:root{--color-primary:#cc785c;--color-primary-active:#a9583e;--color-primary-disabled:#e6dfd8;--color-accent-teal:#5db8a6;--color-accent-amber:#e8a55a;--color-canvas:#faf9f5;--color-surface-soft:#f5f0e8;--color-surface-card:#efe9de;--color-surface-cream-strong:#e8e0d2;--color-surface-dark:#181715;--color-surface-dark-elevated:#252320;--color-surface-dark-soft:#1f1e1b;--color-hairline:#e6dfd8;--color-hairline-soft:#ebe6df;--color-ink:#141413;--color-body-strong:#252523;--color-body:#3d3d3a;--color-muted:#6c6a64;--color-muted-soft:#8e8b82;--color-on-primary:#ffffff;--color-on-dark:#faf9f5;--color-on-dark-soft:#a09d96;--color-success:#5db872;--color-warning:#d4a017;--color-error:#c64545;--color-bg:var(--color-canvas);--color-surface:var(--color-surface-card);--color-text:var(--color-ink);--color-border:var(--color-hairline);--color-primary-text:var(--color-on-primary);--color-danger:var(--color-error);--color-admin:var(--color-primary-active);--font-body:var(--font-jp),var(--font-sc),-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Hiragino Sans","Yu Gothic UI",sans-serif;--font-display:var(--font-body);--font-zh:var(--font-sc),var(--font-jp),-apple-system,BlinkMacSystemFont,sans-serif;--font-pinyin:"Times New Roman",Times,serif;--font-mono:var(--font-pinyin);--space-xxs:4px;--space-xs:8px;--space-sm:12px;--space-md:16px;--space-lg:24px;--space-xl:32px;--space-xxl:48px;--space-section:96px;--radius-xs:4px;--radius-sm:6px;--radius-md:8px;--radius-lg:12px;--radius-xl:16px;--radius-pill:9999px;--max-width:1080px;--gap:var(--space-md)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:var(--font-body);background:var(--color-canvas);color:var(--color-body);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}a{color:var(--color-primary);text-underline-offset:2px}a:hover{color:var(--color-primary-active)}h1,h2,h3,h4{font-family:var(--font-display);color:var(--color-ink);font-weight:600;margin:0}h1{font-size:clamp(2rem,5vw,3rem);line-height:1.1;letter-spacing:-.025em;margin:0 0 var(--space-sm)}h2{font-size:clamp(1.45rem,4vw,1.95rem);line-height:1.2;letter-spacing:-.02em}h2,h3{margin:0 0 var(--space-xs)}h3{font-size:1.15rem;line-height:1.3;letter-spacing:-.012em;font-weight:600}p{margin:0 0 var(--space-sm);color:var(--color-body);max-width:64ch}strong{color:var(--color-body-strong);font-weight:600}.muted{color:var(--color-muted);font-size:.925rem;line-height:1.55}.page-center{position:relative;min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-xl) var(--space-md);background:var(--color-canvas);overflow:hidden}.page-center:before{content:"";position:absolute;inset:0;background:radial-gradient(62% 48% at 50% -8%,var(--color-surface-soft) 0,transparent 60%);pointer-events:none}.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:var(--space-xxl) var(--space-lg) var(--space-section)}.card{position:relative;z-index:1;width:100%;max-width:440px;background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:var(--radius-xl);padding:var(--space-xl)}.btn,button{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-xs);min-height:44px;width:100%;font-family:var(--font-body);font-size:.95rem;font-weight:500;letter-spacing:0;padding:12px 20px;border:1px solid transparent;border-radius:var(--radius-md);background:var(--color-primary);color:var(--color-on-primary);cursor:pointer;text-decoration:none;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.btn:active,.btn:hover,button:active:not(:disabled),button:hover:not(:disabled){background:var(--color-primary-active)}.btn:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid var(--color-primary);outline-offset:2px}button:disabled{background:var(--color-primary-disabled);color:var(--color-muted-soft);cursor:not-allowed}.btn-secondary{background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline)}.btn-secondary:hover:not(:disabled){background:var(--color-surface-soft);border-color:var(--color-muted-soft);color:var(--color-ink)}.btn-google{background:#ffffff;color:var(--color-body-strong);border:1px solid var(--color-hairline);font-weight:600;gap:var(--space-sm)}.btn-google:hover:not(:disabled){background:var(--color-surface-soft);border-color:var(--color-muted-soft);color:var(--color-ink)}.btn-google:disabled{background:var(--color-surface-soft);color:var(--color-muted-soft);border-color:var(--color-hairline)}.btn-google svg{flex:0 0 auto}.login-divider{display:flex;align-items:center;gap:var(--space-sm);color:var(--color-muted);font-size:.85rem}.login-divider:after,.login-divider:before{content:"";flex:1 1 