:root{--teacher-brand:#008b7a;--teacher-ink:#11213c;--teacher-muted:#61728f;--teacher-border:#e4eaf2;--teacher-bg:#f4faf9;--teacher-card:#fff;--teacher-danger:#b42318;font-family:"Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;color:var(--teacher-ink);background:var(--teacher-bg)}
*{box-sizing:border-box}
body{margin:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
.teacher-login{min-height:100vh;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(420px,.9fr);background:linear-gradient(115deg,#e9fbf8,#f8fcff 55%,#f2f8e8)}
.teacher-login__brand{padding:clamp(48px,9vw,136px);display:flex;flex-direction:column;justify-content:center;background:radial-gradient(circle at 12% 15%,#bdf5e8,transparent 36%),linear-gradient(145deg,#007e71,#075d68);color:#fff}
.teacher-login__brand-mark{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;font-size:26px;font-weight:700;background:#fff;color:var(--teacher-brand);box-shadow:0 12px 30px #003e4266}
.teacher-login__eyebrow,.teacher-card__eyebrow,.teacher-header__eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em}
.teacher-login__brand .teacher-login__eyebrow{margin:42px 0 12px;color:#c4fff2}
.teacher-login h1{margin:0;font-size:clamp(34px,4vw,60px);line-height:1.25}
.teacher-login__brand>p:not(.teacher-login__eyebrow){max-width:560px;font-size:18px;line-height:1.8;color:#ddfaf4}
.teacher-login__promises{padding:0;margin:24px 0 0;list-style:none;display:grid;gap:12px}
.teacher-login__promises li:before{content:"✓";display:inline-grid;place-items:center;width:22px;height:22px;margin-right:10px;border-radius:50%;background:#70eed2;color:#056d62;font-weight:800}
.teacher-login__panel{display:grid;place-items:center;background:#fff}
.teacher-login__panel-inner{width:min(100%,460px);padding:36px}
.teacher-login__logo{display:flex;align-items:center;gap:9px;color:var(--teacher-brand);font-weight:800}
.teacher-login__logo span{width:28px;height:28px;display:grid;place-items:center;border:1px solid #77e5d8;border-radius:9px}
.teacher-login__panel .teacher-login__eyebrow{margin:58px 0 8px;color:var(--teacher-brand)}
.teacher-login h2{font-size:32px;margin:0}
.teacher-login__description{color:var(--teacher-muted);margin:12px 0 30px}
.teacher-form{display:grid;gap:20px}
.teacher-form__field{display:grid;gap:8px}
.teacher-form label{font-weight:700;font-size:14px}
.teacher-form input{width:100%;min-height:48px;padding:12px 14px;border:1px solid #ccd7e5;border-radius:12px;background:#fff;outline:none;transition:border-color .15s,box-shadow .15s}
.teacher-form input:focus{border-color:var(--teacher-brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--teacher-brand) 16%,transparent)}
.teacher-form__help{margin:0;color:var(--teacher-muted);font-size:12px}
.teacher-form__error{margin:0;color:var(--teacher-danger);font-size:13px}
.teacher-button{border:0;border-radius:12px;min-height:46px;padding:0 19px;cursor:pointer;font-weight:700;transition:transform .15s,opacity .15s;display:inline-grid;place-items:center}
.teacher-button:focus-visible,.teacher-nav__item:focus-visible,.teacher-shell__brand:focus-visible{outline:3px solid #f4bb23;outline-offset:3px}
.teacher-button:hover{transform:translateY(-1px)}
.teacher-button:disabled{cursor:wait;opacity:.72;transform:none}
.teacher-button__loading{display:none}
.teacher-button--loading>span:first-child{display:none}
.teacher-button--loading .teacher-button__loading{display:inline}
.teacher-button--primary{color:#fff;background:var(--teacher-brand);box-shadow:0 8px 18px color-mix(in srgb,var(--teacher-brand) 23%,transparent)}
.teacher-button--secondary{color:var(--teacher-brand);background:#eafaf7}
.teacher-button--wide{width:100%}
.teacher-demo-hint{margin-top:28px;padding:15px 16px;display:grid;gap:4px;border:1px solid #d7eee9;border-radius:13px;background:#f4fdfb;color:#456174;font-size:13px}
.teacher-demo-hint strong{color:#126c63}
.teacher-flash{padding:13px 15px;margin:0 0 20px;border-radius:12px;font-size:14px}
.teacher-flash--error{color:#8b241d;background:#fff2f0;border:1px solid #ffd3ce}
.teacher-flash--success{color:#136a57;background:#edfff8;border:1px solid #b8f0db}
.teacher-shell{min-height:100vh;display:grid;grid-template-columns:240px minmax(0,1fr);padding:14px;gap:14px;background:radial-gradient(circle at 90% 0,#e9f8d9,transparent 27%),linear-gradient(145deg,#effafa,#f7fbff)}
.teacher-shell__sidebar,.teacher-shell__header,.teacher-card{background:var(--teacher-card);border:1px solid #e8edf3;box-shadow:0 8px 25px #14365a0d;border-radius:22px}
.teacher-shell__sidebar{padding:14px;display:flex;flex-direction:column;min-height:calc(100vh - 28px)}
.teacher-shell__brand{display:flex;align-items:center;gap:11px;padding:7px 5px 24px}
