:root,[data-theme=forest]{color-scheme:light;--bg: #f8f9f5;--sidebar: #eff3e9;--panel: #fff;--panel-soft: #f4f7ef;--ink: #2c3b31;--muted: #879084;--faint: #a3aa9d;--line: #e6eadf;--accent: #54764b;--accent-deep: #3f603a;--accent-soft: #e8f0df;--highlight: #a5bd89;--orange: #bc8a54;--orange-soft: #faf1e3;--purple: #8d7ca1;--purple-soft: #f1edf7;--blue: #7394a6;--blue-soft: #edf4f7;--radius: 18px;--shadow: 0 6px 26px #354c3510;--scene-ground: #dce7ce;--scene-fill: #e9eedf;--theme-gradient: radial-gradient( ellipse at 85% 10%, #ecf1df80, transparent 60% );--body-font: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;font-family:var(--body-font);color:var(--ink);background:var(--bg);font-synthesis:none;text-rendering:optimizeLegibility}[data-theme=space]{color-scheme:dark;--bg: #191c30;--sidebar: #202239;--panel: #252940;--panel-soft: #2c2e49;--ink: #e9e7f7;--muted: #aaa8c5;--faint: #84829f;--line: #383950;--accent: #b2a0ea;--accent-deep: #c3b4f2;--accent-soft: #37304f;--highlight: #ceb3f0;--orange: #e0bd86;--orange-soft: #3c3340;--purple: #c1a2e6;--purple-soft: #3b2e50;--blue: #9bbde3;--blue-soft: #293a52;--radius: 19px;--shadow: 0 8px 25px #0b0e211b;--scene-ground: #4a446e;--scene-fill: #34304e;--theme-gradient: radial-gradient( ellipse at 85% 8%, #57417030, transparent 60% )}[data-theme=pixel]{color-scheme:light;--bg: #faf8f0;--sidebar: #edf2ed;--panel: #fffef7;--panel-soft: #f4f3e8;--ink: #364553;--muted: #7b8790;--faint: #a4aaab;--line: #dfe4db;--accent: #397e9d;--accent-deep: #286c8e;--accent-soft: #e0eff4;--highlight: #8dc2d5;--orange: #c98969;--orange-soft: #faebe2;--purple: #9785b0;--purple-soft: #f0eafa;--blue: #558fa8;--blue-soft: #e6f1f6;--radius: 7px;--shadow: 3px 3px 0 #d9e3df;--scene-ground: #d9e7df;--scene-fill: #e6efe8;--theme-gradient: linear-gradient(135deg, #dceff020, transparent)}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{color:inherit;cursor:pointer}button{border:0;background:none}button:disabled{cursor:not-allowed;opacity:.48}button:not(:disabled),a,input,select,textarea{transition:background .16s,border-color .16s,box-shadow .16s}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:3px solid var(--highlight);outline-offset:3px}a{color:var(--accent)}button svg{flex-shrink:0}h1,h2,h3,p{margin-top:0}button,input,select,textarea{min-width:0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.muted,.subtle{color:var(--muted)}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.mobile-only{display:none!important}.icon-button{width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;padding:0;border-radius:9px;color:var(--muted);flex-shrink:0}.icon-button:hover{background:var(--accent-soft);color:var(--accent)}.button{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;padding:11px 19px;border:1px solid transparent;border-radius:calc(var(--radius) - 6px);font-size:14px;font-weight:600;line-height:1.4;text-decoration:none;white-space:nowrap}.button.primary{background:var(--accent);color:var(--panel)}.button.primary:not(:disabled):hover{background:var(--accent-deep)}[data-theme=space] .button.primary{color:#232138}.button.secondary{background:var(--panel);border-color:var(--line);color:var(--ink)}.button.secondary:hover{border-color:var(--highlight);background:var(--panel-soft)}.button.subtle:hover{background:var(--panel-soft)}.button.small{font-size:12px;min-height:36px;padding:8px 13px}.text-button{display:inline-flex;align-items:center;gap:5px;padding:7px 0;color:var(--accent);font-size:13px;font-weight:550;min-height:32px}.text-button:hover{text-decoration:underline;text-underline-offset:4px}.pill{display:inline-flex;padding:5px 9px;border-radius:8px;font-size:11px;white-space:nowrap}.pill.green{color:var(--accent);background:var(--accent-soft)}.pill.orange{color:var(--orange);background:var(--orange-soft)}.pill.neutral{color:var(--muted);background:var(--panel-soft)}.app{min-height:100vh;background:var(--theme-gradient),var(--bg);color:var(--ink)}.sidebar{position:fixed;inset:0 auto 0 0;width:254px;background:var(--sidebar);border-right:1px solid var(--line);padding:29px 19px 0;display:flex;flex-direction:column;z-index:30}.brand{display:flex;align-items:center;gap:10px;text-align:left;font-size:20px;font-weight:750;letter-spacing:.04em;padding:0 8px;color:var(--ink);min-height:44px}.brand-symbol{height:38px;width:38px;display:grid;place-items:center;border-radius:13px;background:var(--accent);color:var(--sidebar);transform:rotate(-5deg);flex-shrink:0}.brand-symbol svg{transform:rotate(5deg)}.brand small{display:block;font-size:8px;font-weight:550;letter-spacing:.15em;margin-top:4px;color:var(--muted)}.primary-nav{display:flex;flex-direction:column;gap:7px;margin-top:33px}.primary-nav>button{display:flex;align-items:center;gap:12px;min-height:45px;padding:11px 14px;border-radius:calc(var(--radius) - 6px);text-align:left;font-size:14px;color:var(--muted);font-weight:550}.primary-nav>button:hover,.primary-nav>button.selected{color:var(--accent);background:var(--accent-soft)}.primary-nav>button.new-study{color:var(--panel);background:var(--accent);box-shadow:0 4px 10px #3c603714;margin-bottom:10px}.primary-nav>button.new-study:hover{background:var(--accent-deep)}[data-theme=space] .new-study{color:#242339!important}.keycap{font-size:16px;margin-left:auto;opacity:.65}.nav-hint{font-size:9px;font-weight:400;margin-left:auto;opacity:.65;letter-spacing:.06em}.subject-section-label{display:flex;align-items:center;justify-content:space-between;margin:30px 6px 10px 13px;font-size:11px;color:var(--muted);letter-spacing:.12em}.subject-section-label .icon-button{height:24px;width:24px}.subject-nav{overflow-y:auto;min-height:0;max-height:calc(100vh - 470px);scrollbar-width:thin;scrollbar-color:var(--line) transparent}.subject-group{margin-bottom:4px}.subject-row{display:flex;align-items:center;min-height:42px;border-radius:10px;color:var(--muted)}.subject-row.current{color:var(--ink);background:var(--panel-soft)}.subject-main{display:flex;align-items:center;gap:11px;min-height:42px;padding:8px 11px;flex:1;text-align:left;font-size:13px}.subject-main>span:nth-child(2){flex:1}.subject-main>svg{color:var(--faint);transition:transform .2s}.subject-main>svg.rotated{transform:rotate(-90deg)}.subject-letter{display:inline-grid;place-items:center;width:24px;height:25px;border-radius:7px;border:1px solid var(--line);background:var(--panel);font-family:Georgia,PingFang SC,sans-serif;font-weight:550;font-size:12px;color:var(--accent);flex-shrink:0}.subject-edit{width:25px;height:28px;margin-right:3px;opacity:0}.subject-row:hover .subject-edit,.subject-edit:focus-visible{opacity:1}.session-links{margin:0 5px 4px 24px;padding:2px 0 2px 11px;border-left:1px solid var(--line)}.session-links button{display:flex;align-items:center;gap:7px;width:100%;text-align:left;min-height:33px;padding:7px 8px;color:var(--muted);font-size:11px;border-radius:7px}.session-links button>span{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.session-links button.active,.session-links button:hover{color:var(--accent);background:var(--accent-soft)}.session-links .subtle{font-size:10px}.add-subject{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);padding:13px;min-height:44px;text-align:left}.add-subject:hover{color:var(--accent)}.sidebar-note{position:relative;display:flex;align-items:flex-start;gap:10px;padding:18px 13px;margin:24px 2px 18px;color:var(--muted);border:1px dashed #ccd5bf;border-radius:calc(var(--radius) - 4px);background:var(--panel-soft);overflow:hidden}.sidebar-note