:root{--bg:#f7f7f5;--surface:#ffffff;--text:#1d1d1b;--text-muted:#6b6b66;--border:#e3e2dd;--accent:#2f6f4f;--accent-text:#ffffff;--danger:#b3261e;--radius:10px;--sidebar-width:240px;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}@media (prefers-color-scheme:dark){:root{--bg:#151514;--surface:#1f1f1d;--text:#ecebe6;--text-muted:#a3a29c;--border:#34342f;--accent:#6fbf94;--accent-text:#0f1a14;--danger:#f2a39d}}*{box-sizing:border-box}body,html{margin:0;height:100%}body{background:var(--bg);color:var(--text);line-height:1.5}a{color:inherit}.teacher-shell{display:grid;grid-template-columns:var(--sidebar-width) 1fr;min-height:100vh}.teacher-shell nav{background:var(--surface);border-right:1px solid var(--border);padding:16px 8px}.teacher-shell main{padding:24px 32px}.student-shell{max-width:560px;margin:0 auto;min-height:100vh;padding-bottom:72px}.student-shell main{padding:16px}.student-shell nav{position:fixed;left:0;right:0;bottom:0;display:flex;justify-content:space-around;background:var(--surface);border-top:1px solid var(--border);padding:8px 0 calc(8px + env(safe-area-inset-bottom))}.auth-shell{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}.auth-card{width:100%;max-width:420px;background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:28px 24px}.auth-brand{font-weight:600;color:var(--accent);margin-bottom:16px}.auth-card h1{font-size:22px;margin:0 0 8px}.muted{color:var(--text-muted)}.link-button{background:none;border:0;padding:0;font:inherit;color:var(--accent);cursor:pointer;text-decoration:underline}.stack{display:flex;flex-direction:column;gap:12px}.check{display:flex;gap:10px;align-items:flex-start;font-size:14px}.check input{margin-top:3px}fieldset{border:1px solid var(--border);border-radius:var(--radius);padding:12px 16px;margin:0 0 16px}legend{font-weight:500;padding:0 4px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin:24px 0 12px}.section-head h2{margin:0;font-size:18px}.copy-row code{display:block;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);word-break:break-all;font-size:13px}.invite-code{font-size:28px;font-weight:600;letter-spacing:.15em}.settings{max-width:640px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 20px;margin-bottom:16px}.card h2{font-size:17px;margin:0 0 12px}.card-danger{border-color:var(--danger)}.row-between{align-items:center;justify-content:space-between;gap:12px}.row-between,.row-gap{display:flex;flex-wrap:wrap}.row-gap{gap:8px}.plain-list{list-style:none;margin:0;padding:0}.plain-list li{padding:10px 0;border-bottom:1px solid var(--border)}.plain-list li:last-child{border-bottom:0}.student-top{justify-content:flex-end;gap:8px;padding:8px 16px 0}.student-top,.teacher-switcher{display:flex;align-items:center}.teacher-switcher{gap:6px;margin-right:auto;font-size:14px}.teacher-switcher select{min-height:32px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.toolbar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-bottom:12px}.search,.toolbar select{min-height:40px;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.search{flex:1 1;min-width:220px}.segmented{display:inline-flex;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}.segmented button{border:0;background:var(--surface);color:var(--text-muted);padding:8px 14px;font:inherit;cursor:pointer}.segmented button.active{background:var(--accent);color:var(--accent-text)}.tabs{display:flex;gap:4px;border-bottom:1px solid var(--border);margin:16px 0;overflow-x:auto}.tabs button{border:0;background:none;padding:10px 14px;font:inherit;color:var(--text-muted);cursor:pointer;border-bottom:2px solid transparent;white-space:nowrap}.tabs button.active{color:var(--text);border-bottom-color:var(--accent)}.dl{display:grid;grid-template-columns:max-content 1fr;grid-gap:4px 16px;gap:4px 16px;margin:0 0 12px}.dl dt{color:var(--text-muted)}.dl dd{margin:0}.back-link{display:inline-block;margin-bottom:8px;color:var(--text-muted);text-decoration:none}.dog-card{display:flex;flex-direction:column;gap:2px;text-decoration:none}.dog-card:hover{border-color:var(--accent)}.player{position:relative;margin:0;-webkit-user-select:none;-moz-user-select:none;user-select:none}.player