.teacher-shell__brand img,.teacher-shell__brand-mark{width:42px;height:42px;border-radius:50%;object-fit:cover}
.teacher-shell__brand-mark{display:grid;place-items:center;background:#e9faf7;color:var(--teacher-brand);font-weight:800}
.teacher-shell__brand strong,.teacher-shell__brand small,.teacher-header__profile strong,.teacher-header__profile small{display:block}
.teacher-shell__brand small,.teacher-header__profile small{margin-top:3px;color:var(--teacher-muted);font-size:12px}
.teacher-nav{display:grid;gap:5px}
.teacher-nav__label{margin:10px 8px 3px;color:#8b9ab1;font-size:11px;font-weight:700}
.teacher-nav__item{padding:9px 11px;border-radius:9px;color:#4a5f7c;font-size:13px;font-weight:650}
.teacher-nav__item span{margin-right:9px}
.teacher-nav__item--active{background:var(--teacher-brand);color:#fff}
.teacher-shell__sidebar-note{margin-top:auto;padding:15px;border-radius:15px;background:#f0fcfa;color:#4e687d;font-size:13px;line-height:1.55}
.teacher-shell__sidebar-note strong,.teacher-shell__sidebar-note span{display:block}
.teacher-shell__sidebar-note strong{color:var(--teacher-brand);margin-bottom:4px}
.teacher-shell__main{min-width:0}
.teacher-shell__header{min-height:64px;padding:12px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.teacher-header__eyebrow{margin:0 0 5px;color:var(--teacher-brand)}
.teacher-shell__header h1{margin:0;font-size:25px}
.teacher-header__profile{display:flex;align-items:center;gap:10px}
.teacher-header__avatar{width:38px;height:38px;display:grid;place-items:center;border-radius:50%;background:#e6faf6;color:var(--teacher-brand);font-weight:800}
.teacher-shell__content{width:min(100%,1280px);padding:14px 0 40px;margin:0 auto}
.teacher-card{padding:clamp(22px,4vw,34px);margin-bottom:18px}
.teacher-card__eyebrow{color:var(--teacher-brand);margin:0 0 8px}
.teacher-card h2{margin:0;font-size:22px}
.teacher-security__intro p:last-child,.teacher-card__heading p,.teacher-security__logout p{color:var(--teacher-muted);line-height:1.7}
.teacher-card__heading,.teacher-security__logout{display:flex;justify-content:space-between;align-items:flex-start;gap:18px;margin-bottom:26px}
.teacher-card__heading p,.teacher-security__logout p{margin:7px 0 0}
.teacher-status{padding:6px 10px;border-radius:99px;background:#eafaf7;color:var(--teacher-brand);font-size:12px;font-weight:700;white-space:nowrap}
.teacher-form__grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.teacher-security__logout{align-items:center;margin:0}
.teacher-security__logout form{margin:0}
@media(max-width:850px){.teacher-login{grid-template-columns:1fr}
.teacher-login__brand{display:none}
.teacher-login__panel{min-height:100vh}
.teacher-shell{grid-template-columns:1fr;padding:12px}
.teacher-shell__sidebar{min-height:auto}
.teacher-shell__sidebar-note{display:none}
.teacher-nav{grid-template-columns:repeat(2,minmax(0,1fr))}
.teacher-nav__label{grid-column:1/-1;margin-top:7px}
.teacher-shell__header{padding:18px}
.teacher-shell__content{padding:18px 2px}
}
@media(max-width:540px){.teacher-login__panel-inner{padding:28px 22px}
.teacher-login h2{font-size:27px}
.teacher-shell__header h1{font-size:21px}
.teacher-header__profile strong{font-size:14px}
.teacher-form__grid{grid-template-columns:1fr}
.teacher-card__heading,.teacher-security__logout{flex-direction:column}
.teacher-shell__sidebar{padding:13px}
.teacher-nav__item{font-size:14px}
.teacher-shell__brand{padding-bottom:12px}
}
.teacher-dashboard__hero{display:flex;align-items:flex-start;justify-content:space-between;gap:22px;position:relative;overflow:hidden;padding:26px 30px 58px;background:linear-gradient(105deg,#fff,#f8fffe 55%,#e7f5ff)}
.teacher-dashboard__hero:after{content:'✦';position:absolute;right:8%;top:-30px;font-size:180px;color:#c7e9f066;transform:rotate(20deg)}
.teacher-dashboard__hero>div{position:relative;z-index:1}.teacher-dashboard__hero .page-title{font-size:32px;line-height:1.28}.teacher-dashboard__hero p:last-child{max-width:700px;margin-bottom:0}.teacher-dashboard__hero-actions{display:flex;gap:10px;margin-top:8px;position:relative;z-index:2}
.teacher-dashboard__stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:-45px 15px 15px;position:relative;z-index:2}
.teacher-dashboard__stats .teacher-card{margin:0;padding:16px 18px;display:grid;gap:5px;min-width:0;border-radius:16px}.teacher-dashboard__stats strong{font-size:28px}.teacher-dashboard__workspace{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:14px}.teacher-dashboard__workspace>.teacher-card{margin-bottom:14px;padding:20px}.teacher-dashboard__workspace .teacher-card__heading{margin-bottom:14px}