p{font-size:11px;line-height:1.8;margin:0}.little-leaf{color:var(--orange);font-size:20px}.note-plant{position:absolute;right:7px;bottom:3px;font-size:60px;line-height:1;opacity:.18;transform:rotate(-35deg);color:var(--accent)}.sidebar-bottom{margin-top:auto;padding-top:11px;border-top:1px solid var(--line)}.sidebar-bottom>button{display:flex;align-items:center;gap:11px;width:100%;padding:10px 12px;min-height:42px;font-size:12px;color:var(--muted);border-radius:9px}.sidebar-bottom>button:hover,.sidebar-bottom>button.selected{color:var(--accent);background:var(--accent-soft)}.theme-tiny{margin-left:auto;font-size:9px;color:var(--faint)}.profile{display:flex;align-items:center;gap:10px;border-top:1px solid var(--line);margin-top:12px;padding:18px 6px 20px}.avatar{display:inline-grid;place-items:center;width:36px;height:36px;color:var(--accent);background:#dae6ce;border:3px solid var(--panel);border-radius:50%;font-size:14px;font-weight:650;flex-shrink:0}[data-theme=space] .avatar{background:#51436c}.avatar.small{width:32px;height:32px;font-size:12px}.profile>div{flex:1;min-width:0}.profile strong{display:block;font-size:12px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.main{margin-left:254px;min-height:100vh}.topbar{position:relative;z-index:20;min-height:73px;padding:0 39px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--bg)}.breadcrumb{display:flex;align-items:center;gap:10px;font-size:12px;min-width:0;color:var(--muted)}.status-dot{display:block;width:6px;height:6px;background:var(--highlight);border-radius:50%;box-shadow:0 0 0 3px var(--accent-soft)}.session-title{display:flex;align-items:center;gap:8px;color:var(--faint);font-size:11px;max-width:290px;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.session-title svg{opacity:0}.session-title:hover svg{opacity:1}.topbar-right{display:flex;align-items:center;gap:20px}.local-status{font-size:10px;color:var(--faint);letter-spacing:.04em}.notification-button{position:relative}.notification-button i{position:absolute;right:6px;top:5px;width:5px;height:5px;border:1px solid var(--bg);border-radius:50%;background:var(--orange)}.notification-popover{position:absolute;right:30px;top:62px;width:340px;max-width:90vw;padding:16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);max-height:70vh;overflow:auto}.popover-heading{display:flex;justify-content:space-between;margin-bottom:14px;font-size:13px}.popover-heading>span{font-size:11px;color:var(--muted)}.notification-popover>p{font-size:12px;line-height:1.8}.notification-popover>button{display:flex;align-items:flex-start;gap:9px;width:100%;text-align:left;padding:13px 3px;border-top:1px solid var(--line)}.notification-popover button div{flex:1}.notification-popover strong{font-size:12px;font-weight:550;line-height:1.6}.notification-popover small{display:block;font-size:10px;color:var(--muted);margin-top:3px}.notice-dot{width:6px;height:6px;background:var(--orange);border-radius:50%;margin-top:7px}.read .notice-dot{background:var(--line)}.toast{position:fixed;top:85px;left:calc(50% + 110px);transform:translate(-50%);z-index:90;display:flex;align-items:center;gap:9px;width:max-content;max-width:calc(100vw - 40px);padding:9px 13px;border:1px solid var(--orange);border-radius:12px;background:var(--panel);color:var(--ink);box-shadow:var(--shadow);font-size:13px;line-height:1.7}.toast>.icon-button{height:24px;width:24px}.toast>svg{color:var(--orange);flex-shrink:0}.learning-page{display:flex;flex-direction:column;min-height:calc(100vh - 73px)}.welcome{width:min(820px,calc(100% - 90px));margin:37px auto 25px;flex:1}.welcome-topline{display:flex;justify-content:space-between;align-items:center}.welcome-pill{display:inline-flex;align-items:center;gap:7px;border:1px solid var(--line);border-radius:20px;padding:6px 10px;font-size:10px;letter-spacing:.03em;color:var(--accent);background:var(--panel-soft)}.welcome-date{color:var(--faint);font-size:10px;letter-spacing:.03em}.welcome-hero{display:flex;align-items:center;justify-content:space-between;gap:22px;padding:31px 0 30px;min-height:290px}.hello{font-size:13px;color:var(--muted);margin:0 0 13px;letter-spacing:.02em}.hello span{color:#c99d62;margin-left:5px;font-size:17px}.welcome-hero h1{font-size:clamp(30px,3vw,43px);line-height:1.35;letter-spacing:.02em;font-weight:650;margin:0 0 18px}.welcome-hero h1 span{color:var(--accent);position:relative}.welcome-hero h1 span:after{content:"";height:7px;position:absolute;left:0;bottom:-3px;right:0;border-radius:50%;background:var(--highlight);opacity:.18;transform:rotate(-2deg)}.hero-subtitle{font-size:12px;color:var(--muted);line-height:1.9;letter-spacing:.02em;margin:0}.hero-scene{position:relative;width:270px;height:240px;display:grid;place-items:center;flex-shrink:0}.hero-scene:before{content:"";position:absolute;background:var(--scene-fill);width:210px;height:190px;transform:rotate(10deg);border-radius:46% 54% 55% 45%/52% 42% 58% 48%;opacity:.65}.mascot{position:relative;width:260px;max-width:100%;height:auto}.mascot.small{width:105px}.scene-orbit{position:absolute;inset:13px 0;border:1px dashed var(--line);border-radius:50%;transform:rotate(-18deg)}.scene-chip{position:absolute;bottom:4px;left:52px;display:flex;align-items:center;gap:6px;padding:8px 12px;border:1px solid var(--line);border-radius:22px;background:var(--panel);font-size:9px;color:var(--accent);transform:rotate(-4deg);box-shadow:var(--shadow);white-space:nowrap}.scene-star{position:absolute;top:18px;left:17px;font-size:27px;color:var(--orange)}.welcome-actions-header{display:flex;align-items:center;justify-content:space-between;margin:5px 0 16px}.welcome-actions-header>span:first-child{font-size:12px;color:var(--ink);font-weight:550}.welcome-actions-header>span:last-child{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--faint)}.quick-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.quick-card{display:flex;align-items:center;text-align:left;gap:13px;padding:19px 17px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 2px 3px #354c3502}.quick-card:hover{border-color:var(--highlight);box-shadow:var(--shadow);transform:translateY(-1px)}.quick-icon{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:13px;flex-shrink:0}.quick-icon.green{color:var(--accent);background:var(--accent-soft)}.quick-icon.orange{color:var(--orange);background:var(--orange-soft)}.quick-icon.purple{color:var(--purple);background:var(--purple-soft)}.quick-icon.blue{color:var(--blue);background:var(--blue-soft)}.quick-card h3{margin:0 0 6px;font-weight:600;font-size:13px}.quick-card p{margin:0;color:var(--muted);font-size:10px;line-height:1.6}.card-arrow{margin-left:auto;color:var(--faint);width:14px}.composer-dock{position:sticky;bottom:0;width:min(820px,calc(100% - 90px));margin:0 auto;padding:17px 0 14px;background:linear-gradient(transparent,var(--bg) 18px);z-index:10}.composer-card{border:1px solid #dce3d1;border-radius:var(--radius);background:var(--panel);box-shadow:0 6px 23px #4c67460b;overflow:hidden}.composer-card:focus-within{border-color:var(--highlight);box-shadow:0 0 0 3px var(--accent-soft)}.composer-card>textarea{display:block;border:0!important;outline:none!important;resize:vertical;width:100%;max-height:220px;min-height:73px;padding:20px 20px 9px;background:none;color:var(--ink);font-size:13px;line-height:1.8;box-shadow:none}.composer-card>textarea::placeholder{color:var(--faint)}.composer-footer{display:flex;align-items:center;justify-content:space-between;padding:6px 