@font-face{font-family:QingheSong;src:url('assets/subjects/qinghe-song.woff2') format('woff2');font-display:swap}
html[data-theme]{--theme-accent:#c74a4d;--theme-accent-hover:#b54144;--theme-ink:#1d1b1c;--theme-muted:#635e56;--theme-paper:#fffef8;--theme-line:#dcdad4;--theme-surface:#fffef8;--theme-soft:#fcf5ed;--theme-stage:#fffef8;--theme-tint:#fce7e1;--theme-strong-tint:#f7e8aa;--theme-inverse:#fffef8;--theme-focus:#98414a}
.nav .brand,.footer .brand{font-family:QingheSong,serif;font-size:28px;font-weight:400;letter-spacing:1px;gap:10px;color:var(--ink)}
html[data-theme] .nav .brand,html[data-theme] .footer .brand{color:var(--ink)}
.brand-dot{width:7px;height:7px;border-radius:50%;background:#2457bf;align-self:center}
.nav{height:112px;gap:32px}
.nav-links{gap:30px;font-size:14px}
.nav-actions{display:flex;align-items:center;gap:28px;padding-left:28px;border-left:1px solid var(--line);white-space:nowrap;font-size:14px}
.nav-visitor,.nav-join{display:inline-flex;align-items:center;gap:8px;min-height:44px}
.nav-visitor,.nav-join{border:0;border-bottom:1px solid var(--ink);border-radius:0;padding:10px 0;font-size:14px;font-weight:600}
.nav-visitor{color:#2775b6}
.nav-visitor:hover{color:#126bae}
.nav-join{color:#c74a4d}
.page-location{display:flex;align-items:center;gap:13px;padding-block:18px 0;font-size:13px;color:var(--muted)}
.page-location>a{color:var(--ink);border-bottom:1px solid var(--line)}
.page h1,.page h2{font-family:QingheSong,serif;font-weight:400;letter-spacing:0}
.btn{border-radius:0}
html[data-theme] .btn:not(.secondary){background:#c74a4d;color:#fffef8}
html[data-theme] .btn:not(.secondary):hover{background:#b54144}
.access-closed{min-height:52vh;padding-top:60px}
.access-closed h1{font-size:44px}
.access-closed .btn{margin-top:30px}
.teaching-summary{margin-top:8px;font-size:13px;line-height:1.6;color:var(--muted)}
.teaching-mode-line{display:flex;align-items:baseline;justify-content:space-between;gap:15px;padding-block:20px;border-bottom:1px solid var(--line);margin-bottom:24px;font-size:14px}
.teaching-mode-line strong{font-size:16px;font-weight:500;color:var(--ink)}
fieldset.form-section{min-width:0;margin:0;border:0;border-top:1px solid var(--line);padding:28px 0}
fieldset.form-section legend{padding:0 0 15px;font-family:QingheSong,serif;font-size:26px;color:var(--ink)}
.teaching-availability{margin-bottom:22px;color:var(--muted);font-size:14px}
.teaching-availability strong{color:var(--ink);font-weight:500}
.remote-choices{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.remote-choices .service-option{min-height:82px;align-items:center;border-radius:4px;padding:22px 18px;gap:13px}
.remote-choices .service-option strong{font-size:16px}
.remote-note{margin-top:20px;color:var(--muted);font-size:14px}
.remote-mismatch{margin-top:18px;font-size:14px;line-height:1.8}
.remote-mismatch a{text-decoration:underline;text-underline-offset:3px}
.contact-page{padding-top:32px}
.contact-page .page-heading{margin-bottom:30px}
.contact-page h1{font-size:52px;line-height:1.25;margin-bottom:18px}
.contact-page .breadcrumb{margin-bottom:28px}
.contact-page fieldset.form-section{padding-top:16px}
.teaching-mode-options{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.teaching-picker .tag-option{display:flex;align-items:center;gap:10px}
.direction-picker{border:0;padding:0;margin:0 0 25px;min-width:0}
.direction-picker legend{font-size:15px;margin-bottom:14px;padding:0}
.direction-picker .rule-note{margin-top:12px}
.custom-tag-inputs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}
.custom-tag-inputs .field{min-width:0}
.custom-tag-inputs [data-tag-count]{font-size:13px;font-variant-numeric:tabular-nums;text-align:right}