.teacher-dashboard__courses{grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.teacher-dashboard__course{min-height:174px;align-content:start;transition:border-color .15s,box-shadow .15s}.teacher-dashboard__course:hover{border-color:color-mix(in srgb,var(--teacher-brand) 45%,var(--teacher-border));box-shadow:0 8px 20px #4abfac20}.teacher-dashboard__course .teacher-status{justify-self:start}.teacher-dashboard__course-link{color:var(--teacher-brand);font-size:12px;font-weight:700;margin-top:auto}.teacher-dashboard__course--new{place-content:center;text-align:center;border-style:dashed;background:#f5fffd;color:var(--teacher-brand)}.teacher-dashboard__course--new>strong{font-size:28px;font-weight:400}.teacher-dashboard__flow ol{padding:0;margin:0;list-style:none;counter-reset:flow}.teacher-dashboard__flow li{counter-increment:flow;padding:12px 4px;border-bottom:1px solid var(--teacher-border);color:var(--teacher-muted)}.teacher-dashboard__flow li:before{content:counter(flow,'decimal-leading-zero') '　';color:#97a6b6;font-weight:700}.teacher-dashboard__flow li.is-ready{color:var(--teacher-brand)}.teacher-dashboard__flow li.is-ready:before{content:'✓　'}.teacher-dashboard__modules{padding:20px}.teacher-dashboard__module-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.teacher-dashboard__module{padding:16px;border:1px solid var(--teacher-border);border-radius:14px;display:grid;gap:7px;min-height:155px;background:#fff}.teacher-dashboard__module>span{width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:#e8fbf7;color:var(--teacher-brand);font-size:18px}.teacher-dashboard__module small{color:var(--teacher-muted);line-height:1.55}.teacher-dashboard__module em{margin-top:auto;color:var(--teacher-brand);font-size:12px;font-style:normal;font-weight:700}.teacher-dashboard__module.is-planned{background:#fafcfc;color:#718093}.teacher-dashboard__module.is-planned>span{background:#f0f3f5;color:#8894a3}.teacher-dashboard__module.is-planned em{color:#8894a3}
.teacher-dashboard__hero p:last-child,.teacher-wallet__hero p:last-child,.teacher-wallet__purchase p{color:var(--teacher-muted);line-height:1.7}
.teacher-dashboard__stats,.teacher-wallet__balances{display:grid;grid-template-columns:repeat(4,minmax(0, 1fr));gap:18px}
.teacher-dashboard__stats .teacher-card,.teacher-wallet__balances .teacher-card{margin:0;display:grid;gap:7px;min-width:0}
.teacher-dashboard__stats small,.teacher-wallet__balances small{color:var(--teacher-muted)}
.teacher-dashboard__stats strong,.teacher-wallet__balances strong{font-size:clamp(28px,4vw,42px);line-height:1;color:var(--teacher-brand)}
.teacher-dashboard__stats span,.teacher-wallet__balances span{color:var(--teacher-muted);font-size:13px;overflow-wrap: anywhere}
.teacher-dashboard__stats a{color:var(--teacher-brand);font-weight:700}
.teacher-dashboard__courses{display:grid;grid-template-columns:repeat(2,minmax(0, 1fr));gap:12px}
.teacher-dashboard__course{display:grid;gap:8px;padding:17px;border:1px solid var(--teacher-border);border-radius:15px;background:#fbfefd;min-width:0}
.teacher-dashboard__course strong,.teacher-dashboard__course small{overflow-wrap: anywhere}
.teacher-dashboard__course small{color:var(--teacher-muted)}
.teacher-wallet__sources{display:grid;grid-template-columns:repeat(3,minmax(0, 1fr));gap:12px;margin:0}
.teacher-wallet__sources div{padding:17px;border-radius:14px;background:#f4fbfa;min-width:0}
.teacher-wallet__sources dt{color:var(--teacher-muted);font-size:13px}
.teacher-wallet__sources dd{margin:7px 0 0;font-weight:800;overflow-wrap: anywhere}
.teacher-wallet__filters{display:grid;grid-template-columns:repeat(3,minmax(0, 1fr)) auto;gap:13px;align-items:end}
.teacher-wallet__filters select,.teacher-wallet__filters input{width:100%;min-height:48px;padding:12px 14px;border:1px solid #ccd7e5;border-radius:12px;background:#fff}
.teacher-wallet__table-wrap{overflow-x:auto}
.teacher-wallet__table{width:100%;min-width:720px;border-collapse:collapse;text-align:left}
.teacher-wallet__table th,.teacher-wallet__table td{padding:13px 10px;border-bottom:1px solid var(--teacher-border);vertical-align:top}
.teacher-wallet__table th{color:var(--teacher-muted);font-size:12px}
.teacher-wallet__table td{overflow-wrap: anywhere}
.teacher-pagination{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;flex-wrap:wrap}
.teacher-pagination a{padding:8px 12px;border-radius:9px;background:#eafaf7;color:var(--teacher-brand);font-weight:700}
/* Dashboard density overrides stay after shared wallet/course rules. */
.teacher-dashboard__stats{gap:12px;margin:-45px 15px 15px}
.teacher-dashboard__stats .teacher-card{padding:16px 18px;gap:5px;border-radius:16px}
.teacher-dashboard__stats strong{font-size:28px}
.teacher-dashboard__courses{grid-template-columns:repeat(3,minmax(0,1fr))}
@media (max-width: 1024px){.teacher-dashboard__stats,.teacher-wallet__balances{grid-template-columns:repeat(2,minmax(0, 1fr))}.teacher-wallet__filters{grid-template-columns:repeat(2,minmax(0, 1fr))}}