13px 12px 14px}.composer-footer>div{display:flex;align-items:center;gap:10px}.composer-footer .icon-button{height:30px;width:30px}.composer-divider{height:14px;width:1px;background:var(--line);margin:0 1px}.composer-subject{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:10px}.composer-subject select{border:0;background:none;padding:5px 2px;color:var(--muted);font-size:10px;appearance:none;max-width:100px;outline:none}.composer-subject select:disabled{opacity:.8}.send-button{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--accent);color:var(--panel);flex-shrink:0}.send-button:disabled{background:var(--panel-soft);color:var(--faint);opacity:1}.send-button.stop{background:var(--accent-soft);color:var(--accent)}.composer-note{display:flex;align-items:center;justify-content:center;gap:5px;margin:10px 0 0;font-size:9px;color:var(--faint);letter-spacing:.02em}.attachment-preview{display:flex;align-items:center;gap:10px;padding:12px 17px;border-bottom:1px solid var(--line)}.attachment-preview>img{height:50px;width:65px;object-fit:contain;border-radius:7px;border:1px solid var(--line)}.attachment-preview>div{flex:1;min-width:0}.attachment-preview strong{font-size:11px;font-weight:500;display:block;text-overflow:ellipsis;overflow:hidden;white-space:nowrap}.attachment-preview small{font-size:10px;color:var(--muted);display:block;margin-top:5px}.messages{flex:1;width:min(800px,calc(100% - 90px));margin:30px auto 0;padding-bottom:16px}.message{display:flex;gap:13px;margin:23px 0 36px;align-items:flex-start}.message.user{justify-content:flex-end;margin-bottom:30px}.message.user>.message-body{max-width:85%;padding:13px 18px;background:var(--accent-soft);border-radius:17px 17px 4px;font-size:14px}.message.assistant>.message-body{flex:1;min-width:0}.assistant-avatar{display:grid;place-items:center;height:32px;width:32px;background:var(--accent-soft);color:var(--accent);border:1px solid var(--line);border-radius:11px;flex-shrink:0}.assistant-name{font-weight:650;font-size:12px;min-height:28px;padding:4px 0 7px}.assistant-name>span{font-size:9px;margin-left:10px;color:var(--faint);font-weight:400}.markdown{font-size:14px;line-height:1.95;color:inherit;overflow-wrap:anywhere}.markdown p{margin:0 0 12px}.markdown p:last-child{margin-bottom:0}.markdown ul,.markdown ol{padding-left:22px}.markdown pre{overflow:auto;padding:13px;border-radius:9px;background:var(--panel-soft)}.markdown code{font-size:.88em}.markdown table{border-collapse:collapse;width:100%;display:block;overflow:auto}.markdown th,.markdown td{padding:8px;border:1px solid var(--line);font-size:12px;line-height:1.6}.markdown h1,.markdown h2,.markdown h3{font-size:1.13em;margin:16px 0 7px}.markdown blockquote{margin-left:0;padding:8px 14px;border-left:3px solid var(--highlight);background:var(--panel-soft)}.katex-display{overflow:auto hidden}.message-image{display:block;max-height:260px;max-width:min(380px,100%);border-radius:11px;margin:12px 0 0;border:1px solid var(--line)}.activity{display:flex;align-items:center;gap:9px;margin:10px 0 15px 45px;color:var(--muted);font-size:11px}.thinking-dots{display:flex;gap:3px}.thinking-dots i{display:block;width:4px;height:4px;border-radius:50%;background:var(--highlight);animation:pulse 1.2s infinite}.thinking-dots i:nth-child(2){animation-delay:.2s}.thinking-dots i:nth-child(3){animation-delay:.4s}@keyframes pulse{50%{opacity:.25;transform:translateY(-2px)}}.message-error,.inline-error{font-size:12px;color:#bc735a;line-height:1.8;margin:12px 0 0}.learning-card{margin:15px 0;padding:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}.card-kicker{display:flex;align-items:center;gap:6px;color:var(--accent);font-size:11px;font-weight:600;margin-bottom:13px}.card-kicker>span{color:var(--faint);margin-left:auto;font-size:10px;font-weight:400}.exercise-card form{display:flex;gap:9px;margin:16px 0 5px}.exercise-card input{flex:1;border:1px solid var(--line);padding:9px 12px;border-radius:9px;background:var(--bg);color:var(--ink);font-size:12px}.exercise-card>.text-button{font-size:11px}.verdict-text{display:block;font-size:11px;margin:8px 0;color:var(--orange)}.verdict-text.correct{color:var(--accent)}.solution{padding:16px;margin-top:14px;border-radius:10px;background:var(--panel-soft);font-size:13px}.solution>strong{font-size:11px;color:var(--accent);display:block;margin:4px 0 7px}.solution .markdown{font-size:13px;line-height:1.8}.grading-head{display:flex;align-items:center;gap:8px;color:var(--accent);margin-bottom:12px}.grading-head>span{display:grid;place-items:center;background:var(--accent-soft);border-radius:8px;width:29px;height:29px}.grading-head strong{font-size:13px}.grading-head small{margin-left:auto;color:var(--muted);font-size:10px}.grading-card.incorrect .grading-head,.grading-card.unclear .grading-head{color:var(--orange)}.grading-card.incorrect .grading-head>span,.grading-card.unclear .grading-head>span{background:var(--orange-soft)}.grading-card>p{font-size:12px;line-height:1.8;margin:10px 0}.saved-note{display:flex;align-items:center;gap:6px;font-size:10px;color:var(--muted);margin:12px 0 5px}.grading-card>.text-button{font-size:11px}.schedule-proposal h3{font-size:15px}.schedule-proposal>p{font-size:12px;color:var(--muted)}.schedule-proposal>small{display:block;margin-top:10px;font-size:10px}.content-page{max-width:1150px;padding:48px 45px 65px;margin:0 auto}.page-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:34px}.form-eyebrow{font-size:9px;letter-spacing:.15em;color:var(--muted);display:block;margin-bottom:13px}.page-heading h1{font-size:30px;line-height:1.5;font-weight:650;letter-spacing:.02em;margin:0 0 12px}.page-heading h1>span{color:var(--accent)}.page-heading p{color:var(--muted);font-size:12px;line-height:1.8;margin:0}.count-badge{display:flex;flex-direction:column;gap:3px;align-items:center;padding:15px 20px;background:var(--accent-soft);border:1px solid var(--line);border-radius:var(--radius);white-space:nowrap}.count-badge strong{font-size:28px;font-weight:650;color:var(--accent)}.count-badge span{font-size:10px;color:var(--muted)}.book-toolbar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:32px}.filter-tabs{display:flex;gap:5px;flex-wrap:wrap}.filter-tabs button{min-height:34px;padding:8px 11px;border-radius:8px;color:var(--muted);font-size:11px}.filter-tabs button.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.search-field{display:flex;align-items:center;gap:8px;max-width:200px;padding:8px 12px;background:var(--panel);border:1px solid var(--line);border-radius:10px;color:var(--muted)}.search-field input{background:none;border:0;outline:none;width:100%;color:var(--ink);font-size:11px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:75px 25px;text-align:center;border:1px dashed var(--line);border-radius:var(--radius);background:var(--panel);color:var(--accent)}.empty-state>svg{padding:9px;box-sizing:content-box;background:var(--accent-soft);border-radius:16px;margin-bottom:20px}.empty-state h2{font-size:17px;color:var(--ink);font-weight:600;margin:0 0 11px}.empty-state p{font-size:12px;color:var(--muted);line-height:1.9;margin:0 0 18px}.empty-state.compact{border:0;padding:40px 20px}.mistake-group{margin-top:30px}.group-heading{display:flex;align-items:center;gap:9px;margin-bottom:15px}.group-heading h2{font-size:15px;margin:0}.group-heading small{margin-left:auto;font-size:11px;color:var(--muted)}.mistakes-grid{display:grid;grid-template-columns:1fr 