auto;height:1px;background:var(--color-hairline)}label{display:block;font-family:var(--font-body);font-size:.825rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--color-muted);margin-bottom:var(--space-xs)}input[type=email],input[type=number],input[type=search],input[type=text],select{width:100%;font-family:var(--font-body);font-size:16px;color:var(--color-ink);min-height:44px;padding:11px 14px;border:1px solid var(--color-hairline);border-radius:var(--radius-md);background:var(--color-canvas);transition:border-color .15s ease,box-shadow .15s ease;-webkit-appearance:none;-moz-appearance:none;appearance:none}input::placeholder{color:var(--color-muted-soft)}input:focus,select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(204,120,92,.15)}.stack{display:flex;flex-direction:column;gap:var(--gap)}.alert{border-radius:var(--radius-md);padding:var(--space-sm) var(--space-md);font-size:.9rem;line-height:1.5;border:1px solid var(--color-hairline);background:var(--color-surface-soft);color:var(--color-body)}.alert strong{color:var(--color-ink)}.alert-error{background:#f9efed;color:#8f3a2f;border-color:#e6c9c2;border-left:3px solid var(--color-error)}.alert-success{background:#eef3ec;color:#34603f;border-color:#cfddcc;border-left:3px solid var(--color-success)}.alert-info{background:var(--color-surface-card);color:var(--color-body-strong);border-color:var(--color-hairline);border-left:3px solid var(--color-accent-amber)}.brandmark{flex:0 0 auto;width:22px;height:22px;color:var(--color-primary)}.logo,.wordmark{display:inline-flex;align-items:center;gap:var(--space-xs)}.logo{text-decoration:none;color:var(--color-ink)}.logo-mark{width:auto;height:30px;display:block}.logo:hover{color:var(--color-ink)}.logo:hover .logo-mark{opacity:.82;transition:opacity .15s ease}.logo-wordmark{font-family:var(--font-zh);font-size:1.12rem;font-weight:700;letter-spacing:.02em;color:var(--color-ink)}@media (max-width:420px){.topbar .logo-wordmark{display:none}}.login-logo{display:block;margin-bottom:var(--space-lg)}.login-logo-mark{width:100%;max-width:260px;height:auto;display:block}.card h1{font-family:var(--font-zh);font-size:clamp(2.4rem,8vw,2.9rem);letter-spacing:.01em;margin-bottom:var(--space-xs)}@media (min-width:600px){.history-title{white-space:nowrap}}.app-menu{position:relative;display:inline-flex}.app-menu-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;padding:0;border:1px solid var(--color-hairline);border-radius:var(--radius-md);background:var(--color-canvas);color:var(--color-ink);cursor:pointer}.app-menu-button:active:not(:disabled),.app-menu-button:hover:not(:disabled),.app-menu-button[aria-expanded=true]{background:var(--color-surface-soft);color:var(--color-ink);border-color:var(--color-muted-soft)}.app-menu-list{position:absolute;top:calc(100% + 6px);left:0;z-index:40;min-width:200px;display:flex;flex-direction:column;padding:var(--space-xs);background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);box-shadow:0 6px 24px rgba(20,20,19,.12)}.app-menu-item{display:block;padding:10px 14px;border-radius:var(--radius-md);font-size:.95rem;font-weight:500;color:var(--color-ink);text-decoration:none}.app-menu-item:hover{background:var(--color-surface-soft)}.topbar{display:flex;flex-wrap:wrap;gap:var(--space-sm);align-items:center;justify-content:flex-start;background:var(--color-canvas);border-bottom:1px solid var(--color-hairline);padding:var(--space-sm) var(--space-lg);position:-webkit-sticky;position:sticky;top:0;z-index:30}.topbar-left{display:inline-flex;align-items:center;gap:var(--space-md)}.topbar .brand{font-family:var(--font-display);font-size:1.18rem;font-weight:500;letter-spacing:-.01em;color:var(--color-ink)}.topbar .spacer{flex:1 1}.topbar [data-testid=current-user]{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border-radius:var(--radius-pill);background:var(--color-surface-soft);font-size:.875rem;font-weight:500;color:var(--color-body-strong);white-space:nowrap;max-width:18ch;overflow:hidden;text-overflow:ellipsis}.topbar [data-testid=current-user]:before{content:"";flex:0 0 auto;width:7px;height:7px;border-radius:var(--radius-pill);background:var(--color-success)}.topbar .badge-admin{margin-right:-2px}.topbar form{width:auto}.topbar .btn,.topbar form button{width:auto;min-height:38px;padding:8px 16px;font-size:.875rem}@media (max-width:520px){.topbar{padding:var(--space-sm) var(--space-md);gap:var(--space-xs)}.topbar [data-testid=current-user]{display:none}}.badge{display:inline-flex;align-items:center;font-family:var(--font-body);font-size:.72rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;padding:4px 10px;border-radius:var(--radius-pill);background:var(--color-surface-card);color:var(--color-body-strong);border:1px solid