@media (max-width: 1100px){.teacher-dashboard__workspace{grid-template-columns:1fr}.teacher-dashboard__courses{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-dashboard__module-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width: 768px){.teacher-dashboard__hero,.teacher-wallet__hero,.teacher-wallet__purchase{align-items:flex-start;flex-direction:column}.teacher-dashboard__hero{padding-bottom:26px}.teacher-dashboard__hero .page-title{font-size:26px}.teacher-dashboard__hero-actions{flex-wrap:wrap}.teacher-dashboard__stats{margin:12px 0}.teacher-dashboard__stats,.teacher-wallet__balances,.teacher-dashboard__courses,.teacher-dashboard__module-grid,.teacher-wallet__sources,.teacher-wallet__filters{grid-template-columns:minmax(0,1fr)}.teacher-wallet__hero .teacher-button,.teacher-wallet__purchase .teacher-button{width:100%}}
.teacher-quiz__hero{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}.teacher-quiz__hero p{color:var(--teacher-muted)}.teacher-quiz__columns{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.teacher-quiz__inline{display:flex;gap:12px;align-items:end;flex-wrap:wrap}.teacher-quiz__inline label,.teacher-card form>label{display:grid;gap:7px}.teacher-quiz__inline input,.teacher-quiz__inline select,.teacher-card form textarea,.teacher-card form>label input{padding:11px;border:1px solid var(--teacher-border);border-radius:10px;background:#fff}.teacher-quiz__list{display:grid;gap:9px;margin-top:18px}.teacher-quiz__list>a,.teacher-quiz__list>div{display:grid;gap:4px;padding:13px;border:1px solid var(--teacher-border);border-radius:11px}.teacher-quiz__list small,.teacher-quiz__paper small,.teacher-quiz__questions small{color:var(--teacher-muted)}.teacher-quiz__questions{display:grid;gap:8px;margin:20px 0;padding:16px;border:1px solid var(--teacher-border);border-radius:12px}.teacher-quiz__questions label{display:flex;align-items:flex-start;gap:10px}.teacher-quiz__questions span{display:grid;gap:3px}.teacher-quiz__paper{display:grid;gap:14px}.teacher-quiz__paper li{display:grid;gap:7px}.teacher-quiz__paper input{width:100%;padding:10px;border:1px solid var(--teacher-border);border-radius:9px}.teacher-quiz__actions{display:flex;gap:9px}.teacher-quiz__table{width:100%;border-collapse:collapse}.teacher-quiz__table th,.teacher-quiz__table td{padding:11px;border-bottom:1px solid var(--teacher-border);text-align:left;vertical-align:top}.teacher-quiz__grading{display:grid;gap:14px;margin:18px 0}.teacher-quiz__grading article{padding:15px;border:1px solid var(--teacher-border);border-radius:12px}.teacher-quiz__grading blockquote{margin:10px 0;padding:12px;background:#f6faf9}.teacher-quiz__stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-top:20px}.teacher-quiz__stats>div{display:grid;gap:5px;padding:15px;background:#f4fbfa;border-radius:12px}.teacher-quiz__stats strong{font-size:26px;color:var(--teacher-brand)}@media(max-width:768px){.teacher-quiz__columns,.teacher-quiz__stats{grid-template-columns:1fr}.teacher-quiz__hero{flex-direction:column}}
/* Marketplace */
.marketplace-note{border-left:4px solid var(--teacher-brand);padding:1rem 1.25rem;background:#f4fbf9;line-height:1.7}
.marketplace-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}
.marketplace-card{display:flex;flex-direction:column;gap:.65rem}.marketplace-card h2{margin:0}.marketplace-card__meta{display:flex;justify-content:space-between;color:#667085;font-size:.9rem}.marketplace-card__actions{margin-top:auto}.marketplace-card__stats{color:var(--teacher-muted);font-size:.9rem}
.marketplace-search{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:end}.marketplace-search input,.marketplace-rating select,.marketplace-download input{width:100%;min-height:46px;padding:10px 12px;border:1px solid #ccd7e5;border-radius:10px;background:#fff}
.marketplace-detail__facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1rem;margin-top:1rem}.marketplace-detail__facts div{padding:1rem;background:#f8fafc;border-radius:8px}.marketplace-json{white-space:pre-wrap;overflow:auto;background:#f8fafc;padding:1rem;border-radius:8px;max-height:420px}.marketplace-actions,.marketplace-download{display:grid;gap:1rem}.marketplace-action-row{display:flex;align-items:end;gap:1rem;flex-wrap:wrap}.marketplace-action-row form{margin:0}.marketplace-rating{display:flex;align-items:end;gap:.65rem;flex-wrap:wrap}.marketplace-rating label{width:100%}.marketplace-download form{max-width:480px;display:grid;gap:1rem}
@media(max-width:600px){.marketplace-search{grid-template-columns:1fr}.marketplace-search .teacher-button,.marketplace-action-row form,.marketplace-action-row .teacher-button,.marketplace-rating,.marketplace-download .teacher-button{width:100%}.marketplace-rating select{flex:1}}

