:root{--paper:#eee9da;--ink:#233f39;--muted:#687669;--line:#b9bfac;--accent:#3c6857}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 85% 10%,#d9dfcd66,transparent 45%),var(--paper);color:var(--ink);font:16px/1.7 system-ui,sans-serif}header{max-width:1120px;margin:auto;padding:30px 36px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}header>a{font:30px Georgia,'Songti SC',serif;letter-spacing:.2em}a{color:inherit;text-decoration:none}small{display:block;font:12px/2 system-ui;letter-spacing:.1em;color:var(--muted)}nav{display:flex;align-items:center;gap:20px;font-size:14px}main{max-width:960px;margin:55px auto;padding:0 28px}h1{font:44px/1.4 Georgia,'Songti SC',serif;letter-spacing:.1em;margin:10px 0}h2{font:23px/1.5 Georgia,'Songti SC',serif;margin:0 0 16px}.eyebrow{letter-spacing:.18em;font-size:12px;color:var(--muted)}.intro{color:var(--muted);margin:0 0 32px}.card{border:1px solid var(--line);border-radius:24px;padding:28px;margin:22px 0;background:#f7f5ec66}.muted{color:var(--muted);font-size:14px}label{display:block;font-size:14px;color:var(--muted)}input,select{display:block;width:100%;min-height:48px;border:1px solid var(--line);background:transparent;border-radius:25px;padding:10px 18px;color:var(--ink);font:16px system-ui;margin:8px 0 18px}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:12px;min-height:44px;padding:10px 21px;border:1px solid var(--line);border-radius:99px;background:transparent;color:var(--ink);font:inherit;cursor:pointer;transition:background .25s,transform .25s,border-color .25s}button:hover,.button:hover{background:#3c685710;border-color:var(--accent);transform:translateY(-1px)}button:disabled{opacity:.5;cursor:wait}.primary{background:var(--accent);border-color:var(--accent);color:#fff}.primary:hover{background:#315b4b}.primary span{margin-left:auto}#loginView{max-width:540px;margin:auto}#loginForm>.primary{width:100%;margin-top:10px}.code-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center}.code-row button{margin-top:5px}.test-card{padding:15px;color:var(--muted);font-size:13px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.chips button{font-size:13px}.notice{background:#e2e7d8;border-radius:14px;padding:14px}.split{display:flex;justify-content:space-between;gap:16px;align-items:center}.badge{border:1px solid var(--line);border-radius:30px;padding:3px 14px;font-size:13px}.stats{display:flex;gap:16px}.stats>div{flex:1;padding:20px;border-bottom:1px solid var(--line)}.stats b{display:block;font:32px Georgia}.fields{display:grid;grid-template-columns:1fr 1.4fr 1fr;gap:16px}.fields button{grid-column:1/-1;justify-self:end}.teacher{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:22px 0;border-top:1px solid var(--line)}.teacher h3{margin:0;font-weight:500}.teacher p{margin:4px 0}.teacher .actions{display:flex;flex-wrap:wrap;gap:8px;max-width:360px}.teacher button{font-size:13px;min-height:36px;padding:6px 14px}.teacher details{font-size:12px;color:var(--muted)}summary{cursor:pointer}#feedback{position:sticky;bottom:18px;border-radius:18px;background:var(--ink);color:white;padding:14px 22px;box-shadow:0 8px 30px #233f391c}#feedback:empty{display:none}footer{font-size:12px;color:var(--muted);margin:45px 0}*:focus-visible{outline:2px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}@media(max-width:650px){header{padding:20px;align-items:flex-start}nav{gap:10px;flex-wrap:wrap;justify-content:flex-end;max-width:190px}main{margin-top:30px;padding:0 18px}h1{font-size:35px}.card{padding:22px}.fields{grid-template-columns:1fr;gap:0}.teacher{align-items:flex-start;flex-direction:column}.code-row{grid-template-columns:1fr auto}.code-row button{padding:10px 14px}}
/* Shared paper, serif voice and unhurried easing from the soundscape controls. */