var(--color-hairline);white-space:nowrap}.badge-admin{background:var(--color-primary);color:var(--color-on-primary);border-color:var(--color-primary)}.badge-plan{gap:6px;background:color-mix(in srgb,var(--color-accent-teal) 12%,var(--color-canvas));color:#2f7d6f;border-color:color-mix(in srgb,var(--color-accent-teal) 32%,transparent)}.badge-plan:before{content:"";width:6px;height:6px;border-radius:var(--radius-pill);background:var(--color-accent-teal)}.badge-plan.badge-plan-labeled:before{display:none}.grid{display:grid;grid-gap:var(--space-md);gap:var(--space-md);grid-template-columns:1fr}@media (min-width:640px){.grid{grid-template-columns:repeat(2,1fr)}}@media (min-width:1024px){.grid-3{grid-template-columns:repeat(3,1fr)}}.info-card{background:var(--color-surface-card);border:1px solid var(--color-hairline-soft);border-radius:var(--radius-lg);padding:var(--space-lg)}.info-card h3{margin:0 0 var(--space-xs);font-size:1.1rem}.info-card p{margin:0;color:var(--color-muted);font-size:.9rem}code{font-family:var(--font-mono);background:var(--color-surface-cream-strong);color:var(--color-body-strong);padding:2px 6px;border-radius:var(--radius-xs);font-size:.82em}.eyebrow{display:inline-block;font-family:var(--font-body);font-size:.72rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--color-primary);margin-bottom:var(--space-sm)}.hero{padding-top:var(--space-sm);padding-bottom:var(--space-xs)}.hero h1{max-width:28ch;text-wrap:balance;word-break:keep-all}.hero-name{color:var(--color-primary);white-space:nowrap}.lead{font-size:1.1rem;line-height:1.55;color:var(--color-body-strong);max-width:64ch}.card-tag{display:inline-block;font-family:var(--font-body);font-size:.68rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;padding:3px 9px;border-radius:var(--radius-pill);margin-bottom:var(--space-sm);background:var(--color-primary);color:var(--color-on-primary)}.card-tag-muted{background:transparent;color:var(--color-muted);border:1px solid var(--color-hairline)}.info-card-dark{background:var(--color-surface-dark);border-color:var(--color-surface-dark)}.info-card-dark h3{color:var(--color-on-dark)}.info-card-dark p{color:var(--color-on-dark-soft)}.info-card-dark .card-tag{background:var(--color-primary);color:var(--color-on-primary)}.category-tabs{display:flex;flex-wrap:wrap;gap:var(--space-xs)}.category-tab{width:auto;min-height:42px;gap:var(--space-xs);padding:9px 15px;font-size:.9rem;font-weight:500;background:var(--color-canvas);color:var(--color-muted);border:1px solid var(--color-hairline);border-radius:var(--radius-pill)}.category-tab-icon{flex:0 0 auto;color:var(--color-muted-soft);transition:color .15s ease}.category-tab:hover:not(:disabled){background:var(--color-surface-soft);color:var(--color-ink)}.category-tab:hover:not(:disabled) .category-tab-icon{color:var(--color-primary)}.category-tab-active,.category-tab-active:hover:not(:disabled){background:var(--color-surface-cream-strong);color:var(--color-ink);border-color:var(--color-primary)}.category-tab-active .category-tab-icon{color:var(--color-primary)}.suggestion-block{display:flex;flex-direction:column;gap:var(--space-xs);padding-top:var(--space-xxs);border-top:1px solid var(--color-hairline-soft);margin-top:var(--space-xxs)}.suggestion-block-label{display:flex;align-items:center;gap:var(--space-xs);margin:var(--space-xs) 0 var(--space-xxs);font-size:.9rem;font-weight:500;color:var(--color-body-strong);max-width:none}.suggestion-item{position:relative;width:100%;justify-content:flex-start;text-align:left;background:var(--color-canvas);color:var(--color-ink);border:1px solid var(--color-hairline);border-radius:var(--radius-md);padding:12px 16px 12px 18px;font-size:.95rem;min-height:46px}.suggestion-item:before{content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:0 var(--radius-pill) var(--radius-pill) 0;background:var(--color-hairline);transition:background-color .15s ease}.suggestion-item:hover:not(:disabled){background:var(--color-surface-soft);border-color:var(--color-muted-soft);color:var(--color-ink)}.suggestion-item:hover:not(:disabled):before{background:var(--color-accent-amber)}.suggestion-item-active,.suggestion-item-active:hover:not(:disabled){background:var(--color-surface-cream-strong);border-color:var(--color-primary);color:var(--color-ink);font-weight:500}.suggestion-item-active:before,.suggestion-item-active:hover:not(:disabled):before{background:var(--color-primary)}body:has(.conversation){height:100vh;height:100svh;height:100dvh;display:flex;flex-direction:column;overflow:hidden;padding-top:0;padding-bottom:0}body:has(.conversation) .topbar{position:static;flex:none;padding-top:calc(var(--space-sm) + env(safe-area-inset-top, 0px))}.conversation{width:100%;max-width:760px;margin:0 