/* AI teaching workspace */
.teacher-ai{--ai-purple:#6558e8;--ai-blue:#4e83f1;--ai-soft:#f3f2ff;--ai-ink:#17203a}
.teacher-ai__hero{min-height:280px;padding:clamp(28px,5vw,54px);display:flex;align-items:center;justify-content:space-between;gap:36px;overflow:hidden;position:relative;background:radial-gradient(circle at 84% 16%,#ffffff40 0 8%,transparent 9%),linear-gradient(125deg,#343095 0%,#5d56d9 53%,#5689ed 100%);color:#fff;border:0}
.teacher-ai__hero:before,.teacher-ai__hero:after{content:"";position:absolute;border:1px solid #ffffff1f;border-radius:50%}.teacher-ai__hero:before{width:360px;height:360px;right:-100px;top:-190px}.teacher-ai__hero:after{width:230px;height:230px;right:180px;bottom:-190px}
.teacher-ai__hero-copy{max-width:720px;position:relative;z-index:1}.teacher-ai__spark{display:grid;place-items:center;width:48px;height:48px;margin-bottom:20px;border-radius:15px;background:#ffffff1f;font-size:24px;box-shadow:inset 0 0 0 1px #ffffff25}.teacher-ai__hero .teacher-card__eyebrow{color:#dcdcff}.teacher-ai__hero h2{font-size:clamp(28px,4vw,44px);line-height:1.25}.teacher-ai__hero-copy>p:last-of-type{max-width:680px;color:#e8e9ff;line-height:1.8}.teacher-ai__hero-actions{display:flex;gap:12px;margin-top:24px}.teacher-ai__hero .teacher-button--primary{background:#fff;color:#4d48bc;box-shadow:0 12px 24px #1c216d36}.teacher-ai__ghost{color:#fff;background:#ffffff12;border:1px solid #ffffff42}
.teacher-ai__quota{width:210px;min-width:210px;padding:24px;border-radius:22px;background:#ffffff16;border:1px solid #ffffff2e;backdrop-filter:blur(8px);display:grid;gap:5px;position:relative;z-index:1}.teacher-ai__quota>span,.teacher-ai__quota>small{color:#dfe3ff}.teacher-ai__quota>strong{font-size:52px;line-height:1.1}.teacher-ai__quota>div{display:flex;justify-content:space-between;margin-top:14px;padding-top:14px;border-top:1px solid #ffffff24;color:#e6e8ff;font-size:12px}.teacher-ai__quota-warning{margin:10px 0 0;padding:8px;border-radius:9px;background:#fff2c71f;color:#fff3c4;font-size:12px;line-height:1.5}
.teacher-ai__capability-section{margin:26px 0}.teacher-ai__section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:16px}.teacher-ai__section-head h2{margin:0;font-size:23px}.teacher-ai__section-head .teacher-card__eyebrow{margin-bottom:5px}.teacher-ai__section-head>span,.teacher-ai__section-head>a{color:var(--teacher-muted);font-size:13px}.teacher-ai__section-head>a{color:var(--ai-purple);font-weight:700}
.teacher-ai__capabilities{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:13px}.teacher-ai__capability{min-height:158px;padding:18px;display:grid;grid-template-columns:46px 1fr;grid-template-rows:auto auto 1fr;column-gap:13px;border:1px solid var(--teacher-border);border-radius:18px;background:#fff;box-shadow:0 7px 22px #24335c0a;transition:.18s ease;position:relative}.teacher-ai__capability:hover,.teacher-ai__capability.is-selected{transform:translateY(-3px);border-color:#8178ec;box-shadow:0 14px 30px #524bc326}.teacher-ai__capability.is-selected:after{content:"✓";position:absolute;right:12px;top:12px;width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:var(--ai-purple);color:#fff;font-size:12px}.teacher-ai__capability-icon{grid-row:1/3;width:46px;height:46px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(145deg,#eeecff,#e8f4ff);color:var(--ai-purple);font-size:21px}.teacher-ai__capability strong{align-self:end}.teacher-ai__capability small{color:var(--teacher-muted);font-size:12px}.teacher-ai__capability em{grid-column:1/-1;align-self:end;justify-self:start;padding:5px 9px;border-radius:20px;background:#ecfaf5;color:#148468;font-size:11px;font-style:normal;font-weight:700}.teacher-ai__capability.is-disabled{opacity:.58}.teacher-ai__capability.is-disabled em{background:#f1f3f5;color:#7a8795}
.teacher-ai__composer{padding:clamp(24px,4vw,38px)}.teacher-ai__composer-head{display:flex;justify-content:space-between;gap:24px}.teacher-ai__composer-head>div>p:last-child{color:var(--teacher-muted);line-height:1.7}.teacher-ai__safe-badge{height:max-content;padding:7px 12px;border-radius:99px;background:#eeecff;color:var(--ai-purple);font-size:12px;font-weight:700}.teacher-ai__form{display:grid;gap:20px;margin-top:22px}.teacher-ai__form select,.teacher-ai__form textarea{width:100%;padding:13px 15px;border:1px solid #d8deea;border-radius:13px;background:#fbfcff;font:inherit;color:var(--ai-ink);outline:none}.teacher-ai__form select{min-height:50px}.teacher-ai__form textarea{resize:vertical;line-height:1.7}.teacher-ai__form select:focus,.teacher-ai__form textarea:focus{border-color:var(--ai-purple);box-shadow:0 0 0 4px #6558e817}.teacher-ai__form small{color:var(--teacher-muted)}.teacher-ai__form-footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-top:2px}.teacher-ai__form-footer p{margin:0;color:var(--teacher-muted);font-size:13px}.teacher-ai__composer .teacher-button--primary,.teacher-ai__task-detail .teacher-button--primary{background:linear-gradient(135deg,var(--ai-purple),var(--ai-blue))}.teacher-ai__estimate{margin-top:24px;padding:18px 20px;border:1px solid #dedcff;border-radius:16px;background:#f8f7ff;display:flex;align-items:center;justify-content:space-between;gap:20px}.teacher-ai__estimate>div{display:grid;gap:4px}.teacher-ai__estimate strong{font-size:22px;color:var(--ai-purple)}.teacher-ai__estimate small{color:var(--teacher-muted)}