1fr;gap:17px}.mistake-card{padding:21px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.mistake-date{display:flex;justify-content:space-between;align-items:center;gap:9px;margin-bottom:16px;font-size:10px}.mistake-date>span{color:var(--orange);background:var(--orange-soft);border-radius:6px;padding:5px 7px}.mistake-date time{color:var(--faint);font-size:9px}.mistake-photo{display:block;width:100%;max-height:210px;object-fit:contain;border:1px solid var(--line);border-radius:9px;margin-bottom:15px}.mistake-card .markdown{font-size:13px}.mistake-card>p.muted{font-size:11px;margin-top:13px;line-height:1.7}.mistake-actions{display:flex;align-items:center;flex-wrap:wrap;gap:12px;padding-top:5px}.mistake-actions .text-button{font-size:11px}.mistake-actions>select{margin-left:auto;width:90px;font-size:10px;padding:6px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--muted)}.info-banner{display:flex;align-items:flex-start;gap:12px;padding:15px 19px;border:1px solid var(--line);background:var(--panel-soft);border-radius:12px;color:var(--accent);font-size:12px;line-height:1.7;margin-bottom:26px}.info-banner>svg{margin-top:2px;flex-shrink:0}.info-banner small{display:block;color:var(--muted);font-size:10px;margin-top:3px}.task-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.task-card{padding:22px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.task-card.paused{opacity:.72}.task-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:21px}.task-subject{font-size:10px;color:var(--muted)}.task-card h3{font-size:15px;font-weight:600;line-height:1.6;margin:6px 0 18px}.task-time{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:12px;margin:0 0 5px}.task-time strong{font-size:18px;margin-left:auto;color:var(--ink)}.task-card>small{font-size:9px;color:var(--faint)}.task-next{font-size:10px;color:var(--muted);padding:18px 0;border-bottom:1px solid var(--line);line-height:1.7}.task-actions{display:flex;justify-content:space-between;gap:10px;padding-top:9px}.task-actions button{font-size:10px;gap:3px}.history-section{margin-top:40px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:22px}.section-heading h2{font-size:16px;font-weight:600;margin:0}.section-heading>small{font-size:10px;color:var(--muted)}.section-heading p{font-size:11px;color:var(--muted);margin:8px 0 0;line-height:1.8}.table-wrap{width:100%;overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:var(--panel)}table{width:100%;border-collapse:collapse;text-align:left;white-space:normal}th{padding:13px 17px;font-size:10px;font-weight:500;color:var(--muted);background:var(--panel-soft)}td{padding:15px 17px;font-size:12px;border-top:1px solid var(--line);line-height:1.6;vertical-align:middle}td .text-button{font-size:11px;white-space:nowrap}.job-error{display:block;font-size:10px;color:var(--orange);margin-top:6px;max-width:360px}.table-student{display:flex;align-items:center;gap:8px}.table-student strong{font-weight:550;font-size:12px}.settings-section{margin-bottom:30px}.theme-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.theme-card{padding:0;text-align:left;background:var(--panel);border:2px solid var(--line);border-radius:var(--radius);overflow:hidden;position:relative;color:var(--ink)}.theme-card.chosen{border-color:var(--accent);box-shadow:var(--shadow)}.theme-card:hover{transform:translateY(-2px)}.theme-preview{position:relative;height:170px;display:flex;align-items:center;justify-content:center;background:var(--bg);overflow:hidden;border-bottom:1px solid var(--line)}.theme-preview .mascot{width:170px;margin-left:25px;margin-top:13px}.mini-sidebar{position:absolute;left:0;top:0;bottom:0;width:39px;background:var(--sidebar);border-right:1px solid var(--line);padding:20px 8px}.mini-sidebar i{display:block;height:4px;margin-bottom:13px;background:var(--line);border-radius:2px}.mini-sidebar i:first-child{height:10px;background:var(--accent);margin-bottom:20px}.theme-tag{position:absolute;top:13px;left:51px;font-size:8px;color:var(--muted);letter-spacing:.08em}.theme-selected{position:absolute;right:10px;top:10px;display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--accent);color:var(--panel)}.theme-info{padding:17px}.theme-info strong{font-size:14px;font-weight:600}.theme-info p{color:var(--muted);font-size:10px;line-height:1.7;margin:7px 0 13px}.color-swatches{display:flex;gap:5px}.color-swatches>i{width:11px;height:11px;border-radius:50%;background:var(--accent)}.color-swatches>i:nth-child(2){background:var(--highlight)}.color-swatches>i:nth-child(3){background:var(--orange)}.settings-panel{display:flex;gap:19px;padding:25px;margin-top:20px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.settings-icon{display:grid;place-items:center;flex-shrink:0;width:40px;height:40px;border-radius:12px;background:var(--panel-soft);color:var(--accent)}.settings-body{flex:1;min-width:0}.settings-body h2{font-size:15px;font-weight:600;margin:2px 0 9px}.settings-body>p{font-size:12px;line-height:1.8;color:var(--muted);margin-bottom:17px}.settings-body>small{display:block;font-size:10px;line-height:1.8;margin-top:12px}.settings-body form{max-width:500px}.settings-footnote{display:flex;align-items:flex-start;gap:10px;color:var(--muted);margin-top:25px;padding:0 5px}.settings-footnote>svg{flex-shrink:0;margin-top:3px}.settings-footnote p{font-size:10px;line-height:1.9;margin:0}.archive-list{margin-top:10px}.archive-list>div{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-top:1px solid var(--line);font-size:12px}.admin-badge{display:flex;align-items:center;gap:7px;color:var(--accent);font-size:10px;white-space:nowrap}.admin-tabs{display:flex;gap:10px;margin-bottom:25px;border-bottom:1px solid var(--line)}.admin-tabs>button{display:flex;align-items:center;gap:8px;font-size:12px;color:var(--muted);padding:13px 17px;border-bottom:2px solid transparent}.admin-tabs>button.active{color:var(--accent);border-color:var(--accent)}.admin-panel{padding:27px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius)}.model-panel{max-width:820px}.model-security{display:flex;align-items:center;gap:9px;padding:14px;background:var(--panel-soft);border-radius:10px;color:var(--muted);font-size:11px;line-height:1.7}.model-security>svg{color:var(--accent);flex-shrink:0}.success-banner{display:flex;align-items:center;gap:9px;padding:14px;border:1px solid var(--line);border-radius:9px;color:var(--accent);background:var(--accent-soft);font-size:12px;margin-top:16px}.field{display:flex;flex-direction:column;gap:9px;font-size:12px;font-weight:550;color:var(--ink);margin:0 0 20px}.field input,.field select{width:100%;min-height:44px;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font-size:13px;font-weight:400;color:var(--ink);background:var(--bg);outline-offset:2px}.field input::placeholder{color:var(--faint);font-size:11px}.field input:disabled{color:var(--muted);opacity:.8}.field small{font-size:10px;font-weight:400;color:var(--muted);line-height:1.8}.form-row{display:flex;gap:17px}.form-row>.field{flex:1;min-width:0}.form-help{font-size:11px!important;line-height:1.9;color:var(--muted);margin:0 0 20px}.form-actions{display:flex;gap:10px;justify-content:flex-end;align-items:center;margin-top:23px}.weekday-field{font-size:12px;margin-bottom:20px}.weekday-field>div{display:flex;gap:9px;margin-top:11px}.weekday-field button{height:38px;width:38px;border:1px solid var(--line);border-radius:9px;background:var(--bg);font-size:12px}.weekday-field button.active{background:var(--accent);color:var(--panel);border-color:var(--accent)}.modal{border:1px