auto;padding:var(--space-lg) var(--space-md) 0;display:flex;flex-direction:column;gap:var(--space-md);flex:1 1;min-height:0;overflow:hidden}.conversation-header{display:flex;flex-wrap:wrap;gap:var(--space-md);align-items:flex-start;justify-content:space-between;border-bottom:1px solid var(--color-hairline);padding-bottom:var(--space-md);flex:none}.conversation-topbar-row{display:flex;width:100%;align-items:center;justify-content:space-between;gap:var(--space-sm)}.conversation-theme-block{display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-xxs);padding-bottom:var(--space-sm);margin-bottom:var(--space-xs);border-bottom:1px solid var(--color-hairline)}.btn-end-conversation--top{min-height:0;padding:6px 12px;font-size:.8rem;white-space:nowrap;flex:none}.conversation-back{display:flex;width:-moz-fit-content;width:fit-content;align-items:center;gap:.35em;margin-bottom:0;padding:var(--space-xxs) var(--space-xs);-webkit-margin-start:calc(-1 * var(--space-xs));margin-inline-start:calc(-1 * var(--space-xs));font-size:.95rem;font-weight:600;color:var(--color-body-strong);text-decoration:none;border-radius:var(--radius-sm);transition:background-color .15s ease,color .15s ease}.conversation-back:hover{background:var(--color-surface-soft,rgba(20,20,19,.05));color:var(--color-ink,var(--color-body-strong))}.conversation-back:focus-visible{outline:2px solid var(--color-body-strong);outline-offset:2px}.conversation-theme{font-size:1.4rem;margin:var(--space-xxs) 0 var(--space-xs)}@media (max-width:640px){.conversation{padding-top:var(--space-md);gap:var(--space-sm)}.conversation-header{padding-bottom:var(--space-sm);gap:var(--space-xs)}.conversation-theme{font-size:1.12rem;line-height:1.35;margin:2px 0 var(--space-xxs)}}.conversation-messages{display:flex;flex-direction:column;gap:var(--space-md);flex:1 1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:var(--space-md) 0;overscroll-behavior:contain}.bubble{border-radius:var(--radius-lg);padding:var(--space-md);max-width:88%;line-height:1.6}.bubble-user{align-self:flex-end;background:var(--color-canvas);border:1px solid var(--color-hairline);color:var(--color-ink);font-size:1.05rem;border-bottom-right-radius:var(--radius-xs)}.ai-turn{display:flex;flex-direction:column;gap:var(--space-xs);align-self:flex-start;max-width:94%;width:100%}@media (min-width:720px){.ai-turn:has(.feedback-card):has(.bubble-ai-reply){display:grid;grid-template-columns:1fr 1fr;grid-gap:var(--space-sm);gap:var(--space-sm);align-items:start}.ai-turn:has(.feedback-card):has(.bubble-ai-reply) .ai-turn-id{grid-column:1/-1}}.ai-turn-id{display:flex;align-items:center;gap:var(--space-xs);margin-bottom:2px}.ai-avatar{display:inline-block;width:28px;height:28px;border-radius:var(--radius-pill);object-fit:cover;background:var(--color-canvas);border:1px solid var(--color-hairline)}.ai-turn-name{font-size:.78rem;font-weight:500;letter-spacing:.02em;color:var(--color-muted)}.feedback-head{display:flex;align-items:center;gap:var(--space-xs);margin-bottom:var(--space-sm)}.feedback-num{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:26px;height:26px;border-radius:var(--radius-pill);background:var(--color-primary);color:var(--color-on-primary);font-family:var(--font-body);font-size:.82rem;font-weight:600;line-height:1}.feedback-titles{display:flex;flex-direction:column;line-height:1.15}.feedback-title{font-family:var(--font-body);font-size:.95rem;font-weight:600;color:var(--color-ink)}.feedback-sub{font-size:.66rem;font-weight:500;letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted-soft)}.feedback-card{position:relative;background:var(--color-surface-card);border-radius:var(--radius-lg);border:1px solid var(--color-hairline-soft);border-left:4px solid var(--color-hairline);padding:var(--space-md) var(--space-md) var(--space-md) var(--space-lg)}.feedback-correction--a{border-left-color:var(--color-success)}.feedback-correction--b{border-left-color:var(--color-warning)}.feedback-correction--c{border-left-color:var(--color-error)}.feedback-text{font-family:var(--font-body);font-size:.95rem;line-height:1.65;white-space:pre-wrap;word-break:break-word;margin:0;color:var(--color-body)}.feedback-body{display:flex;flex-direction:column;margin-top:2px;padding-top:var(--space-sm);border-top:1px solid var(--color-hairline)}.feedback-section{padding:var(--space-sm) 0;border-top:1px solid var(--color-hairline-soft)}.feedback-section:first-child{border-top:none;padding-top:0}.feedback-section:last-child{padding-bottom:0}.feedback-label{display:block;font-family:var(--font-body);font-size:.7rem;font-weight:600;letter-spacing:.08em;color:var(--color-muted);margin-bottom:5px}.feedback-section-text{margin:0;font-family:var(--font-body);font-size:.95rem;line-height:1.65;color:var(--color-body);white-space:pre-wrap;word-break:break-word}.feedback-section--verdict .feedback-label{margin-bottom:4px}.feedback-section--verdict .feedback-section-text{font-size:1.06rem;font-weight:700;line-height:1.5;letter-spacing:.01em;color:var(--color-body-strong)}.feedback-correction--a .feedback-section--verdict .feedback-section-text{color:#2f7d4f}.feedback-correction--b .feedback-section--verdict .feedback-section-text{color:#9a7406}.feedback-correction--c .feedback-section--verdict .feedback-section-text{color:var(--color-error)}.feedback-section--suggestion{margin:var(--space-sm) 0;padding:var(--space-sm) var(--space-md) var(--space-md);background:#ffffff;border:1px solid var(--color-hairline);border-radius:var(--radius-lg);box-shadow:0 1px 3px rgba(20,20,19,.06)}.feedback-section--suggestion .feedback-label{display:flex;align-items:center;gap:6px;color:var(--color-body-strong);margin-bottom:7px}.feedback-section--suggestion .feedback-label:before{content:"";flex:0 0 auto;width:14px;height:2px;border-radius:1px;background:var(--color-success)}.feedback-suggestion-text{margin:0;font-family:var(--font-zh);font-size:1.14rem;font-weight:700;line-height:1.7;letter-spacing:.01em;color:var(--color-ink);word-break:break-word}.bubble-ai-reply{position:relative;align-self:flex-start;background:var(--color-surface-card);border:1px solid var(--color-hairline-soft);border-bottom-left-radius:var(--radius-xs);padding:var(--space-md) var(--space-lg)}.bubble-ai-reply .feedback-num--reply{background:var(--color-surface-dark);color:var(--color-on-dark)}.reply-text{margin:0;font-size:1.2rem;line-height:1.75;color:var(--color-ink)}.reply-text,.zh{font-family:var(--font-zh)}.pinyin{font-family:var(--font-pinyin)}.badge-coral{background:var(--color-primary);color:var(--color-on-primary);border-color:var(--color-primary);font-size:.68rem;letter-spacing:.04em}.composer{flex:none;z-index:5;background:var(--color-canvas);border-top:1px solid var(--color-hairline);box-shadow:0 -10px 18px -14px rgba(20,20,19,.16);padding:var(--space-sm) 0 max(var(--space-md),env(safe-area-inset-bottom,0px));display:flex;flex-direction:column;gap:var(--space-xs)}.composer-controls{order:1}.composer>.usage-note{order:2}.composer-row{order:5;display:flex;gap:var(--space-sm);align-items:flex-end;background:var(--color-surface-soft);border:1px solid var(--color-hairline);border-radius:var(--radius-xl);padding:var(--space-xs)}.composer-mic{flex:0 0 auto;width:50px;min-width:50px;height:50px;min-height:50px;padding:0;border-radius:var(--radius-pill);background:var(--color-canvas);color:var(--color-primary);border:1.5px solid var(--color-hairline);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .15s ease,color .15s ease,border-color .15s ease,box-shadow .15s ease}.composer-mic:hover:not(:disabled){border-color:var(--color-primary);background:#fbf2ee;color:var(--color-primary-active)}.composer-mic:focus-visible{outline:none;box-shadow:0 0 0 3px rgba(204,120,92,.2)}.composer-mic--recording{background:var(--color-primary);color:var(--color-on-primary,#fff);border-color:var(--color-primary);animation:mic-pulse 1.4s ease-in-out 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var(--color-accent-amber);font-size:.86rem;line-height:1.55}.alert-error[data-testid=rec-error]:before{content:"🎙";flex:0 0 auto;font-size:.95rem;line-height:1.5;filter:grayscale(.25)}.voice-draft-hint{display:flex;align-items:flex-start;gap:var(--space-xs);font-size:.84rem;line-height:1.45;color:var(--color-body-strong);background:#fbf2ee;border:1px solid #ecd6cc;border-left:3px solid var(--color-primary);border-radius:var(--radius-md);padding:var(--space-xs) var(--space-sm) var(--space-xs) var(--space-md);margin:0;max-width:none}.voice-draft-hint:before{content:"✓";flex:0 0 auto;color:var(--color-primary);font-weight:700}@media (prefers-reduced-motion:reduce){.composer-mic--recording,.rec-dot,.rec-spinner{animation:none}}.composer-input{flex:1 1;width:100%;font-family:var(--font-body);font-size:16px;color:var(--color-ink);padding:11px 15px;border:1px solid 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(max-width:640px){.mode-hint{display:none}}.usage-status{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:500;color:var(--color-muted);white-space:nowrap;padding:3px 11px;border-radius:var(--radius-pill);background:var(--color-surface-soft);border:1px solid var(--color-hairline);transition:color .15s ease,background-color .15s ease,border-color .15s ease}.usage-status:before{content:"";flex:0 0 