.teacher-ai__facts{margin:22px 0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.teacher-ai__facts>div{padding:16px;border-radius:14px;background:#f7f8fc}.teacher-ai__facts dt{color:var(--teacher-muted);font-size:12px}.teacher-ai__facts dd{margin:7px 0 0;font-weight:800;overflow-wrap:anywhere}.teacher-ai__state{padding:6px 10px;border-radius:99px;font-size:11px;font-style:normal;font-weight:750;white-space:nowrap}.teacher-ai__state--pending{background:#fff6dc;color:#956300}.teacher-ai__state--running{background:#eaf2ff;color:#326bd2}.teacher-ai__state--succeeded{background:#e9f9f3;color:#15785f}.teacher-ai__state--failed{background:#fff0ef;color:#b23a32}.teacher-ai__execute{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:18px;border-radius:15px;background:#f5f4ff}.teacher-ai__execute p{margin:0;color:var(--teacher-muted)}.teacher-ai__result{padding:20px;border-radius:16px;background:#f7f8fc}.teacher-ai__result pre{white-space:pre-wrap;overflow:auto;line-height:1.7;font-family:inherit}.teacher-ai__result img{display:block;max-width:100%;height:auto;border-radius:14px}.teacher-ai__result figcaption{margin-top:10px;color:var(--teacher-muted);font-size:12px}.teacher-ai__error{padding:18px;border:1px solid #ffd3ce;border-radius:14px;background:#fff6f5}.teacher-ai__error p{color:#8b423b}.teacher-ai__error a{color:var(--ai-purple);font-weight:700}
.teacher-ai__history{padding:25px}.teacher-ai__task-list{display:grid}.teacher-ai__task-list>a{display:grid;grid-template-columns:42px minmax(0,1fr) auto 16px;align-items:center;gap:13px;padding:14px 5px;border-top:1px solid var(--teacher-border)}.teacher-ai__task-list>a:first-child{border-top:0}.teacher-ai__task-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:var(--ai-soft);color:var(--ai-purple)}.teacher-ai__task-list>a>span:nth-child(2){display:grid;gap:4px;min-width:0}.teacher-ai__task-list small{color:var(--teacher-muted);overflow-wrap:anywhere}.teacher-ai__task-list b{font-size:22px;color:#a2acbc}.teacher-ai__history-empty,.teacher-ai__empty{text-align:center;padding:34px}.teacher-ai__history-empty>span,.teacher-ai__empty>span{font-size:30px;color:#8e86ed}.teacher-ai__history-empty p,.teacher-ai__empty p{color:var(--teacher-muted)}
@media(max-width:1100px){.teacher-ai__capabilities{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.teacher-ai__hero{align-items:flex-start;flex-direction:column}.teacher-ai__quota{width:100%}.teacher-ai__capabilities{grid-template-columns:1fr}.teacher-ai__composer-head,.teacher-ai__form-footer,.teacher-ai__estimate,.teacher-ai__execute{align-items:stretch;flex-direction:column}.teacher-ai__form-footer .teacher-button,.teacher-ai__estimate .teacher-button,.teacher-ai__execute .teacher-button{width:100%}.teacher-ai__facts{grid-template-columns:repeat(2,minmax(0,1fr))}.teacher-ai__task-list>a{grid-template-columns:42px minmax(0,1fr) auto}.teacher-ai__task-list b{display:none}}
@media(max-width:480px){.teacher-ai__hero-actions{flex-direction:column}.teacher-ai__hero-actions .teacher-button{width:100%}.teacher-ai__facts{grid-template-columns:1fr}.teacher-ai__task-list>a{grid-template-columns:36px minmax(0,1fr)}.teacher-ai__task-list .teacher-ai__state{grid-column:2;justify-self:start}}

/* Navigation and AI visual review fixes */
.teacher-shell__sidebar-head{display:block}.teacher-shell__menu-toggle{display:none}
.teacher-ai__hero{min-height:240px;padding:36px 42px}.teacher-ai__spark{width:42px;height:42px;margin-bottom:14px}.teacher-ai__hero h2{font-size:clamp(28px,3.2vw,40px)}.teacher-ai__hero-actions{margin-top:18px}.teacher-ai__quota{padding:20px}.teacher-ai__capability{min-height:118px;grid-template-rows:auto auto auto;padding:16px}.teacher-ai__capability em{grid-column:2;align-self:end;margin-top:12px}.teacher-ai__composer{padding:28px}.teacher-ai__form textarea{min-height:150px}.teacher-ai__history{padding:22px}
@media(max-width:850px){