img,.player video{display:block;width:100%;max-height:70vh;border-radius:var(--radius);background:#000;object-fit:contain}.watermark{position:absolute;padding:2px 8px;border-radius:6px;font-size:13px;color:rgb(255 255 255/.55);background:rgb(0 0 0/.18);pointer-events:none;transition:all .8s ease;white-space:nowrap}.media{margin:0}.media figcaption{margin-top:6px;font-size:13px}.media audio{width:100%}.media-status{padding:24px;border-radius:var(--radius);background:var(--bg);color:var(--text-muted);text-align:center}.media-failed{color:var(--danger)}.file-link{text-decoration:none}.bar{height:8px;border-radius:4px;background:var(--border);overflow:hidden}.bar>div{height:100%;background:var(--accent);transition:width .3s}.bar-warn>div{background:var(--danger)}.upload-progress{display:flex;flex-direction:column;gap:8px}.external-video a{display:flex;align-items:center;gap:12px;text-decoration:none;border:1px solid var(--border);border-radius:var(--radius);padding:8px}.external-video img{width:120px;height:68px;object-fit:cover;border-radius:6px}.external-icon{width:48px;height:48px;display:grid;place-items:center;border-radius:50%;background:var(--bg)}@media (hover:hover) and (pointer:fine){.only-touch{display:none}}.messenger{display:grid;grid-template-columns:300px 1fr;grid-gap:16px;gap:16px;min-height:70vh}.messenger aside{border-right:1px solid var(--border);padding-right:12px;overflow-y:auto;max-height:75vh}.messenger-back{display:none}@media (max-width:768px){.messenger{grid-template-columns:1fr}.messenger aside{border:0;padding:0}.messenger-open aside,.messenger:not(.messenger-open) section{display:none}.messenger-back{display:inline;margin-bottom:8px}}.chat-index{list-style:none;margin:0;padding:0}.chat-index button{display:flex;flex-direction:column;gap:2px;width:100%;text-align:left;border:0;background:none;padding:10px;border-radius:var(--radius);font:inherit;color:var(--text);cursor:pointer}.chat-index button.active,.chat-index button:hover{background:var(--surface)}.chat-index-last{font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.badge,.chat-index-time{font-size:12px}.badge{display:inline-block;min-width:20px;padding:0 6px;border-radius:10px;background:var(--accent);color:var(--accent-text);font-weight:600;text-align:center}.chat{display:flex;flex-direction:column;height:min(75vh,calc(100vh - 180px));background:var(--surface);border:1px solid var(--border);border-radius:12px}.student-shell .chat{height:calc(100vh - 150px)}.chat-head{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 14px}.chat-call,.chat-head{border-bottom:1px solid var(--border)}.chat-call{padding:6px 14px;font-size:14px}.chat-list{flex:1 1;overflow-y:auto;padding:12px;display:flex;flex-direction:column;gap:10px}.chat-empty,.chat-older{align-self:center}.msg{align-self:flex-start;max-width:min(80%,520px);background:var(--bg);border-radius:12px;padding:8px 12px}.msg-mine{align-self:flex-end;background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.msg-pending{opacity:.7}.msg-text{white-space:pre-wrap;word-break:break-word}.msg-quote{border-left:3px solid var(--accent);padding-left:8px;margin-bottom:4px;font-size:13px;color:var(--text-muted)}.msg-attachment{margin-bottom:6px;max-width:360px}.msg-meta{font-size:11px;color:var(--text-muted);text-align:right}.msg-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;font-size:13px;margin-top:2px}.reaction{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:0 6px;cursor:pointer;font:inherit}.reaction-mine{border-color:var(--accent)}.reaction-picker summary{cursor:pointer;list-style:none;color:var(--text-muted)}.reaction-picker[open]{display:flex;gap:2px}.reaction-picker button{border:0;background:none;cursor:pointer;font-size:18px}.chat-compose{border-top:1px solid var(--border);padding:8px}.chat-compose-row{display:flex;gap:6px;align-items:flex-end}.chat-compose textarea{flex:1 1;resize:none;min-height:40px;max-height:140px;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg);color:var(--text);font:inherit}.chat-readonly{padding:12px;text-align:center;border-top:1px