solid var(--line);width:490px;max-width:calc(100vw - 30px);padding:27px;border-radius:var(--radius);background:var(--panel);color:var(--ink);box-shadow:0 25px 100px #17241a30;max-height:90vh;overflow:auto}.modal::backdrop{background:#16241950;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.modal-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:25px}.modal-heading h2{font-size:19px;font-weight:600;margin:0}.modal>p{font-size:13px;line-height:1.9}.modal .field:last-of-type{margin-bottom:10px}.login-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:var(--bg)}.login-art{position:relative;display:flex;flex-direction:column;background:var(--sidebar);padding:40px 55px;overflow:hidden}.login-art:before{content:"";position:absolute;width:600px;height:600px;border-radius:50%;border:1px solid var(--line);left:-290px;bottom:-240px}.login-art:after{content:"";position:absolute;width:500px;height:500px;border-radius:50%;border:1px dashed #ccd5c2;right:-210px;top:60px;opacity:.6;pointer-events:none}.login-hero{position:relative;z-index:1;display:flex;flex-direction:column;align-items:flex-start;justify-content:center;margin:auto 0;padding:50px 0 25px}.login-hero h1{font-size:clamp(28px,3vw,43px);line-height:1.55;letter-spacing:.02em;font-weight:650;margin:28px 0 16px}.login-hero h1>span{color:var(--accent)}.login-hero>p{font-size:13px;line-height:1.9;color:var(--muted);margin-bottom:20px}.login-hero>.mascot{width:270px;align-self:center}.login-footnote{font-size:11px;color:var(--muted);position:relative;z-index:1}.login-form-area{display:flex;align-items:center;justify-content:center;padding:50px 40px}.login-form{width:355px;max-width:100%}.login-form>.form-eyebrow{font-size:10px;margin-bottom:17px}.login-form h2{font-size:26px;font-weight:600;margin:0 0 12px;line-height:1.5}.login-form>p{font-size:12px;color:var(--muted);line-height:1.9;margin-bottom:30px}.login-form .field{margin-bottom:20px}.login-form .field input{background:var(--panel);min-height:48px}.login-submit{width:100%;margin-top:11px;min-height:48px;justify-content:space-between}.login-help{display:flex;gap:7px;align-items:center;font-size:10px;color:var(--muted);margin-top:24px;line-height:1.8}.login-help svg{flex-shrink:0}.loading-page{min-height:100vh;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:15px}.loading-page p{font-size:12px;color:var(--muted)}[data-theme=pixel] .quick-card,[data-theme=pixel] .composer-card,[data-theme=pixel] .learning-card,[data-theme=pixel] .task-card{border-width:2px;box-shadow:var(--shadow)}[data-theme=pixel] .brand-symbol,[data-theme=pixel] .quick-icon,[data-theme=pixel] .subject-letter,[data-theme=pixel] .icon-button,[data-theme=pixel] .send-button{border-radius:5px}[data-theme=pixel] .scene-orbit{border-radius:0;transform:rotate(0);border-style:dashed}[data-theme=pixel] .hero-scene:before{border-radius:4px;transform:rotate(0)}[data-theme=pixel] .welcome-hero h1{letter-spacing:.05em}[data-theme=space] .app{background-image:radial-gradient(circle at 82% 18%,#b3a0e431 1px,transparent 2px),radial-gradient(circle at 65% 5%,#f6df9d33 1px,transparent 2px),var(--theme-gradient);background-size:173px 143px,237px 231px,auto}[data-theme=space] .composer-card{border-color:#4c4565}[data-theme=space] .sidebar-note{border-color:#514a67}[data-theme=space] .scene-chip{border-color:#534669}@media(min-width:1450px){.welcome{margin-top:60px}.welcome-hero{min-height:325px}.quick-card{padding:22px}.composer-dock{padding-bottom:24px}}@media(max-width:1150px){.sidebar{width:225px;padding-left:14px;padding-right:14px}.main{margin-left:225px}.brand{font-size:18px;gap:8px}.brand small{font-size:7px}.brand-symbol{width:34px;height:34px}.topbar{padding:0 28px}.welcome,.messages,.composer-dock{width:calc(100% - 60px)}.hero-scene{width:230px;height:220px}.hero-scene .mascot{width:235px}.hero-scene:before{width:180px;height:170px}.scene-chip{left:34px}.welcome-hero h1{font-size:35px}.content-page{padding:38px 30px 55px}.task-grid{grid-template-columns:1fr 1fr}.theme-preview{height:150px}.theme-preview .mascot{width:145px}.theme-info{padding:13px}.theme-info p{font-size:9px}.quick-card{gap:10px;padding:17px 13px}.quick-card p{font-size:9px}.quick-icon{width:39px;height:39px}.card-arrow{width:12px}.sidebar-note{margin-top:15px}.subject-section-label{margin-top:22px}}@media(max-width:900px){.sidebar{width:205px;padding-left:10px;padding-right:10px}.main{margin-left:205px}.brand small{font-size:6px}.brand{font-size:17px}.sidebar-note{display:none}.subject-nav{max-height:calc(100vh - 425px)}.welcome-hero{min-height:270px;gap:8px}.welcome-hero h1{font-size:29px}.hero-scene{width:180px}.hero-scene .mascot{width:195px;max-width:none}.hero-scene:before{width:150px;height:155px}.scene-chip{font-size:7px;bottom:17px;left:12px}.hero-subtitle{font-size:11px}.quick-card{padding:15px 12px;gap:10px}.quick-icon{width:33px;height:35px;border-radius:10px}.quick-icon>svg{width:18px}.quick-card h3{font-size:11px}.quick-card p{font-size:9px}.quick-card>.card-arrow{display:none}.welcome-actions-header>span:last-child{font-size:9px}.page-heading h1{font-size:25px}.page-heading{gap:15px}.page-heading>.button{font-size:11px;padding:10px}.mistakes-grid{grid-template-columns:1fr}.theme-grid{gap:10px}.theme-preview{height:130px}.theme-preview .mascot{width:128px;margin-left:25px}.mini-sidebar{width:30px;padding:19px 6px}.theme-tag{left:40px;font-size:7px}.theme-info strong{font-size:12px}.theme-info p{font-size:9px}.theme-selected{width:20px;height:20px;right:7px;top:7px}.settings-panel{padding:20px;gap:13px}.task-card{padding:17px}.task-actions{gap:8px;flex-wrap:wrap}.session-title{max-width:150px}.login-art{padding:35px}.login-form-area{padding:40px 30px}.login-hero h1{font-size:30px}}@media(max-width:760px){.mobile-only{display:inline-flex!important}.sidebar{width:260px;transform:translate(-100%);transition:transform .2s;box-shadow:none;padding:25px 18px 0}.sidebar.open{transform:translate(0);box-shadow:10px 0 60px #17211b30}.sidebar .brand{font-size:19px;position:relative;padding-right:0}.sidebar .brand .mobile-only{margin-left:auto;width:25px}.sidebar-note{display:flex}.subject-nav{max-height:calc(100vh - 445px)}.drawer-scrim{position:fixed;inset:0;background:#15231f60;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:25}.main{margin-left:0}.topbar{min-height:61px;padding:0 18px}.breadcrumb{gap:8px}.breadcrumb .mobile-only{margin-left:-5px;margin-right:3px}.topbar-right{gap:9px}.learning-page{min-height:calc(100dvh - 61px)}.welcome,.messages,.composer-dock{width:calc(100% - 44px);max-width:650px}.welcome{margin-top:27px}.welcome-hero{min-height:260px;padding:25px 0}.welcome-hero h1{font-size:35px}.hero-scene{width:230px;height:215px}.hero-scene .mascot{width:230px}.hero-scene:before{width:180px;height:165px}.scene-chip{left:28px;bottom:5px;font-size:8px}.quick-card h3{font-size:13px}.quick-card p{font-size:10px}.quick-icon{width:39px;height:41px}.quick-card{padding:18px 14px}.content-page{padding:34px 23px 45px}.page-heading h1{font-size:27px}.theme-preview{height:160px}.theme-preview .mascot{width:165px}.theme-tag{font-size:8px}.theme-info strong{font-size:13px}.settings-panel{padding:22px}.toast{left:50%;top:70px}.session-title{max-width:220px}.login-page{grid-template-columns:1fr}.login-art{padding:23px 28px 18px}.login-art>.brand{font-size:18px}.login-art .brand-symbol{height:32px;width:32px}.login-hero{padding:25px 4px 15px}.login-hero>.welcome-pill,.login-hero>p,.login-footnote{display:none}.login-hero