 .teacher-shell{display:block;padding:10px}.teacher-shell__sidebar{min-height:0;margin-bottom:10px;padding:10px 12px;border-radius:16px}.teacher-shell__sidebar-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.teacher-shell__brand{padding:2px 0}.teacher-shell__brand img,.teacher-shell__brand-mark{width:36px;height:36px}.teacher-shell__brand small{display:none}.teacher-shell__menu-toggle{display:flex;align-items:center;gap:7px;min-height:42px;padding:8px 12px;border:1px solid var(--teacher-border);border-radius:10px;background:#f5fbfa;color:var(--teacher-brand);font:inherit;font-weight:700}.teacher-nav{display:none!important;grid-template-columns:1fr!important;margin-top:10px;padding-top:8px;border-top:1px solid var(--teacher-border)}.teacher-nav.is-open{display:grid!important}.teacher-nav__label{grid-column:auto!important}.teacher-shell__header{min-height:58px;padding:10px 15px;border-radius:16px}.teacher-shell__content{padding:10px 0 30px}.teacher-header__eyebrow{font-size:11px}.teacher-shell__header h1{font-size:19px}.teacher-header__profile small{display:none}
}
@media(max-width:760px){
 .teacher-ai__hero{min-height:0;padding:24px 20px;gap:22px}.teacher-ai__spark{width:38px;height:38px;margin-bottom:12px}.teacher-ai__hero h2{font-size:27px;margin-bottom:10px}.teacher-ai__hero-copy>p:last-of-type{line-height:1.6}.teacher-ai__hero-actions{margin-top:16px}.teacher-ai__quota{min-width:0;padding:16px 18px;border-radius:16px}.teacher-ai__quota>strong{font-size:38px}.teacher-ai__capability-section{margin:20px 0}.teacher-ai__section-head{align-items:flex-start}.teacher-ai__section-head h2{font-size:20px}.teacher-ai__capability{min-height:84px;grid-template-columns:42px 1fr auto;grid-template-rows:auto auto;padding:14px}.teacher-ai__capability-icon{grid-row:1/3;width:42px;height:42px}.teacher-ai__capability em{grid-column:3;grid-row:1/3;align-self:center;margin:0}.teacher-ai__composer{padding:20px 17px}.teacher-ai__composer-head h2{font-size:21px}.teacher-ai__safe-badge{align-self:flex-start}.teacher-ai__form textarea{min-height:130px}.teacher-ai__history{padding:18px 16px}
}
@media(max-width:480px){.teacher-shell__brand strong{font-size:14px}.teacher-header__profile>span:last-child{display:none}.teacher-ai__hero-actions{display:grid;grid-template-columns:1fr 1fr}.teacher-ai__capability em{font-size:10px;padding:4px 7px}.teacher-ai__section-head>span{max-width:90px;text-align:right}.teacher-ai__task-list>a{padding:12px 0}}

/* AI workspace v2: task-first information architecture */
.teacher-ai-v2{--aiv2:#5b57df;--aiv2-dark:#36328f;--aiv2-soft:#f2f1ff;--aiv2-line:#e6e8f0;color:#20263a}
.teacher-ai-v2__page-head,.teacher-ai-v2__intro{display:flex;align-items:center;justify-content:space-between;gap:24px;margin:5px 0 18px;padding:18px 5px}.teacher-ai-v2__page-head h2,.teacher-ai-v2__intro h2{margin:0;font-size:30px;line-height:1.25}.teacher-ai-v2__page-head p:last-child,.teacher-ai-v2__intro p:last-child{margin:7px 0 0;color:var(--teacher-muted)}.teacher-ai-v2__intro>div{display:flex;align-items:center;gap:16px}.teacher-ai-v2__intro>a{color:var(--aiv2);font-weight:750}.teacher-ai-v2__intro-icon{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(145deg,var(--aiv2-dark),#7286f3);color:#fff;font-size:22px;box-shadow:0 12px 24px #4b47c82a}.teacher-ai-v2__head-actions{display:flex;gap:10px}
.teacher-ai-v2__workspace{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:18px;align-items:start}.teacher-ai-v2__builder{padding:30px;margin:0}.teacher-ai-v2__step-head{display:flex;align-items:center;gap:13px;margin-bottom:18px}.teacher-ai-v2__step-head>span,.teacher-ai-v2__confirm-step{width:32px;height:32px;flex:0 0 auto;display:grid;place-items:center;border-radius:50%;background:var(--aiv2);color:#fff;font-weight:800}.teacher-ai-v2__step-head h3{margin:0 0 3px;font-size:20px}.teacher-ai-v2__step-head p{margin:0;color:var(--teacher-muted);font-size:13px}.teacher-ai-v2__divider{height:1px;margin:28px 0;background:var(--aiv2-line)}
.teacher-ai-v2__capabilities{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.teacher-ai-v2__capability{min-height:72px;padding:12px 14px;display:grid;grid-template-columns:42px minmax(0,1fr) 24px;align-items:center;gap:11px;border:1px solid var(--aiv2-line);border-radius:14px;background:#fff;transition:.16s ease}.teacher-ai-v2__capability:hover{border-color:#aaa6f4;background:#fcfcff}.teacher-ai-v2__capability.is-selected{border-color:var(--aiv2);background:var(--aiv2-soft);box-shadow:0 0 0 2px #5b57df12}.teacher-ai-v2__capability>span:first-child{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:#f2f4ff;color:var(--aiv2);font-size:18px}.teacher-ai-v2__capability>span:nth-child(2){display:grid;gap:4px;min-width:0}.teacher-ai-v2__capability small{color:var(--teacher-muted)}.teacher-ai-v2__capability b{color:#9ba3b2;font-size:18px;text-align:center}.teacher-ai-v2__capability.is-selected b{width:22px;height:22px;display:grid;place-items:center;border-radius:50%;background:var(--aiv2);color:#fff;font-size:11px}.teacher-ai-v2__capability.is-disabled{opacity:.55}