solid var(--border)}.icon-button{position:relative;border:0;background:none;font-size:20px;min-width:40px;min-height:40px;cursor:pointer;border-radius:var(--radius)}.icon-button:hover{background:var(--bg)}.icon-button.recording{color:var(--danger);font-size:14px}.bell{position:relative}.bell-badge{position:absolute;top:0;right:-4px;font-size:11px}.bell-panel{position:absolute;right:0;top:44px;width:min(360px,calc(100vw - 32px));max-height:70vh;overflow-y:auto;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 24px rgb(0 0 0/.15);padding:8px;z-index:50}.teacher-shell .bell-panel{left:0;right:auto}.bell-head{padding:4px 8px 8px}.bell-item{display:flex;flex-direction:column;gap:2px;width:100%;text-align:left;border:0;background:none;font:inherit;color:var(--text);padding:6px 8px;border-radius:8px;cursor:pointer}.bell-item:hover{background:var(--bg)}.bell-unread{border-left:3px solid var(--accent)}.bell-time{font-size:12px}.state-badges{display:inline-flex;gap:4px;flex-wrap:wrap}.state{font-size:12px;padding:2px 8px;border-radius:10px;background:var(--bg);color:var(--text-muted);white-space:nowrap}.state-assigned{background:color-mix(in srgb,var(--accent) 15%,var(--surface));color:var(--text)}.state-submitted{background:#fff4d6;color:#7a5a00}.state-needs_work,.state-overdue{background:color-mix(in srgb,var(--danger) 15%,var(--surface));color:var(--danger)}.state-accepted{background:var(--accent);color:var(--accent-text)}.attempt{padding:8px 0;border-bottom:1px solid var(--border)}.attempt:last-child{border-bottom:0}.review{margin-top:8px;padding:8px 12px;border-radius:var(--radius);background:var(--bg);border-left:3px solid var(--border)}.review-ok{border-left-color:var(--accent)}.review-work{border-left-color:var(--danger)}.attachments{display:flex;flex-direction:column;gap:10px}.attachment{max-width:420px}.review-panel{max-width:760px}.admin-shell{display:grid;grid-template-columns:var(--sidebar-width) 1fr;min-height:100vh}.admin-shell nav{background:var(--surface);border-right:1px solid var(--border);padding:16px 8px}.admin-shell main{padding:24px 32px}.nav-brand{font-weight:600;padding:8px 12px 16px}.nav-link{display:block;padding:8px 12px;border-radius:var(--radius);text-decoration:none;color:var(--text-muted)}.nav-link:hover{background:var(--bg);color:var(--text)}.student-shell .nav-link{font-size:13px;padding:6px 8px}@media (max-width:768px){.admin-shell,.teacher-shell{grid-template-columns:1fr}.admin-shell nav,.teacher-shell nav{border-right:0;border-bottom:1px solid var(--border)}.admin-shell main,.teacher-shell main{padding:16px}}.level{align-items:center;gap:8px}.level,.level-dots{display:inline-flex}.level-dots{gap:3px}.dot{width:10px;height:10px;border-radius:50%;border:1.5px solid var(--accent)}.dot-on{background:var(--accent)}.level-label{font-size:14px}.skill-category{margin:16px 0 4px;font-size:15px}.skill-list{list-style:none;margin:0;padding:0}.skill-row{display:grid;grid-template-columns:minmax(140px,1.2fr) minmax(160px,1.5fr) 70px auto;grid-gap:4px 12px;gap:4px 12px;align-items:center;padding:8px 0;border-bottom:1px solid var(--border)}.skill-name{text-align:left;font-weight:500}.skill-target{font-size:13px}.skill-details{grid-column:1/-1;padding:8px 12px 4px;background:var(--bg);border-left:3px solid var(--accent)}.skill-history li+li{margin-top:8px}.skill-hidden{opacity:.55}.catalog-skill{display:flex;justify-content:space-between;gap:12px;align-items:start;padding:8px 0;border-bottom:1px solid var(--border)}.catalog-skill:last-child{border-bottom:0}.tags{display:flex;flex-wrap:wrap;gap:4px}.tag{display:inline-block;padding:1px 8px;border-radius:10px;border:1px solid var(--border);font-size:12px}.wizard-steps{display:flex;gap:6px;margin-bottom:12px}.wizard-steps span{flex:1 1;height:4px;border-radius:2px;background:var(--border)}.wizard-steps span.done{background:var(--accent)}@media (max-width:640px){.skill-row{grid-template-columns:1fr auto}.skill-actions{grid-column:1/-1}}:root{--plan-done:#4f9d6b;--plan-partial:#e3b341;--plan-missed:#d0584f}.state-report-done{background:color-mix(in srgb,var(--plan-done) 