.custom-tag-inputs .over-limit{color:#b54144}
.custom-tag-preview{min-height:30px;margin-top:0}
.mentor-tags>span{max-width:100%;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
@media(max-width:600px){.custom-tag-inputs{grid-template-columns:1fr}.custom-tag-inputs .field{margin-bottom:10px}}
@media(max-width:600px){.remote-choices{grid-template-columns:1fr}.remote-choices .service-option{min-height:68px}.teaching-mode-line{padding-top:0}.teaching-mode-options{flex-direction:column;align-items:stretch}fieldset.form-section legend{font-size:23px}.contact-page h1{font-size:37px}.contact-page{padding-top:28px}}
.footer{border-top:1px solid var(--line);margin-top:30px;padding-block:32px}
.footer .brand{border:0}
@media(max-width:800px){.nav{height:auto;min-height:100px;flex-wrap:wrap;padding-top:16px;padding-bottom:12px;gap:8px 20px}.nav-actions{margin-left:auto}.nav-links{display:flex;order:3;width:100%;margin-left:0;gap:24px}.nav-links a:last-child{display:inline-flex}.nav-links a{display:inline-flex;align-items:center;min-height:44px}}
@media(max-width:600px){.nav{gap:8px}.nav .brand{font-size:23px}.nav-actions{gap:14px;padding-left:0;border-left:0;font-size:12px}.nav-visitor,.nav-join{margin-left:0;padding:10px 0;font-size:12px}.nav-links{font-size:13px;justify-content:space-between}.page-location{padding-top:13px}.access-closed h1{font-size:32px}}
.mentor-directions{display:flex;flex-wrap:wrap;gap:6px 12px;margin-top:14px;font-size:13px;line-height:1.6;color:var(--ink)}
.mentor-directions+.mentor-tags{margin-top:8px;padding-top:0}

/* The work stays on the student's drive; the sheet gives it a quiet, clear entrance. */
.work-available{display:inline-block;margin-left:12px;color:#875c3e;font-size:12px;white-space:nowrap}
.portfolio-section{margin-top:34px}
.work-sheet{--work-paper:#fffdf6;--work-rule:#d5c7ad;display:grid;min-width:0;padding:9px;background:var(--work-paper);border:1px solid var(--work-rule)}
.work-sheet.has-access{grid-template-columns:minmax(0,1fr) 176px}
.work-sheet-main{min-width:0;padding:24px 28px 26px;border:1px solid #e7decc}
.work-sheet-heading{display:grid;grid-template-columns:minmax(0,1fr) 200px;align-items:center;gap:18px;padding-bottom:20px;border-bottom:1px solid #e6ddcb}
.work-inscription{display:flex;align-items:center;gap:13px;min-width:0}
.work-seal{display:block;flex:none;padding:4px 5px;border:1px solid #af7767;border-radius:2px;color:#9b594c;font-family:QingheSong,serif;font-size:16px;line-height:1.05;text-align:center;transform:rotate(-4deg)}
.portfolio-section .work-title{margin:0;font-size:34px;line-height:1.3;letter-spacing:.14em;color:#443c2e;white-space:nowrap}
.work-schoolroom{position:relative;display:block;max-width:100%;width:200px;aspect-ratio:16/9;justify-self:end;overflow:hidden}
.work-schoolroom-still{display:block;width:100%;height:100%;object-fit:contain}
.work-schoolroom-sprite{position:absolute;inset:0;display:block;opacity:0;background-repeat:no-repeat}
.work-schoolroom[data-ready=true] .work-schoolroom-still{opacity:0}
.work-schoolroom[data-ready=true] .work-schoolroom-sprite{opacity:1}
.work-schoolroom[data-paused=true] .work-schoolroom-sprite{animation-play-state:paused}
html[data-motion=off] .work-schoolroom-sprite{display:none}
html[data-motion=off] .work-schoolroom-still{opacity:1}
@media(prefers-reduced-motion:reduce){.work-schoolroom-sprite{display:none}.work-schoolroom[data-ready=true] .work-schoolroom-still{opacity:1}}
.work-provider{min-width:0;max-width:100%;font-size:13px;color:#776a54;overflow-wrap:anywhere}
.portfolio-section .work-description{font-size:18px;line-height:2;color:#453e32;margin:25px 0 28px;white-space:pre-wrap;overflow-wrap:anywhere;text-wrap:pretty}