.teacher-ai-v2__form{display:grid;gap:17px}.teacher-ai-v2__form label{display:grid;gap:8px;font-weight:700}.teacher-ai-v2__form select,.teacher-ai-v2__form textarea{width:100%;padding:13px 14px;border:1px solid #d7dce7;border-radius:11px;background:#fbfcfe;color:#20263a;font:inherit;outline:none}.teacher-ai-v2__form textarea{min-height:155px;resize:vertical;line-height:1.7}.teacher-ai-v2__form select:focus,.teacher-ai-v2__form textarea:focus{border-color:var(--aiv2);box-shadow:0 0 0 3px #5b57df16}.teacher-ai-v2__form label>small{font-weight:400;color:var(--teacher-muted)}.teacher-ai-v2__submit{display:flex;align-items:center;justify-content:space-between;gap:20px}.teacher-ai-v2__submit>span{color:var(--teacher-muted);font-size:13px}.teacher-ai-v2 .teacher-button--primary{background:var(--aiv2);border-color:var(--aiv2);box-shadow:none}.teacher-ai-v2 .teacher-button--primary:hover{background:#4c48ca}.teacher-ai-v2__confirm{margin-top:22px;padding:18px;display:flex;align-items:center;justify-content:space-between;gap:20px;border:1px solid #d9d6ff;border-radius:14px;background:#f8f7ff}.teacher-ai-v2__confirm>div{display:flex;align-items:center;gap:13px}.teacher-ai-v2__confirm>div>div{display:grid;gap:2px}.teacher-ai-v2__confirm strong{font-size:22px;color:var(--aiv2)}.teacher-ai-v2__confirm p{margin:0;color:var(--teacher-muted);font-size:12px}
.teacher-ai-v2__rail{display:grid;gap:14px}.teacher-ai-v2__rail .teacher-card{margin:0;padding:20px;border-radius:16px}.teacher-ai-v2__quota-card>div:first-child{display:flex;align-items:center;justify-content:space-between}.teacher-ai-v2__quota-card>div:first-child>span{font-weight:800}.teacher-ai-v2__quota-card em{padding:4px 8px;border-radius:99px;background:#eaf8f3;color:#14745d;font-size:11px;font-style:normal}.teacher-ai-v2__quota-card em.is-warning{background:#fff2dd;color:#9a6500}.teacher-ai-v2__quota-card>strong{display:block;margin:17px 0 1px;font-size:44px;line-height:1;color:var(--aiv2-dark)}.teacher-ai-v2__quota-card>small{color:var(--teacher-muted)}.teacher-ai-v2__quota-card dl{display:grid;grid-template-columns:1fr 1fr;margin:20px 0 0;padding-top:16px;border-top:1px solid var(--aiv2-line)}.teacher-ai-v2__quota-card dl>div+div{padding-left:15px;border-left:1px solid var(--aiv2-line)}.teacher-ai-v2__quota-card dt{color:var(--teacher-muted);font-size:12px}.teacher-ai-v2__quota-card dd{margin:5px 0 0;font-weight:800}.teacher-ai-v2__quota-card>p{margin:15px 0 0;padding:10px;border-radius:9px;background:#fff6e7;color:#7c5a1b;font-size:12px;line-height:1.55}.teacher-ai-v2__rail-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.teacher-ai-v2__rail-head h3{margin:0;font-size:16px}.teacher-ai-v2__rail-head a{color:var(--aiv2);font-size:12px;font-weight:700}.teacher-ai-v2__recent>div:last-child{display:grid}.teacher-ai-v2__recent>div:last-child>a{padding:11px 0;display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid var(--aiv2-line)}.teacher-ai-v2__recent>div:last-child>a:first-child{border-top:0}.teacher-ai-v2__recent a>span{display:grid;gap:3px;min-width:0}.teacher-ai-v2__recent small{color:var(--teacher-muted);font-size:11px}.teacher-ai-v2__muted{color:var(--teacher-muted);font-size:13px}.teacher-ai-v2__notice{padding:17px 19px;border-radius:14px;background:#eef7ff;color:#39536b}.teacher-ai-v2__notice strong{color:#274761}.teacher-ai-v2__notice p{margin:6px 0 0;font-size:12px;line-height:1.65}
.teacher-ai-v2__records{padding:0;overflow:hidden}.teacher-ai-v2__records-head{padding:20px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--aiv2-line)}.teacher-ai-v2__records-head span{color:var(--teacher-muted);font-size:13px}.teacher-ai-v2__record-list>a{min-height:78px;padding:14px 24px;display:grid;grid-template-columns:42px minmax(0,1fr) 120px 80px 15px;align-items:center;gap:14px;border-bottom:1px solid var(--aiv2-line)}.teacher-ai-v2__record-list>a:last-child{border-bottom:0}.teacher-ai-v2__record-list>a:hover{background:#fafaff}.teacher-ai-v2__record-icon{width:40px;height:40px;display:grid;place-items:center;border-radius:11px;background:var(--aiv2-soft);color:var(--aiv2)}.teacher-ai-v2__record-main{display:grid;gap:5px}.teacher-ai-v2__record-main small,.teacher-ai-v2__record-points{color:var(--teacher-muted);font-size:12px}.teacher-ai-v2__record-list b{color:#a0a8b6;font-size:20px}.teacher-ai-v2__empty{padding:60px 20px;text-align:center}.teacher-ai-v2__empty>span{font-size:30px;color:var(--aiv2)}.teacher-ai-v2__empty h3{margin:12px 0 6px}.teacher-ai-v2__empty p{color:var(--teacher-muted)}
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