20%,var(--surface));color:var(--text)}.state-report-failed,.state-report-partial{background:color-mix(in srgb,var(--plan-partial) 25%,var(--surface));color:var(--text)}.state-report-skipped{background:color-mix(in srgb,var(--plan-missed) 15%,var(--surface));color:var(--text)}.plan-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));grid-gap:6px;gap:6px;max-width:520px}.plan-weekday{font-size:12px;text-align:center}.plan-cell{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;border-radius:8px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;cursor:pointer}.plan-cell-date{font-size:12px}.plan-cell-mark{font-size:13px;font-weight:600}.plan-done{background:color-mix(in srgb,var(--plan-done) 35%,var(--surface))}.plan-partial{background:color-mix(in srgb,var(--plan-partial) 40%,var(--surface))}.plan-missed{background:color-mix(in srgb,var(--plan-missed) 35%,var(--surface))}.plan-future,.plan-today{background:var(--surface)}.plan-rest{background:var(--bg);color:var(--text-muted)}.plan-today{outline:2px solid var(--accent)}.plan-selected{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 40%,transparent)}.plan-legend{font-size:12px}.dot-legend{display:inline-block;width:10px;height:10px;border-radius:3px;border:1px solid var(--border);vertical-align:middle}.plan-item{padding:10px 0;border-bottom:1px solid var(--border)}.plan-item:last-child{border-bottom:0}.plan-report .review{margin-top:8px}.editor{display:grid;grid-template-columns:minmax(0,1fr) 280px;grid-gap:16px;gap:16px;align-items:start}.editor-library{position:-webkit-sticky;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto}.editor-day{margin-bottom:12px}.editor-day-target{outline:2px solid var(--accent)}.editor-day-locked{opacity:.7}.editor-item{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-gap:6px 12px;gap:6px 12px;padding:8px 0;border-top:1px solid var(--border)}.editor-item input[type=number]{width:72px}.norm-inline{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:14px}.editor-item .note-input,.norm-inline input,.norm-inline select{min-height:32px;padding:4px 8px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.editor-item .note-input{width:100%}.library-item{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:6px 8px;border-radius:6px;cursor:-webkit-grab;cursor:grab}.library-item:hover{background:var(--bg)}.today-plan .plan-item{display:flex;justify-content:space-between;align-items:center;gap:12px}@media (max-width:900px){.editor{grid-template-columns:1fr}.editor-library{position:static;max-height:none}}.state-plan-draft{background:var(--bg)}.state-plan-active{background:color-mix(in srgb,var(--accent) 15%,var(--surface));color:var(--text)}.state-plan-finished{background:var(--bg);color:var(--text-muted)}.chips{display:flex;flex-wrap:wrap;gap:6px}.chip{padding:6px 12px;border-radius:16px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit;font-size:14px;cursor:pointer}.chip-on{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.distance-input{width:80px;min-height:36px;padding:4px 8px;border-radius:6px;border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.reaction-0{--r:#4f9d6b}.reaction-1{--r:#8db24f}.reaction-2{--r:#d4b73c}.reaction-3{--r:#e3903b}.reaction-4{--r:#dc6a3f}.reaction-5{--r:#c4383a}.reaction-buttons{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));grid-gap:6px;gap:6px}.reaction-button{display:flex;flex-direction:column;align-items:center;gap:2px;padding:10px 2px;border-radius:10px;border:2px solid var(--r);background:color-mix(in srgb,var(--r) 12%,var(--surface));color:var(--text);font:inherit;font-size:11px;cursor:pointer;line-height:1.2}.reaction-button strong{font-size:20px}.reaction-on{background:var(--r);color:#fff}.reaction-badge{display:inline-block;padding:2px 8px;border-radius:10px;background:color-mix(in srgb,var(--r) 25%,var(--surface));border:1px solid var(--r);font-size:12px;white-space:nowrap}.observation-row{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:center;width:100%;padding:0;border:0;background:none;color:var(--text);font:inherit;text-align:left;cursor:pointer}.chart{margin:0 0 16px}.chart