.work-sheet-footer{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:18px;color:#675d4d;font-size:13px;line-height:1.8}
.work-attribution{display:flex;flex-direction:column;gap:4px;max-width:100%;overflow-wrap:anywhere}
.work-open{display:inline-flex;align-items:center;gap:18px;min-height:44px;padding:0 12px;border:1px solid #bca982;color:#4b5548;font-size:15px;white-space:nowrap}
.work-open span{font-size:23px;line-height:1}
.work-open:hover{color:#98414a;border-color:currentColor}
.work-access-panel{min-width:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:20px 14px;border:1px solid #e7decc;border-left:0;background:#faf6eb}
.work-qr-preview{display:block;width:144px;max-width:100%;padding:0;border:1px solid #e1d9ca;background:#fff;cursor:zoom-in}
.work-qr-preview svg,.work-qr-large svg{display:block;width:100%;height:auto}
.work-qr-caption,.work-qr-fallback{font-size:12px;line-height:1.7;color:#72634e;text-align:center}
.work-qr-large{width:min(100%,420px);margin:16px auto;background:#fff;border:1px solid #e7decc}
.work-code-slip{min-width:0;max-width:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;margin-top:9px;padding-top:16px;border-top:1px solid #e3d9c5}
.work-code-label{font-family:QingheSong,serif;font-size:17px;letter-spacing:.2em;color:#6b6049}
.work-code-value{max-width:100%;font-family:Consolas,monospace;font-size:25px;line-height:1.45;letter-spacing:.06em;text-align:center;color:#985b4b;overflow-wrap:anywhere;user-select:all}
.work-copy{min-height:44px;max-width:100%;display:flex;align-items:center;gap:8px;border:0;border-bottom:1px solid #c6b693;padding:0;background:transparent;font-size:13px;color:#68563e}
.work-copy:hover{color:#98414a;border-color:currentColor}
.work-copy span{font-size:20px}
.portfolio-section .work-external-note{font-size:13px;line-height:1.7;color:var(--muted);margin-top:13px;white-space:normal}
.work-letter{position:relative;perspective:1200px}
.work-envelope{position:relative;display:block;height:244px;list-style:none;cursor:pointer;transition:height .65s cubic-bezier(.22,.68,.15,1)}
.work-envelope::-webkit-details-marker{display:none}
.work-envelope:focus-visible{outline:2px solid #98674f;outline-offset:5px}
.work-cover-scene{position:absolute;inset:0;display:grid;grid-template-columns:minmax(180px,.85fr) minmax(0,1.4fr);align-items:center;gap:10px;padding:20px 28px 20px 40px;border:1px solid #d5c7ad;background:#fffdf6;transform-origin:left center;backface-visibility:hidden;z-index:2;box-shadow:3px 5px 0 #efe8d980;overflow:hidden}
.work-cover-scene:after{content:"";position:absolute;inset:9px;border:1px solid #e7decc;pointer-events:none}
.work-cover-spine{position:absolute;top:10px;bottom:10px;left:17px;border-left:1px solid #d8c9ab}
.work-cover-inscription{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;gap:15px;min-width:0;color:#514636}
.work-cover-title{font-family:QingheSong,serif;font-size:38px;letter-spacing:.18em;white-space:nowrap}
.work-cover-author{font-size:13px;line-height:1.8;overflow-wrap:anywhere}
.work-letter-open-label{display:inline-flex;align-items:center;gap:24px;margin-top:10px;padding-bottom:5px;border-bottom:1px solid #bca982;font-size:14px;color:#805b44}
.work-letter-open-label>span{font-size:21px}
.work-landscape{display:block;width:100%;height:204px;object-fit:contain}
.work-cover-stamp{position:absolute;right:23px;bottom:24px;z-index:1;padding:5px 3px;border:1px solid #ad7967;border-radius:2px;color:#9b594c;font-family:QingheSong,serif;font-size:14px;letter-spacing:.12em;writing-mode:vertical-rl;transform:rotate(3deg)}
.work-letter-close-label{display:none;align-items:center;justify-content:flex-end;gap:15px;height:32px;font-size:13px;color:#78684f}
.work-letter[open]>.work-envelope{height:40px}