auto;width:6px;height:6px;border-radius:50%;background:var(--color-accent-teal)}.usage-status--warn{color:#8a6a12;font-weight:600;background:#faf3e2;border-color:#ecdcb6}.usage-status--warn:before{background:var(--color-warning)}.usage-status--blocked{color:#8f3a2f;font-weight:600;background:#f9efed;border-color:#e6c9c2}.usage-status--blocked:before{background:var(--color-error)}.usage-note{margin:var(--space-xs) 0 0;font-size:.78rem;line-height:1.55;color:#8a6a12;padding:var(--space-xs) 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ending-spin{to{transform:rotate(1turn)}}.ending-overlay-text{margin:0;font-family:var(--font-body);font-size:1.05rem;font-weight:600;color:var(--color-ink)}.ending-overlay-sub{margin:0;font-family:var(--font-body);font-size:.85rem;line-height:1.6;color:var(--color-muted)}@media (prefers-reduced-motion:reduce){.ending-spinner{animation-duration:1.6s}}.history-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:var(--space-sm)}.history-list>li{min-width:0}.history-card{position:relative;display:grid;grid-template-columns:1fr auto;align-items:center;grid-gap:var(--space-md);gap:var(--space-md);background:var(--color-surface-card);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);padding:var(--space-md) var(--space-lg) var(--space-md) var(--space-xl);text-decoration:none;color:var(--color-ink);overflow:hidden;transition:border-color .15s ease,background-color .15s ease,transform .15s ease}.history-card:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--color-hairline);transition:background-color .15s ease}.history-card:has(.history-badge-active):before{background:var(--color-primary)}.history-card:hover{border-color:var(--color-muted-soft);background:var(--color-surface-cream-strong)}.history-card:hover .history-card-chevron{background:var(--color-primary);color:var(--color-on-primary);border-color:var(--color-primary)}.history-card-main{display:flex;flex-direction:column;gap:6px;min-width:0}.history-card 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var(--color-hairline);background:var(--color-surface-cream-strong)}.script-speaker{display:inline-flex;align-items:center;font-size:.7rem;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted-soft)}.script-line-self .script-speaker{color:var(--color-body-strong)}.script-utterance{font-size:1.25rem;line-height:1.7;letter-spacing:.01em;color:var(--color-ink);overflow-wrap:anywhere}@media (max-width:480px){.history-card{padding:var(--space-md) var(--space-md) var(--space-md) var(--space-lg);gap:var(--space-sm)}.history-card-theme{font-size:1.15rem}.history-tabs{display:flex;width:100%}.history-tab{flex:1 1;padding:8px 10px;text-align:center}.summary-block-body{padding-left:0}.summary-block-body:has(.summary-text){margin-left:0}.harvest-table-wrap{overflow-x:visible}.harvest-table{border:none;background:transparent}.harvest-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.harvest-table tbody tr{display:block;margin-bottom:var(--space-sm);background:var(--color-surface-card);border:1px solid var(--color-hairline);border-radius:var(--radius-md);overflow:hidden}.harvest-table tbody tr:last-child{margin-bottom:0}.harvest-table tbody tr:nth-child(2n) td{background:transparent}.harvest-table tbody td{display:flex;gap:var(--space-sm);align-items:baseline;padding:9px var(--space-md);border-bottom:1px solid var(--color-hairline-soft);white-space:normal}.harvest-table tbody td:last-child{border-bottom:none}.harvest-table tbody td:before{content:attr(data-label);flex:0 0 84px;font-family:var(--font-body);font-size:.7rem;font-weight:600;letter-spacing:.04em;color:var(--color-muted)}.harvest-pinyin,.harvest-word{white-space:normal;overflow-wrap:anywhere}}@media (min-width:720px){.history-card{padding:var(--space-lg) var(--space-xl) var(--space-lg) calc(var(--space-xl) + 4px)}.script-sheet{padding:var(--space-xxl) var(--space-xl);gap:var(--space-sm)}.script-line{padding:var(--space-sm) 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th:last-child{border-top-right-radius:var(--radius-lg)}.admin-table tbody td{padding:14px var(--space-md);border-bottom:1px solid var(--color-hairline-soft);color:var(--color-body);vertical-align:middle}.admin-table tbody tr{transition:background-color .12s ease}.admin-table tbody tr:hover{background:var(--color-surface-soft)}.admin-table tbody tr:last-child td{border-bottom:none}.admin-cell-email{color:var(--color-ink);font-weight:500}.admin-cell-date{white-space:nowrap;color:var(--color-muted)}.admin-cell-action{text-align:right;white-space:nowrap}.admin-student-name{display:block;color:var(--color-ink);font-weight:500;font-size:.95rem}.admin-student-email{display:block;font-size:.78rem;margin-top:2px}.admin-stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));grid-gap:var(--space-md);gap:var(--space-md)}.admin-stat{display:flex;flex-direction:column;gap:var(--space-xs);padding:var(--space-lg) var(--space-md);border:1px