svg{width:100%;max-width:640px;height:auto;display:block}.chart-grid{stroke:var(--border)}.chart-mark{stroke:var(--text-muted);stroke-dasharray:4 3}.chart-label{fill:var(--text-muted);font-size:11px}.chart-legend{gap:12px;font-size:12px;color:var(--text-muted)}.chart-legend,.flags{display:flex;flex-wrap:wrap}.flags{gap:6px}.flag{padding:2px 8px;border-radius:10px;background:color-mix(in srgb,var(--danger) 12%,var(--surface));color:var(--danger);font-size:12px;font-weight:600}@media (max-width:480px){.reaction-buttons{grid-template-columns:repeat(3,minmax(0,1fr))}}.home-block{margin-bottom:12px}.home-block h3{margin-top:0}.no-copy{-webkit-user-select:none;-moz-user-select:none;user-select:none}.no-copy input,.no-copy textarea{-webkit-user-select:text;-moz-user-select:text;user-select:text}.profile-head{display:flex;gap:16px;align-items:center}.profile-photo{width:88px;height:88px;border-radius:50%;object-fit:cover;flex-shrink:0}.library-layout{display:grid;grid-template-columns:240px minmax(0,1fr);grid-gap:16px;gap:16px;align-items:start}.folder-list li+li{margin-top:6px}.folder-list .chip{width:100%;text-align:left}.library-pdf{width:100%;height:70vh;border:1px solid var(--border);border-radius:8px;margin-bottom:8px}.library-image{position:relative;display:inline-block;max-width:100%}.library-image img{max-width:100%;border-radius:8px}@media (max-width:760px){.library-layout{grid-template-columns:1fr}}.update-banner{position:fixed;left:50%;bottom:calc(76px + env(safe-area-inset-bottom));transform:translateX(-50%);display:flex;gap:12px;align-items:center;padding:10px 14px;border-radius:12px;background:var(--surface);border:1px solid var(--border);box-shadow:0 4px 16px rgba(0,0,0,.15);z-index:50}.install-steps{margin:8px 0;padding-left:20px}.qr{width:180px;height:180px;image-rendering:pixelated}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 16px;border-radius:var(--radius);border:1px solid transparent;font:inherit;font-weight:500;cursor:pointer;text-decoration:none}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--accent);color:var(--accent-text)}.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border)}.btn-danger{background:var(--danger);color:#fff}.btn-block{width:100%}.field{display:flex;flex-direction:column;gap:4px;margin-bottom:16px}.field label{font-size:14px;font-weight:500}.field input,.field select,.field textarea{min-height:40px;padding:8px 12px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);color:var(--text);font:inherit}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px}.field-hint{font-size:13px;color:var(--text-muted)}.field-error{font-size:13px;color:var(--danger)}.field-invalid input,.field-invalid select,.field-invalid textarea{border-color:var(--danger)}.alert{padding:12px 16px;border-radius:var(--radius);border:1px solid var(--border);background:var(--surface);margin-bottom:16px}.alert-error{border-color:var(--danger);color:var(--danger)}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface)}.table{width:100%;border-collapse:collapse}.table td,.table th{padding:10px 12px;text-align:left;border-bottom:1px solid var(--border)}.table th{font-size:13px;font-weight:500;color:var(--text-muted)}.table tr:last-child td{border-bottom:0}.modal{border:0;border-radius:var(--radius);padding:0;background:var(--surface);color:var(--text);width:min(520px,calc(100vw - 32px))}.modal::-webkit-backdrop{background:rgb(0 0 0/.4)}.modal::backdrop{background:rgb(0 0 0/.4)}.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border)}.modal-header h2{margin:0;font-size:18px}.modal-body{padding:20px}.modal-close{background:none;border:0;font-size:22px;line-height:1;cursor:pointer;color:var(--text-muted)}.toasts{position:fixed;right:16px;bottom:16px;display:flex;flex-direction:column;gap:8px;z-index:1000}.toast{padding:12px 16px;border-radius:var(--radius);background:var(--text);color:var(--bg);box-shadow:0 4px 16px rgb(0 0 0/.15);max-width:360px}.toast-error{background:var(--danger);color:#fff}.empty{text-align:center;padding:48px 16px;color:var(--text-muted)}.empty h3{color:var(--text);margin:0 0 8px}.empty p{margin:0 0 16px}