.work-letter[open] .work-cover-scene{height:244px;opacity:0;visibility:hidden;pointer-events:none;transform:rotateY(-100deg);animation:work-cover-turn .7s cubic-bezier(.22,.68,.15,1) both}
.work-letter[open] .work-letter-close-label{display:flex}
.work-letter[open] .work-sheet{animation:work-paper-reveal .85s cubic-bezier(.2,.65,.2,1) both}
.work-letter[open] .work-schoolroom{animation:work-ink-reveal 1s .2s both}
.work-letter[open] .work-access-panel,.work-letter[open] .work-sheet-footer{animation:work-content-reveal .45s .65s both}
@keyframes work-cover-turn{0%{opacity:1;visibility:visible;transform:rotateY(0)}75%{opacity:.6;visibility:visible}100%{opacity:0;visibility:hidden;transform:rotateY(-100deg)}}
@keyframes work-paper-reveal{from{opacity:0;transform:translateY(-18px)}to{opacity:1;transform:translateY(0)}}
@keyframes work-ink-reveal{from{opacity:0;filter:blur(4px);clip-path:inset(0 100% 0 0)}to{opacity:1;filter:blur(0);clip-path:inset(0)}}
@keyframes work-content-reveal{from{opacity:0}to{opacity:1}}
html[data-motion=off] .work-envelope{transition:none}
html[data-motion=off] .work-letter[open] .work-cover-scene,html[data-motion=off] .work-letter[open] .work-sheet,html[data-motion=off] .work-letter[open] .work-schoolroom,html[data-motion=off] .work-letter[open] .work-access-panel,html[data-motion=off] .work-letter[open] .work-sheet-footer{animation:none}
@media(prefers-reduced-motion:reduce){.work-envelope{transition:none}.work-letter[open] .work-cover-scene,.work-letter[open] .work-sheet,.work-letter[open] .work-schoolroom,.work-letter[open] .work-access-panel,.work-letter[open] .work-sheet-footer{animation:none}}
@media(max-width:1100px) and (min-width:801px){.work-sheet.has-access{grid-template-columns:1fr}.work-access-panel{display:grid;grid-template-columns:112px minmax(0,1fr);column-gap:20px;border-left:1px solid #e7decc;border-top:0;padding:16px 25px}.work-qr-preview{grid-column:1;grid-row:1;width:112px}.work-qr-caption{grid-column:1;grid-row:2}.work-code-slip{grid-column:2;grid-row:1/3;margin:0;padding:0;border:0;justify-self:center}.work-code-value{font-size:24px}.work-sheet-heading{grid-template-columns:minmax(0,1fr) 160px}.portfolio-section .work-title{font-size:30px}.work-cover-scene{grid-template-columns:minmax(130px,1fr) minmax(0,1.2fr);padding-left:31px;gap:0}.work-cover-title{font-size:32px}}
@media(max-width:600px){.work-sheet{padding:6px}.work-sheet.has-access{grid-template-columns:1fr}.work-sheet-main{padding:18px 18px 22px}.work-sheet-heading{grid-template-columns:minmax(0,1fr) 120px;gap:10px;padding-bottom:16px}.work-inscription{gap:8px}.work-seal{font-size:14px;padding:3px}.portfolio-section .work-title{font-size:28px;letter-spacing:.06em}.portfolio-section .work-description{font-size:17px;margin:22px 0}.work-access-panel{display:grid;grid-template-columns:112px minmax(0,1fr);column-gap:16px;border-left:1px solid #e7decc;border-top:0;padding:16px 18px}.work-qr-preview{grid-column:1;grid-row:1;width:112px}.work-qr-caption{grid-column:1;grid-row:2}.work-code-slip{grid-column:2;grid-row:1/3;margin:0;padding:0;border:0;justify-self:center}.work-code-value{font-size:24px;max-width:100%}.work-code-label{font-size:15px}.work-sheet-footer{gap:12px}.work-provider{font-size:12px}.work-available{margin-left:8px}.work-envelope{height:220px}.work-cover-scene{grid-template-columns:minmax(115px,1fr) minmax(0,1.1fr);padding:20px 14px 20px 29px;gap:0}.work-cover-title{font-size:30px;letter-spacing:.12em}.work-cover-author{font-size:12px}.work-letter-open-label{font-size:12px;gap:10px}.work-landscape{height:180px}.work-letter[open] .work-cover-scene{height:220px}.work-cover-stamp{right:18px;bottom:20px;font-size:12px}}