solid 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h2{margin:0}.card-kind-tag{display:inline-flex;align-items:center;gap:6px;align-self:flex-start;font-family:var(--font-body);font-size:.68rem;font-weight:600;letter-spacing:.1em;text-transform:none;padding:4px 11px 4px 9px;border-radius:var(--radius-pill);white-space:nowrap}.card-kind-tag:before{content:"";width:7px;height:7px;border-radius:var(--radius-pill);flex:none}.card-kind-tag-admin{background:color-mix(in srgb,var(--color-ink) 6%,var(--color-canvas));color:var(--color-body-strong);border:1px solid color-mix(in srgb,var(--color-ink) 16%,transparent)}.card-kind-tag-admin:before{background:var(--color-ink)}.card-kind-tag-reference{background:transparent;color:var(--color-muted);border:1px solid var(--color-hairline)}.card-kind-tag-reference:before{background:transparent;box-shadow:inset 0 0 0 1.5px var(--color-muted-soft)}.display-name-section{border-left:3px solid color-mix(in srgb,var(--color-ink) 22%,var(--color-hairline))}.display-name-email{display:inline;font-family:var(--font-pinyin);font-size:.95em;color:var(--color-body-strong);background:color-mix(in srgb,var(--color-ink) 5%,var(--color-canvas));border:1px solid var(--color-hairline);border-radius:var(--radius-sm);padding:1px 6px;letter-spacing:.01em;white-space:nowrap}[data-testid=display-name-form] [data-testid=display-name-result]{max-width:480px}.nickname-reference-section{background:var(--color-surface-soft);border-color:var(--color-hairline-soft);border-left:3px solid var(--color-hairline)}.nickname-reference-lead{max-width:64ch;font-size:.86rem;line-height:1.6}.nickname-reference-grid{grid-template-columns:repeat(auto-fit,minmax(220px,.5fr));gap:var(--space-md)}.nickname-stat{background:color-mix(in srgb,var(--color-canvas) 55%,var(--color-surface-soft));border:1px solid var(--color-hairline-soft);border-radius:var(--radius-md);padding:var(--space-md) var(--space-md) var(--space-lg)}.nickname-stat 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var(--color-hairline)}.profile-card-cream{background:var(--color-surface-card);border-color:var(--color-hairline-soft)}.profile-card-usage{background:var(--color-surface-soft);border-color:var(--color-hairline-soft);border-left:3px solid var(--color-ink)}.profile-card-head{display:flex;flex-direction:column;gap:var(--space-xxs);padding-bottom:var(--space-sm);margin-bottom:var(--space-xs);border-bottom:1px solid var(--color-hairline)}.profile-eyebrow{font-family:var(--font-body);font-size:.68rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--color-muted)}.profile-card-title{font-size:1.375rem;font-weight:500;line-height:1.3;letter-spacing:-.01em;margin:0}.profile-list{margin:0;display:flex;flex-direction:column}.profile-row{display:grid;grid-template-columns:1fr;grid-gap:var(--space-xxs) var(--space-lg);gap:var(--space-xxs) var(--space-lg);padding:var(--space-md) 0;border-bottom:1px solid var(--color-hairline-soft)}.profile-row:first-child{padding-top:var(--space-xs)}.profile-row:last-child{border-bottom:0;padding-bottom:var(--space-xs)}.profile-row dt{margin:0;font-size:.8rem;font-weight:600;letter-spacing:.03em;color:var(--color-muted)}.profile-row dd{margin:0;font-size:1.0625rem;line-height:1.4;color:var(--color-body-strong);overflow-wrap:anywhere}.profile-figure{font-size:1.375rem;font-weight:600;color:var(--color-ink);font-feature-settings:"tnum";font-variant-numeric:tabular-nums;letter-spacing:-.01em}.profile-row dd 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var(--color-primary-active);outline-offset:3px}.vocab-fab-plus{font-size:1.7rem;font-weight:600;line-height:1;margin-top:-2px}.vocab-add-overlay{position:fixed;inset:0;z-index:1000;display:flex;align-items:center;justify-content:center;padding:4vh 16px;background:rgba(20,20,19,.55);overflow-y:auto}.vocab-add-modal{width:100%;max-width:520px;background:var(--color-canvas);border:1px solid var(--color-hairline);border-radius:var(--radius-lg);box-shadow:0 18px 48px rgba(20,20,19,.28);display:flex;flex-direction:column;max-height:92vh;overflow-y:auto;padding:var(--space-xl);gap:var(--space-md)}.vocab-add-modal-header{display:flex;align-items:center;justify-content:space-between;gap:var(--space-md)}.vocab-add-modal-title{margin:0;font-family:var(--font-display);font-size:1.05rem;font-weight:600;letter-spacing:-.01em;color:var(--color-ink)}.vocab-add-close{flex:none;width:34px;height:34px;min-height:0;padding:0;font-size:1.3rem;line-height:1;border:1px