h1{font-size:25px;margin:0;position:relative;z-index:2;line-height:1.6}.login-hero>.mascot{position:absolute;right:-5px;width:170px;top:-18px}.login-form-area{padding:35px 28px 50px;align-items:flex-start}.login-form{width:430px}.login-form h2{font-size:24px}.login-form>p{margin-bottom:25px}.login-art:after{width:300px;height:300px;top:-80px}.admin-panel{padding:20px}.local-status{font-size:9px}.notification-popover{right:15px;top:55px}}@media(max-width:480px){.welcome,.messages,.composer-dock{width:calc(100% - 30px)}.welcome{margin-top:22px;margin-bottom:15px}.welcome-topline{gap:8px}.welcome-date{font-size:8px}.welcome-pill{font-size:9px;padding:5px 9px}.welcome-hero{min-height:232px;padding:21px 0 24px;position:relative}.welcome-hero>div:first-child{z-index:2;position:relative;max-width:70%}.welcome-hero h1{font-size:30px;margin-bottom:13px;line-height:1.45}.hello{font-size:11px;margin-bottom:9px}.hero-subtitle{font-size:10px;max-width:245px;line-height:1.8}.desktop-break{display:none}.hero-scene{position:absolute;right:0;top:28px;width:130px;height:180px;opacity:.9}.hero-scene .mascot{width:140px;left:0;top:7px}.hero-scene:before{height:140px;width:140px}.scene-chip{font-size:6px;bottom:6px;left:13px;padding:6px 7px}.scene-chip svg{width:10px}.scene-star{font-size:20px;top:6px;left:7px}.scene-orbit{inset:10px 0}.welcome-actions-header{margin-bottom:12px}.welcome-actions-header>span:first-child{font-size:11px}.welcome-actions-header>span:last-child{font-size:8px;gap:3px}.welcome-actions-header svg{width:10px}.quick-grid{gap:9px}.quick-card{align-items:flex-start;padding:15px 12px;display:block;position:relative;min-height:126px;border-radius:13px}.quick-card .quick-icon{width:31px;height:31px;border-radius:9px;margin-bottom:12px}.quick-card .quick-icon svg{width:17px}.quick-card h3{font-size:12px;margin-bottom:6px}.quick-card p{font-size:9px;line-height:1.6}.composer-dock{padding-top:12px;padding-bottom:10px}.composer-card>textarea{min-height:74px;font-size:13px;padding:15px 15px 5px}.composer-footer{padding:4px 10px 10px}.composer-note{font-size:8px;margin-top:9px;gap:4px}.composer-note svg{width:10px}.local-status{display:none}.session-title{max-width:145px;font-size:10px}.breadcrumb{font-size:11px;gap:7px}.topbar{padding:0 12px}.topbar .status-dot{display:none}.topbar-right{gap:4px}.content-page{padding:29px 16px 40px}.page-heading{align-items:flex-start;margin-bottom:25px;flex-wrap:wrap;gap:16px}.page-heading h1{font-size:25px;margin-bottom:10px;line-height:1.5}.page-heading p{font-size:11px}.form-eyebrow{font-size:8px;letter-spacing:.12em}.count-badge{padding:10px 12px;margin-left:auto}.count-badge strong{font-size:22px}.count-badge span{font-size:8px}.book-toolbar{flex-direction:column;align-items:stretch;gap:12px;margin-bottom:22px}.search-field{max-width:none}.filter-tabs{gap:3px}.filter-tabs button{font-size:10px;padding:7px 9px}.mistake-card{padding:17px}.mistake-date time{font-size:8px}.task-grid{grid-template-columns:1fr}.task-card{padding:21px}.task-actions{gap:15px}.task-actions button{font-size:11px}.task-card-top{margin-bottom:15px}.task-card h3{font-size:16px}.task-time strong{margin-left:6px;font-size:19px}.task-next{padding:15px 0}.info-banner{padding:13px;gap:9px;font-size:11px}.info-banner small{font-size:9px}.theme-grid{grid-template-columns:1fr}.theme-card{display:grid;grid-template-columns:45% 55%}.theme-preview{height:146px;border-bottom:0;border-right:1px solid var(--line)}.theme-preview .mascot{width:140px;margin-left:20px}.theme-info{display:flex;flex-direction:column;justify-content:center;padding:19px}.theme-info strong{font-size:14px}.theme-info p{font-size:10px;line-height:1.8;margin:8px 0 14px}.theme-tag{left:37px;font-size:7px;top:9px}.section-heading{gap:10px;margin-bottom:18px}.section-heading h2{font-size:14px}.section-heading .pill{font-size:8px}.settings-panel{padding:19px 16px;gap:11px}.settings-icon{width:31px;height:31px;border-radius:9px}.settings-icon svg{width:17px}.settings-body h2{font-size:14px;margin-top:6px}.settings-body>p{font-size:11px}.form-row{gap:12px}.field input,.field select{font-size:12px;padding:10px}.field{font-size:11px;gap:8px;margin-bottom:17px}.field input::placeholder{font-size:10px}.settings-body>small{font-size:9px}.settings-footnote p{font-size:9px}.admin-tabs{gap:0}.admin-tabs>button{font-size:11px;gap:6px;padding:13px 12px}.admin-tabs svg{width:15px}.admin-panel{padding:18px 14px}.admin-panel .section-heading{align-items:flex-start;flex-wrap:wrap}.section-heading p{font-size:10px}.model-panel .form-actions{flex-wrap:wrap;justify-content:stretch}.model-panel .form-actions button{flex:1;font-size:11px;padding:10px}.model-security{font-size:10px;padding:12px}.model-panel .form-row{flex-direction:column;gap:0}.admin-badge{font-size:9px}.table-wrap th,.table-wrap td{padding:12px;font-size:11px}.table-wrap td:nth-child(2){min-width:100px}.table-wrap td:last-child{min-width:120px}.modal{padding:22px}.modal-heading h2{font-size:17px}.modal .form-actions .button{font-size:12px;padding:10px 13px}.weekday-field>div{gap:6px}.weekday-field button{width:34px;height:36px}.messages{margin-top:15px}.message{gap:8px;margin-bottom:26px}.assistant-avatar{height:27px;width:27px;border-radius:9px}.assistant-avatar svg{width:16px}.assistant-name{font-size:11px;padding-top:2px}.assistant-name>span{font-size:8px}.markdown{font-size:14px;line-height:1.9}.message.user>.message-body{padding:12px 15px;max-width:90%}.learning-card{padding:15px;border-radius:13px}.exercise-card form{flex-direction:column;align-items:flex-start;gap:9px}.exercise-card input{width:100%;min-height:42px;font-size:13px}.exercise-card .button{min-height:38px}.card-kicker{font-size:10px}.card-kicker>span{font-size:8px}.activity{margin-left:35px;font-size:10px}.grading-head strong{font-size:12px}.login-art{padding:22px}.login-hero h1{font-size:23px}.login-hero>.mascot{right:-18px;width:150px;top:-9px}.login-form-area{padding:29px 24px 40px}.login-form h2{font-size:22px}.login-form .field input{font-size:14px}.notification-popover{right:10px;width:330px}.toast{font-size:12px;max-width:calc(100vw - 24px);width:max-content;top:69px}}@media(max-height:760px)and (min-width:761px){.sidebar-note{display:none}.subject-nav{max-height:calc(100vh - 425px)}.welcome{margin-top:24px;margin-bottom:15px}.welcome-hero{min-height:230px;padding:20px 0}.hero-scene{height:205px}.hero-scene .mascot{width:215px}.quick-card{padding-top:15px;padding-bottom:15px}.composer-dock{padding-top:10px;padding-bottom:10px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}.learning-page:not(.has-messages) .composer-dock{position:relative;bottom:auto}.legacy-notice{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin:16px 35px 0;padding:10px 15px;border:1px solid var(--line);border-radius:11px;background:var(--panel-soft);color:var(--accent);font-size:11px}.legacy-notice .text-button{font-size:10px}.legacy-notice .text-button:last-child{margin-left:auto}@media(max-width:480px){.legacy-notice{margin:12px 15px 0}}@media(max-width:480px){.hero-scene{overflow:hidden}}.sidebar{width:224px;padding:18px 12px 0}.sidebar .brand{font-size:17px;gap:8px;padding:0 6px;min-height:35px}.sidebar .brand-symbol{width:30px;height:30px;border-radius:10px}.sidebar .brand small{font-size:8px;letter-spacing:.04em;font-weight:400}.desktop-collapse{margin-left:auto;width:25px;height:25px;flex-shrink:0;color:var(--muted)}.primary-nav{margin-top:22px;gap:3px}.primary-nav>button{min-height:37px;padding:8px 