:root{--member-ease:cubic-bezier(.22,.68,.25,1)}body{background:#eee9da;color:#233f39}::selection{background:#3c685733;color:#233f39}input{caret-color:var(--accent)}input::placeholder{color:#687669}button,.button{transition:background 400ms var(--member-ease),border-color 400ms var(--member-ease),color 400ms var(--member-ease)}button:hover,.button:hover{transform:none}.login-page nav{display:none}.login-page main{max-width:520px;margin:clamp(42px,9vh,100px) auto 40px}.login-page h1{text-align:center;font-size:34px;margin-bottom:36px}.login-page .card{border:0;padding:0;background:none;margin:0}.login-page .notice{font-size:13px;padding:0;background:none;color:var(--muted)}.login-page input{min-height:54px}.login-page .primary{min-height:54px}#loginView{animation:account-arrive 620ms var(--member-ease)}@keyframes account-arrive{from{opacity:.45;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}#feedback{box-shadow:none;font-size:14px}dialog{max-width:min(460px,calc(100vw - 36px));padding:32px;border:1px solid var(--line);border-radius:24px;background:var(--paper);color:var(--ink)}dialog[open]{animation:account-arrive 400ms var(--member-ease)}dialog::backdrop{background:#233f394d}.dialog-actions{display:flex;gap:12px;justify-content:flex-end;margin-top:26px}.danger{color:#f8f3e7;background:#934d39;border-color:#934d39}.danger:hover{background:#7d402f}.danger-text{color:#934d39}details[open]>div{animation:account-arrive 400ms var(--member-ease)}.teacher small{font-variant-numeric:tabular-nums}#loginView h1,dialog h2{text-wrap:balance}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}@media(max-width:520px){.login-page h1{font-size:30px}.login-page main{padding:0 28px}.dialog-actions{flex-wrap:wrap}}
:root{--serif:'Songti SC','STSong','Noto Serif CJK SC',serif}header{height:100px;max-width:1500px;padding:20px 5%;margin:auto}header .brand-lockup{position:relative;display:inline-block;text-align:center;padding-left:65px;line-height:1.35;letter-spacing:4px;text-decoration:none;font-size:26px;font-family:var(--serif);flex-shrink:0}header .brand-lockup small{display:block;font:10px/1.8 var(--serif);letter-spacing:2px;margin-top:5px;color:inherit}.brand-mark{position:absolute;left:0;top:0;width:54px;height:54px;color:var(--ink)}.teacher .actions select{width:auto;max-width:160px;margin:0;min-height:40px;font-size:13px;padding:6px 14px}.teacher .actions{align-items:center}@media(max-width:800px){header{height:82px;padding:18px 22px}header .brand-lockup{font-size:21px;padding-left:54px;letter-spacing:3px}.brand-mark{width:44px;height:44px}header .brand-lockup small{font-size:9px;letter-spacing:1px}}@media(max-width:600px){header{height:72px;padding:16px 22px}header .brand-lockup{font-size:18px;padding-left:35px;letter-spacing:2px}header .brand-lockup .brand-mark{width:28px;height:28px}header .brand-lockup small{font-size:8px;letter-spacing:1px;margin-top:3px}}
.login-invitation{text-align:center;margin-bottom:36px;color:var(--ink)}
.login-page .login-invitation .seal-heading{display:flex;flex-direction:column;gap:16px;width:clamp(250px,27vw,360px);max-width:100%;margin:0 auto;line-height:0;font-size:0;letter-spacing:0}
.login-invitation .seal-main,.login-invitation .seal-sub{display:block;position:relative;width:100%;overflow:hidden;font-size:0;line-height:0;padding:0;margin:0}
.login-invitation .seal-main{aspect-ratio:1920/610}.login-invitation .seal-sub{aspect-ratio:1920/190}
.login-invitation .seal-heading img{display:block;position:absolute;left:0;width:100%;max-width:none;height:auto}
.login-invitation .seal-main img{top:0}.login-invitation .seal-sub img{bottom:0}
@media(max-width:600px){.login-page main{margin-top:35px}.login-page .login-invitation .seal-heading{width:250px;max-width:70vw;gap:10px}}