solid var(--color-hairline);border-radius:50%;background:transparent;color:var(--color-muted);cursor:pointer;transition:background .15s ease,color .15s ease,border-color .15s ease}.vocab-add-close:hover{background:var(--color-surface-soft);border-color:var(--color-muted-soft);color:var(--color-ink)}.vocab-add-close:focus-visible{outline:2px solid var(--color-ink);outline-offset:2px}.vocab-add-form{display:flex;flex-direction:column;gap:var(--space-md)}.vocab-add-fields{display:grid;grid-template-columns:1fr;grid-gap:var(--space-md);gap:var(--space-md);align-items:end}.vocab-field{display:flex;flex-direction:column;gap:var(--space-xxs);margin-bottom:0;text-transform:none;letter-spacing:0}.vocab-field-label{font-size:.74rem;font-weight:600;letter-spacing:.04em;color:var(--color-muted)}.vocab-add-actions{display:flex;align-items:center;gap:var(--space-md);flex-wrap:wrap;margin-top:var(--space-xxs)}.vocab-add-actions 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16px;font-size:.86rem}.drill-ask{margin-top:16px;padding:var(--space-md) var(--space-lg);background:#eef2f1;border:1px solid #d6e1de;border-left:4px solid var(--color-accent-teal);border-radius:var(--radius-lg)}.drill-ask-head{display:flex;align-items:center;gap:var(--space-xs);margin-bottom:6px}.drill-ask-icon{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:var(--radius-pill);background:var(--color-accent-teal);color:#ffffff;font-size:.9rem;font-weight:700;line-height:1}.drill-ask-title{font-size:.86rem;font-weight:700;letter-spacing:.02em;color:#2c5750}.drill-ask-hint{margin:0 0 10px;font-size:.8rem;line-height:1.6;color:var(--color-muted)}.drill-ask-form{display:flex;flex-direction:column;gap:8px}.drill-ask-input{width:100%;box-sizing:border-box;padding:10px 12px;font-size:.95rem;line-height:1.6;color:var(--color-body-strong);background:#ffffff;border:1px solid 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16px;border:none;background:transparent;color:var(--color-muted-soft);font-family:var(--font-body);font-size:.82rem;font-weight:600;line-height:1;cursor:pointer;white-space:nowrap;transition:background .15s ease,color .15s ease}.drill-status-btn+.drill-status-btn{border-left:1px solid var(--color-hairline)}.drill-status-btn:hover:not(:disabled):not(.drill-status-btn--active){background:var(--color-surface-soft);color:var(--color-body-strong)}.drill-status-btn:focus-visible{outline:2px solid var(--color-body-strong);outline-offset:-2px}.drill-status-btn:disabled{cursor:default}.drill-status-btn--active{background:var(--color-surface-dark);color:var(--color-on-dark);cursor:default}.drill-status-group[data-status=reviewing] .drill-status-btn--active{background:var(--color-warning);color:#2b2410}.drill-status-group[data-status=mastered] 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(max-width:560px){.drill-overlay{padding:0;align-items:stretch;background:rgba(20,20,19,.6)}.drill-panel{max-width:none;width:100%;max-height:100vh;max-height:100dvh;height:100dvh;border:none;border-radius:0;box-shadow:none}.drill-header{padding:16px 18px}.drill-body{padding:18px 16px calc(22px + env(safe-area-inset-bottom, 0px));gap:22px}.drill-compose-actions{flex-direction:column;align-items:stretch}.drill-mic-btn,.drill-submit{width:100%;margin-left:0;justify-content:center}.drill-status-group{display:flex;width:100%}.drill-status-btn{flex:1 1;padding:12px 8px}}.history-toolbar{display:flex;flex-wrap:wrap;align-items:center;gap:var(--space-sm)}.history-search{flex:1 1 280px;min-width:0}.history-favorite-filter{width:auto;flex:0 0 auto;min-height:44px;padding:0 16px;display:inline-flex;align-items:center;gap:6px;border:1px solid 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var(--space-xl);padding:0;list-style:none;counter-reset:onb;max-width:520px;width:100%}.onboarding-steps li{counter-increment:onb;position:relative;flex:1 1;min-width:0;display:flex;flex-direction:column;align-items:center;gap:var(--space-xs);text-align:center;font-size:12px;line-height:1.3;font-weight:500;letter-spacing:.01em;color:var(--color-muted-soft);white-space:nowrap}.onboarding-steps li:before{content:counter(onb);position:relative;z-index:1;display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:var(--radius-pill);background:var(--color-canvas);border:1.5px solid var(--color-hairline);color:var(--color-muted);font-size:13px;font-weight:600;font-feature-settings:"tnum";font-variant-numeric:tabular-nums;transition:background-color .2s ease,border-color .2s ease,color .2s ease}.onboarding-steps li:after{content:"";position:absolute;top:15px;left:calc(50% + 15px);width:calc(100% - 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