height: 1.15; letter-spacing: -.025em; }
.legal-copy ul { padding-inline-start: 1.35rem; }
.legal-copy li + li { margin-top: .6rem; }
.legal-copy li::marker { color: var(--rust); }
.legal-copy dt { margin: .75rem 0 .15rem; }
.legal-copy dd { margin-inline-start: 0; color: var(--muted); }

.courses-page { max-width: 62rem; }
.active-course-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: .85rem 1.5rem;
    margin-bottom: 1.65rem;
    padding: 1rem clamp(.9rem, 3vw, 1.4rem);
    border: 1px solid var(--line);
    background: var(--green-soft);
}
.acb-info { display: grid; gap: .24rem; }
.acb-label, .course-level { color: var(--rust); font-size: .73rem; font-weight: 700; text-transform: uppercase; letter-spacing: .085em; }
.acb-lvl { color: var(--muted); font-size: .86rem; }
.acb-actions { display: flex; flex-wrap: wrap; gap: .5rem; }
.acb-btn { padding: .5rem .7rem; border: 1px solid var(--line-strong); background: var(--sheet); color: var(--ink); font-size: .85rem; font-weight: 700; text-decoration: none; }
.acb-btn:hover { border-color: var(--rust); }
.acb-btn.primary { background: var(--accent-fill); border-color: var(--accent-fill); color: var(--on-accent); }
.acb-btn.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.lang-tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.25rem 0 1.6rem; }
.lang-tab { display: inline-flex; align-items: center; gap: .5rem; padding: .55rem .75rem; border: 1px solid var(--line); color: var(--ink); text-decoration: none; }
.lang-tab.active, .lang-tab:hover { border-color: var(--rust); }
.lang-tab.active { background: var(--accent-soft); }
.lt-flag, .lgh-flag { font-size: 1.2rem; line-height: 1; }
.lt-text { display: grid; font-size: .86rem; line-height: 1.2; }
.lt-text small { margin-top: .12rem; color: var(--muted); }

.lang-group { display: none; }
.lang-group.show { display: block; }
.lang-group + .lang-group.show { margin-top: 1.7rem; }
.lang-group-head { display: flex; justify-content: space-between; align-items: baseline; flex-wrap: wrap; gap: .45rem .75rem; border-bottom: 1px solid var(--line); padding-bottom: .55rem; }
.lgh-title { display: flex; align-items: baseline; gap: .5rem; }
.lgh-title h2 { font-size: clamp(1.6rem, 3vw, 2rem); letter-spacing: -.035em; }
.lgh-native, .lgh-quick { font: 700 .86rem/1.4 var(--sans); }
.lgh-native { color: var(--muted); }

.course-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem; margin: .85rem 0; }
.course-card { display: flex; flex-direction: column; gap: .45rem; padding: clamp(.85rem, 3vw, 1.4rem); border: 1px solid var(--line); background: var(--sheet); color: var(--ink); text-decoration: none; }
.course-card:hover, .course-card.current { border-color: var(--rust); }
.course-top { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: .35rem .6rem; }
.course-badge { color: var(--muted); font-size: .78rem; }
.course-badge.active { color: var(--rust); font-weight: 700; }
.course-card strong { font: 400 1.6rem/1.1 var(--serif); letter-spacing: -.035em; }
.course-card small { flex: 1; color: var(--muted); font-size: .88rem; }
.course-go { margin-top: .3rem; color: var(--rust); font-size: .88rem; font-weight: 700; text-decoration: underline; }
.site-content .small { margin-top: 1.3rem; font-size: .88rem; }

@media (max-width: 560px) {
    .course-list { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    .btn { transition: none; }
}