11px;font-size:13px;gap:10px;border-radius:8px;font-weight:450}.primary-nav>button svg{width:17px;height:17px}.primary-nav>button.new-study,.primary-nav>button.new-study:hover{background:var(--accent-soft);color:var(--ink);box-shadow:none;margin-bottom:5px;font-weight:600}[data-theme=space] .primary-nav>button.new-study{color:var(--ink)!important}.nav-hint,.keycap{display:none}.sidebar-scroll{flex:1;min-height:0;overflow:auto;scrollbar-width:thin;scrollbar-color:var(--line) transparent;padding-bottom:12px}.subject-section-label{margin:23px 8px 7px;font-size:10px;letter-spacing:.04em;min-height:22px}.subject-section-label small{font-size:9px;opacity:.7;margin-left:5px}.subject-nav{max-height:none;overflow:visible}.subject-group{margin-bottom:1px}.subject-main{gap:9px;padding:8px 9px;font-size:12px;min-height:34px}.subject-main>svg:first-child{flex-shrink:0;color:var(--muted)}.subject-row.current{background:transparent}.subject-row:hover{background:var(--panel-soft);border-radius:7px}.subject-edit{width:23px}.session-links{margin:1px 4px 5px 18px;padding-left:9px}.session-links button{padding:6px 5px;font-size:11px}.recent-list>button{display:flex;width:100%;align-items:center;gap:8px;padding:8px 9px;border-radius:6px;text-align:left;color:var(--ink);font-size:11px;min-height:33px}.recent-list>button:hover,.recent-list>button.active{background:var(--accent-soft)}.recent-list>button>span{flex:1;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.recent-list small{font-size:9px;color:var(--faint);flex-shrink:0}.recent-list>p{font-size:10px;color:var(--faint);padding:0 9px}.recent-list .recent-more{color:var(--muted);font-size:10px}.sidebar-bottom{flex-shrink:0;margin-top:0;padding-top:8px;border-top:1px solid var(--line)}.sidebar-bottom>button{padding:8px 10px;min-height:33px;font-size:12px}.profile{padding:12px 5px;margin-top:8px}.profile .avatar{width:29px;height:29px;font-size:12px}.profile strong{font-size:11px}.profile small{font-size:9px}.main{margin-left:224px}.topbar{min-height:45px;border:0;background:transparent;padding:0 25px}.local-status{display:none}.learning-page{height:100dvh;min-height:0}.welcome{margin:14px auto 10px;min-height:0;width:min(800px,calc(100% - 80px));display:flex;flex-direction:column;justify-content:center}.welcome-topline{flex-shrink:0}.welcome-topline .topbar{width:100%;min-height:32px;padding:0}.welcome-hero{min-height:0;flex:1;max-height:300px;padding:clamp(12px,2vh,28px) 0}.welcome-hero h1{font-size:clamp(28px,3.8vh,42px);margin-bottom:12px}.hero-scene{height:clamp(160px,26vh,230px);width:240px}.hero-scene .mascot{width:clamp(160px,25vh,230px)}.quick-card{padding:15px}.quick-grid{gap:10px}.welcome-actions-header{margin:5px 0 12px}.composer-dock{width:min(800px,calc(100% - 80px));flex-shrink:0;padding:10px 0 12px}.composer-card>textarea{min-height:65px;padding:14px 17px 6px;resize:none}.composer-note{margin-top:8px}.conversation-toolbar{width:min(800px,calc(100% - 80px));margin:10px auto 0;flex-shrink:0}.conversation-toolbar .topbar{padding:0;min-height:35px}.has-messages .messages{width:min(800px,calc(100% - 80px));margin:0 auto;overflow:auto;min-height:0;flex:1;overscroll-behavior:contain}.has-messages .composer-dock{position:relative}.sidebar-collapsed .sidebar{width:66px;padding-inline:8px}.sidebar-collapsed .main{margin-left:66px}.sidebar-collapsed .sidebar .brand{padding:0;justify-content:center}.sidebar-collapsed .brand-symbol,.sidebar-collapsed .brand>span,.sidebar-collapsed .primary-nav span,.sidebar-collapsed .sidebar-scroll,.sidebar-collapsed .theme-tiny,.sidebar-collapsed .profile>div,.sidebar-collapsed .profile>.avatar{display:none}.sidebar-collapsed .desktop-collapse{margin:0}.sidebar-collapsed .primary-nav>button{justify-content:center;padding:10px}.sidebar-collapsed .sidebar-bottom{margin-top:auto}.sidebar-collapsed .sidebar-bottom>button{font-size:0;justify-content:center;gap:0}.sidebar-collapsed .profile{justify-content:center}.study-pet{position:fixed;z-index:22;right:14px;bottom:170px;width:83px;--pet-fill: #e2edcc}[data-theme=space] .study-pet{--pet-fill: #c2b9e6}[data-theme=pixel] .study-pet{--pet-fill: #c8e7ed}.pet-character{width:100%;display:grid;place-items:center;border-radius:40%}.pet-character svg{width:100%;overflow:visible}.pet-character>span{display:flex;align-items:center;gap:5px;padding:4px 9px;border:1px solid var(--line);border-radius:20px;font-size:9px;color:var(--muted);background:var(--panel);margin-top:-4px}.pet-body{animation:pet-breathe 4s ease-in-out infinite;transform-origin:60px 128px}.pet-eyes{animation:pet-blink 6s infinite;transform-origin:60px 65px}.pet-character:hover .pet-body{transform:rotate(-5deg)}.pet-bubble{position:absolute;width:238px;padding:15px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);right:0;bottom:124px}.pet-bubble>div{display:flex;justify-content:space-between;align-items:center}.pet-bubble strong{font-size:11px}.pet-bubble .icon-button{width:20px;height:20px}.pet-bubble p{font-size:12px;line-height:1.8;margin:9px 0 12px}.pet-bubble>button{font-size:10px;margin-right:15px}.pet-restore{position:fixed;right:16px;bottom:165px;display:flex;align-items:center;gap:5px;padding:7px 9px;border:1px solid var(--line);background:var(--panel);color:var(--muted);font-size:10px;border-radius:20px;z-index:22}@keyframes pet-breathe{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes pet-blink{0%,43%,47%,to{transform:scaleY(1)}45%{transform:scaleY(.12)}}@media(min-width:761px)and (max-height:700px){.welcome{margin-top:7px}.welcome-hero{padding:8px 0}.hello{margin-bottom:6px}.hero-subtitle{font-size:11px}.quick-card{padding:11px 14px}.quick-card .quick-icon{width:35px;height:35px}.quick-card h3{font-size:12px}.composer-dock{padding-bottom:7px}.composer-note{font-size:8px}}@media(max-width:1100px){.study-pet{width:58px;bottom:165px;right:8px}.pet-bubble{bottom:90px}}@media(max-width:760px){.main,.sidebar-collapsed .main{margin-left:0}.sidebar,.sidebar-collapsed .sidebar{width:245px;padding:20px 13px 0}.desktop-collapse{display:none}.learning-page{min-height:100dvh;height:auto}.learning-page.has-messages{height:100dvh;min-height:0}.welcome{width:calc(100% - 32px);margin:8px auto 12px}.welcome-hero{flex:none;min-height:230px}.welcome-hero>div:first-child{max-width:68%}.welcome-hero h1{font-size:30px}.hero-scene{width:130px;height:180px;right:0}.hero-scene .mascot{width:140px}.quick-card{min-height:117px;padding:13px}.composer-dock,.has-messages .messages,.conversation-toolbar{width:calc(100% - 32px)}.welcome-topline .topbar{padding:0}.study-pet{width:45px;right:8px;bottom:175px}.pet-character>span{font-size:8px;padding:3px 6px}.pet-bubble{width:215px;bottom:77px}.sidebar-collapsed .sidebar .brand-symbol,.sidebar-collapsed .sidebar .brand>span{display:initial}.sidebar-collapsed .sidebar-scroll{display:block}.sidebar-collapsed .primary-nav span{display:initial}.sidebar-collapsed .sidebar-bottom>button{font-size:12px}.sidebar-collapsed .profile>div,.sidebar-collapsed .profile>.avatar{display:initial}.sidebar-collapsed .theme-tiny{display:initial}}@media(prefers-reduced-motion:reduce){.pet-body,.pet-eyes{animation:none}}.pet-character>span{white-space:nowrap}.pet-character>span svg{width:10px;height:10px;flex-shrink:0}@media(min-width:761px)and (max-height:600px){.welcome-hero{max-height:180px}.hero-scene{height:155px}.hero-scene .mascot{width:155px}.hero-subtitle,.quick-card p{display:none}.quick-card