/* Same layered pigment silhouettes as the creation homepage. */
.login-invitation .seal-heading{position:relative;isolation:isolate;overflow:visible}
.login-invitation .seal-heading>.heading-ink{position:absolute;inset:-12% -13%;width:126%;height:124%;z-index:-1;color:var(--ink);pointer-events:none;transform:rotate(-7deg)}
@media(max-width:600px){.login-invitation .seal-heading>.heading-ink{inset:-8% -9%;width:118%;height:116%}}

:root{--member-trail-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1000 24' preserveAspectRatio='none'%3E%3Cdefs%3E%3ClinearGradient id='fade'%3E%3Cstop stop-opacity='0'/%3E%3Cstop offset='.16' stop-color='black'/%3E%3Cstop offset='.84' stop-color='black'/%3E%3Cstop offset='1' stop-opacity='0'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cpath d='M0 18 Q500 -8 1000 18' fill='none' stroke='url(%23fade)' stroke-width='1'/%3E%3C/svg%3E")}
header{position:relative;border-bottom:0}
header::after{content:'';position:absolute;left:5%;right:5%;bottom:-12px;height:24px;pointer-events:none;background:color-mix(in srgb,var(--accent) 32%,transparent);mask:var(--member-trail-mask) center/100% 100% no-repeat;-webkit-mask:var(--member-trail-mask) center/100% 100% no-repeat}

/* Compact account navigation, aligned nearer the right page edge. */
header nav{margin-left:auto;margin-right:-16px;gap:18px;font-size:13px;align-items:center}
header nav button{min-height:36px;padding:6px 15px;font-size:13px}
header nav a{display:inline-flex;align-items:center;min-height:36px}
@media(max-width:600px){header nav{margin-right:-6px;gap:10px;font-size:12px;max-width:190px}header nav button{font-size:12px;min-height:32px;padding:4px 11px}}
/* Match the listening page header geometry across all account screens. */
header{width:100%;max-width:none;height:105px;padding:22px 5%;margin:0}
header .brand-lockup{font-size:25px}
header nav{margin-right:20px}
header::after{left:50%;right:auto;bottom:-24px;width:min(90%,1296px);transform:translateX(-50%)}
@media(max-width:800px){header{height:85px;padding:18px 22px}header .brand-lockup{font-size:25px}}
@media(max-width:600px){header{height:72px;padding:16px 22px}header .brand-lockup{font-size:18px}header nav{margin-right:10px}}

/* Shared full-width footer, naturally below content and at least at viewport bottom. */
body{min-height:100vh;min-height:100svh;display:flex;flex-direction:column}
body>header{flex-shrink:0}body>main{width:100%}
body>footer{position:relative;display:flex;justify-content:space-between;gap:20px;flex-shrink:0;width:100%;max-width:none;margin:auto 0 0;padding:26px 5%;border:0;font:10px/1.7 system-ui,sans-serif;color:var(--muted)}
body>footer::before{content:'';position:absolute;left:0;right:0;top:0;height:20px;pointer-events:none;background:color-mix(in srgb,var(--accent) 32%,transparent);mask:var(--member-trail-mask) center/100% 100% no-repeat;-webkit-mask:var(--member-trail-mask) center/100% 100% no-repeat}
@media(max-width:600px){body>footer{flex-direction:column;gap:8px;padding:24px 22px;font-size:11px}}

@media(max-width:600px){header .brand-lockup{padding-left:52px}header .brand-lockup .brand-mark{width:44px;height:44px;top:50%;transform:translateY(-50%)}}

@media(max-width:600px){body>header{padding-inline:18px}}

.login-data-note{margin-top:1.25rem;font-size:.78rem;color:var(--muted,#617365);line-height:1.8}.login-data-note summary{cursor:pointer;text-align:center}.login-data-note p{margin:.75rem 0}