h3{margin-bottom:0}.quick-card{padding-block:10px}.quick-grid{gap:8px}.composer-card>textarea{min-height:52px}.composer-footer{padding-bottom:7px}.composer-note{margin-top:5px}}.analysis-page{max-width:1200px;margin-inline:auto}.analysis-emblem{width:65px;height:65px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);border-radius:22px}.analysis-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}.analysis-tabs{display:flex;gap:4px;padding:4px;border:1px solid var(--line);background:var(--panel-soft);border-radius:11px}.analysis-tabs button{font-size:12px;padding:10px 18px;border-radius:8px;color:var(--muted)}.analysis-tabs [aria-selected=true]{background:var(--panel);box-shadow:var(--shadow);color:var(--accent);font-weight:600}.analysis-date{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:11px}.analysis-date input{background:var(--panel);border:1px solid var(--line);padding:8px;border-radius:8px;color:var(--ink);font:inherit}.analysis-range{font-size:10px;color:var(--muted)}.analysis-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.analysis-metric{border:1px solid var(--line);background:var(--panel);border-radius:var(--radius);padding:21px}.analysis-metric>span{color:var(--muted);font-size:11px}.analysis-metric strong{display:block;font-size:33px;font-weight:550;margin-top:17px}.analysis-metric small{font-size:11px;color:var(--muted);margin-left:7px;font-weight:400}.analysis-data-note{font-size:10px;color:var(--muted);line-height:1.9}.analysis-charts{display:grid;grid-template-columns:1.1fr 1fr;gap:16px;margin:23px 0 30px}.analysis-panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}.analysis-panel .section-heading{align-items:center;margin-bottom:23px}.analysis-panel .section-heading h2{font-size:13px}.analysis-panel .section-heading small{font-size:9px;color:var(--faint)}.subject-analysis{margin-bottom:20px}.subject-analysis>div:first-child{display:flex;justify-content:space-between;align-items:center;margin-bottom:9px}.subject-analysis strong{font-size:12px;font-weight:500}.subject-analysis small{font-size:9px;color:var(--muted)}.result-bar{display:flex;height:6px;border-radius:4px;overflow:hidden;background:var(--panel-soft);margin-bottom:5px}.result-bar .correct{background:var(--accent)}.result-bar .incorrect{background:var(--orange)}.result-bar .unclear{background:var(--line)}.analysis-legend{display:flex;gap:13px;font-size:9px;color:var(--muted);margin-top:20px}.analysis-legend span:first-child{color:var(--accent)}.analysis-legend span:nth-child(2){color:var(--orange)}.hours-chart{display:flex;align-items:end;gap:4px;height:126px;margin:12px 0 24px;padding-bottom:18px}.hours-chart>div{flex:1;height:100%;display:flex;align-items:end;position:relative}.hours-chart i{width:100%;display:block;background:var(--accent);border-radius:3px 3px 0 0;opacity:.7}.hours-chart small{position:absolute;bottom:-18px;white-space:nowrap;font-size:8px;color:var(--faint)}.analysis-period{font-size:9px;color:var(--muted)}.analysis-report{border-top:1px solid var(--line);padding-top:28px}.analysis-report-heading{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:22px}.analysis-report-heading h2{font-size:21px;margin:10px 0}.analysis-report-heading p{color:var(--muted);font-size:11px;line-height:1.8;margin:0}.analysis-report-heading>button{flex-shrink:0;font-size:11px}.analysis-summary{display:flex;gap:14px;padding:22px;background:var(--accent-soft);border-radius:var(--radius);color:var(--ink);margin:20px 0}.analysis-summary svg{color:var(--accent);flex-shrink:0;margin-top:4px}.analysis-summary p{margin:0;line-height:1.9;font-size:13px;white-space:pre-line}.analysis-observations{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.analysis-panel h3{display:flex;align-items:center;gap:9px;font-size:13px;margin:0 0 20px}.analysis-panel h3 .quick-icon{width:31px;height:31px;border-radius:9px}.analysis-panel h4{font-size:12px;line-height:1.8;margin:0 0 8px}.analysis-panel article{margin-top:20px}.analysis-panel article+article{border-top:1px solid var(--line);padding-top:18px}.analysis-panel article p{font-size:12px;line-height:1.9;margin:0 0 10px;white-space:pre-line}.analysis-panel>.muted{font-size:12px;line-height:1.9}.analysis-evidence details{background:var(--panel-soft);border:1px solid var(--line);border-radius:7px;padding:9px;margin-bottom:7px}.analysis-evidence summary{cursor:pointer;font-size:10px;color:var(--muted)}.analysis-evidence p{padding-top:9px;overflow-wrap:anywhere}.analysis-evidence .text-button{font-size:10px}.analysis-suggestion{color:var(--accent);margin-top:12px!important}.analysis-next{margin-top:20px;padding:22px;background:var(--panel-soft);border-radius:var(--radius)}.analysis-next h3{font-size:14px;margin:0 0 15px}.analysis-next ol{padding-left:22px;margin:0}.analysis-next li{font-size:12px;line-height:1.9;padding-left:3px;margin-bottom:8px}.analysis-limitations{font-size:10px;color:var(--muted);line-height:1.9;margin:20px 0}.analysis-footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;color:var(--faint);font-size:9px}.analysis-await{text-align:center;border:1px dashed var(--line);border-radius:var(--radius);padding:40px 25px;color:var(--muted)}.analysis-await svg{color:var(--highlight)}.analysis-await h3{font-size:13px;color:var(--ink);font-weight:500;line-height:1.9}.analysis-await p{font-size:11px;line-height:1.9;max-width:480px;margin:0 auto}@media(max-width:900px){.analysis-metric{padding:16px}.analysis-charts,.analysis-observations{grid-template-columns:1fr}}@media(max-width:480px){.analysis-metrics{grid-template-columns:1fr 1fr;gap:9px}.analysis-metric strong{font-size:29px;margin-top:10px}.analysis-emblem{display:none}.analysis-report-heading{align-items:flex-start;flex-direction:column}.analysis-report-heading h2{font-size:18px}.analysis-panel{padding:18px}.analysis-date span{display:none}.analysis-tabs button{padding:9px 12px;font-size:11px}.analysis-date{font-size:10px}.analysis-toolbar{gap:10px}.analysis-summary{padding:17px}.analysis-summary p{font-size:12px}.analysis-footer{line-height:1.8}}.message-speak{display:inline-flex;align-items:center;gap:5px;color:var(--muted);margin-top:14px;font-size:10px;padding:5px 7px;border-radius:6px}.message-speak:hover,.message-speak.active{background:var(--accent-soft);color:var(--accent)}.message-speak svg{width:14px;height:14px}.voice-privacy{font-size:11px;line-height:1.9;color:var(--muted);background:var(--panel-soft);padding:13px;border-radius:9px;margin:0 0 18px}.voice-panel .field textarea{color:var(--ink);background:var(--panel);border:1px solid var(--line);border-radius:9px;padding:12px;font:inherit;line-height:1.9;resize:vertical;width:100%}.voice-recording,.voice-working,.voice-ready{text-align:center;padding:25px 0}.voice-recording strong{display:block;font-size:17px;margin:10px 0}.voice-recording p,.voice-working p,.voice-ready p{font-size:12px;line-height:1.9;color:var(--muted)}.voice-ready>svg{color:var(--accent)}.voice-ready small{display:block;color:var(--faint);font-size:10px;margin-top:15px}.voice-working>svg{width:30px;height:30px}.voice-cancel{display:flex;margin:12px auto 0;font-size:11px}.recording-dot{display:inline-block;width:16px;height:16px;border-radius:50%;background:var(--orange);animation:pet-breathe 1s ease-in-out infinite}.voice-recording .button,.voice-ready .button{margin-top:12px}.app:has(.analysis-page) .study-pet{width:48px;bottom:18px;right:14px}.app:has(.analysis-page) .pet-bubble{bottom:80px}.app:has(.analysis-page) .pet-restore{bottom:18px}