:root{--bg: #f6efe4;--bg-cream: rgba(255, 251, 244, .84);--panel: rgba(255, 253, 248, .94);--panel-soft: #f8efe2;--panel-muted: #edf4ff;--panel-tint: rgba(239, 246, 255, .88);--sidebar: rgba(249, 251, 255, .76);--thread: rgba(255, 253, 247, .96);--surface: #ffffff;--border: #d8d0c4;--border-strong: #b8ab98;--ink: #17202e;--muted: #677287;--accent: #4d8cf5;--accent-soft: #e5f0ff;--accent-strong: #285ac7;--accent-warm: #ffe9c3;--accent-mint: #e7f7ef;--assistant: #fff2cf;--success: #e5f7eb;--danger: #ffe0d8;--shadow-lg: 0 26px 56px rgba(43, 59, 90, .14);--shadow-md: 0 16px 36px rgba(43, 59, 90, .1);--shadow-sm: 0 8px 18px rgba(43, 59, 90, .08);--radius-xl: 28px;--radius-lg: 20px;--radius-md: 14px;--radius-sm: 10px;--sidebar-width: 232px;--inspector-width: 248px}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;color:var(--ink);font-family:Avenir Next,Segoe UI,sans-serif;background:radial-gradient(circle at 12% 10%,rgba(122,173,255,.2),transparent 24rem),radial-gradient(circle at 88% 18%,rgba(255,205,140,.18),transparent 26rem),linear-gradient(180deg,#ffffff9e,#ffffff57),repeating-linear-gradient(0deg,rgba(103,114,135,.04) 0,rgba(103,114,135,.04) 1px,transparent 1px,transparent 46px),repeating-linear-gradient(90deg,rgba(103,114,135,.035) 0,rgba(103,114,135,.035) 1px,transparent 1px,transparent 46px),var(--bg)}button,input,textarea,select{font:inherit}button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid #2f68d4;border-radius:999px;background:linear-gradient(135deg,#61a0ff,#4277dd);color:#fff;padding:.8rem 1.18rem;font-weight:700;cursor:pointer;transition:transform .12s ease,box-shadow .12s ease,background .12s ease,opacity .12s ease;box-shadow:0 10px 20px #4d8cf538}button:hover{transform:translateY(-1px);box-shadow:0 14px 26px #4d8cf547}button:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.secondary-button,.ghost-button,.prompt-chip{background:#ffffffeb;color:var(--ink);border-color:var(--border);box-shadow:none}.secondary-button:hover,.ghost-button:hover,.prompt-chip:hover{background:#fff}.compact-button{padding-inline:.95rem;padding-block:.7rem}input,textarea,select{width:100%;border-radius:var(--radius-md);border:1px solid var(--border);background:#fffffff0;color:var(--ink);padding:.88rem .95rem;outline:none;transition:border-color .12s ease,box-shadow .12s ease,background .12s ease}input:focus,textarea:focus,select:focus{border-color:#4d8cf5ad;box-shadow:0 0 0 4px #4d8cf524;background:#fffffffa}textarea{min-height:126px;resize:vertical}h1,h2,h3,h4{margin:0;font-family:Trebuchet MS,Avenir Next,sans-serif;letter-spacing:-.03em}p{margin:0}.eyebrow,.section-label,.metric-label,.card-chip,.count-chip,.pill,.thread-badge,.rail-group-label{font-family:SFMono-Regular,Menlo,monospace;letter-spacing:.08em;text-transform:uppercase}.eyebrow{color:var(--accent-strong);font-size:.76rem}.section-label,.metric-label,.rail-group-label{color:var(--accent-strong);font-size:.72rem}.auth-scene,.app-scene{min-height:100vh;padding:24px}.auth-shell{width:min(1320px,100%);margin:0 auto;display:grid;grid-template-columns:1fr .96fr;gap:22px}.auth-shell-compact{width:min(456px,calc(100vw - 2rem));grid-template-columns:1fr}.auth-stack{display:grid;gap:16px}.auth-brand-card,.auth-card,.sidebar-shell,.main-shell,.inspector-shell,.workspace-topbar,.workspace-hero,.thread-rail,.thread-stage,.inspector-header,.inspector-card,.launchpad-card,.assistant-wait-card,.composer,.empty-state{border:1px solid var(--border);box-shadow:var(--shadow-md)}.auth-brand-card,.auth-card,.workspace-topbar,.workspace-hero,.thread-rail,.thread-stage,.inspector-header,.inspector-card,.launchpad-card,.assistant-wait-card,.composer,.empty-state{background:var(--panel)}.auth-brand-card{border-radius:var(--radius-xl);padding:22px 24px;display:flex;align-items:center;gap:14px}.auth-logo-box{width:52px;height:52px;display:grid;place-items:center;border-radius:16px;background:linear-gradient(135deg,#76adff,#4f7fe2);color:#fff;font-family:Trebuchet MS,Avenir Next,sans-serif;font-size:1.4rem;font-weight:800;box-shadow:0 10px 20px #4d8cf538}.auth-brand-subtitle,.sidebar-brand-subtitle{color:var(--muted);font-size:.92rem}.auth-card{border-radius:var(--radius-xl);padding:24px;display:grid;gap:18px}.auth-card-primary{background:#fffefbf5}.auth-card-secondary{background:#f5f9ffeb}.auth-switch-card{gap:14px}.auth-card-header,.auth-card-header-compact,.section-label-row,.rail-header,.workspace-topbar,.topbar-badges,.thread-stage-header,.inspector-header,.inspector-card-header,.thread-card-top,.mini-card-top,.workflow-card-header,.badge-row,.workspace-hero-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.badge-row{flex-wrap:wrap;justify-content:flex-end}.auth-card-header-compact{justify-content:flex-start}.auth-header-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px}.card-chip,.count-chip,.pill,.thread-badge{display:inline-flex;align-items:center;justify-content:center;min-height:30px;border-radius:999px;padding:.32rem .72rem;border:1px solid rgba(40,90,199,.18);background:#ffffffd6;color:var(--ink);font-size:.7rem;white-space:nowrap}.count-chip{min-width:30px;padding-inline:.54rem}.card-chip.ghost,.subtle-badge{color:var(--muted)}.accent-pill{background:var(--accent-soft);color:var(--accent-strong)}.stack-form,.sidebar-form,.compact-form,.composer,label{display:grid;gap:10px}label span{color:var(--muted);font-size:.9rem}.panel-note,.workspace-subtitle,.rail-header p,.thread-stage-subtitle,.composer-hint,.workspace-hero-subtitle{color:var(--muted);line-height:1.62}.auth-banner{width:min(1320px,100%);margin:18px auto 0}.status-banner{margin:0;border-radius:var(--radius-lg);padding:13px 16px;background:#e6f0ffe6;border:1px solid rgba(77,140,245,.24);color:var(--ink);box-shadow:var(--shadow-sm)}.workspace-shell{width:min(1480px,100%);margin:0 auto;display:grid;grid-template-columns:var(--sidebar-width) minmax(0,1fr) var(--inspector-width);gap:14px;align-items:start}.sidebar-shell,.main-shell,.inspector-shell{border-radius:var(--radius-xl);min-height:calc(100vh - 48px);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.sidebar-shell{background:var(--sidebar);padding:14px;display:grid;gap:10px;align-content:start}.main-shell{padding:14px;display:grid;gap:12px;background:#fffcf6b3}.inspector-shell{padding:14px;display:grid;gap:10px;align-content:start;background:#f0f6ffc7}.sidebar-brand{border-radius:var(--radius-lg);padding:16px;background:linear-gradient(145deg,#fffffff5,#ecf5ffe6);display:grid;gap:16px}.sidebar-brand h1{font-size:1.7rem}.profile-card{border-radius:var(--radius-lg);padding:14px 16px;background:linear-gradient(145deg,#e6f0fff5,#fff3dbf0);display:flex;align-items:center;gap:12px;border:1px solid rgba(77,140,245,.18)}.profile-avatar,.class-overview-icon{width:44px;height:44px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#7cadff,#5b86e5);color:#fff;font-family:Trebuchet MS,Avenir Next,sans-serif;font-size:1.08rem;font-weight:800;box-shadow:0 10px 20px #4d8cf538}.profile-card p,.class-card span,.class-card small,.thread-card small,.mini-card span,.mini-card small,.class-overview-copy p,.class-overview-copy small{color:var(--muted)}.sidebar-section{display:grid;gap:8px}.home-nav-card{background:linear-gradient(180deg,#e5f0ffeb,#ffffffdb)}.sidebar-form,.inspector-header,.inspector-card,.thread-rail,.thread-stage,.launchpad-card,.assistant-wait-card,.composer,.empty-state{border-radius:var(--radius-lg);padding:14px}.inspector-card{display:grid;gap:10px}.sidebar-form{background:#ffffffe0;box-shadow:none}.sidebar-form-grid{display:grid;gap:10px;grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.class-list,.thread-list,.mini-list,.messages,.rail-group{display:grid;gap:8px}.rail-group-label{padding-inline:2px}.rail-group-list{display:grid;gap:8px}.class-card,.thread-card,.mini-card,.class-overview-card{width:100%;display:grid;gap:6px;border-radius:16px;border:1px solid var(--border);background:#ffffffdb;color:var(--ink);text-align:left;padding:14px;box-shadow:none}.class-card strong,.thread-card strong,.mini-card strong,.class-overview-copy h3{font-size:1rem}.class-card:hover,.thread-card:hover,.mini-card:hover,.class-overview-card:hover{background:#fffffffa}.class-card.active,.thread-card.active,.active-overview-card{background:linear-gradient(180deg,#e5f0fff5,#f7fafff2);border-color:#4d8cf547;box-shadow:var(--shadow-sm)}.thread-preview{display:block;color:var(--muted);font-size:.92rem;line-height:1.5;margin-top:4px}.workspace-topbar{padding:16px 18px;background:linear-gradient(140deg,#fffffff5,#eaf4fff0),var(--panel)}.workspace-topbar h2{font-size:clamp(1.5rem,2vw,1.9rem);margin-top:4px}.workspace-topbar-compact{padding-block:14px}.workspace-topbar-compact h2{font-size:1.35rem}.workspace-topbar-compact .workspace-subtitle{max-width:38rem}.workspace-topbar-minimal{padding-top:12px;padding-bottom:12px}.workspace-hero{padding:14px 16px;display:grid;gap:10px;background:#ffffffe6}.workspace-hero-copy h3{margin-top:4px;font-size:clamp(1.35rem,2vw,1.7rem)}.workspace-hero-badges{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:6px}.studio-shell{display:grid;grid-template-columns:216px minmax(0,1fr);gap:12px;min-height:0;background:transparent;border:none;box-shadow:none;padding:0}.thread-rail{display:grid;gap:14px;align-content:start;background:#ffffffd1}.thread-stage{display:grid;grid-template-rows:auto auto minmax(0,1fr) auto;gap:12px;background:linear-gradient(180deg,#fffffff0,#fffaf2f2),var(--thread)}.thread-stage-meta{display:grid;gap:6px}.thread-stage-header h3{font-size:1.5rem}.launchpad-card,.assistant-wait-card{display:grid;gap:10px;box-shadow:none}.launchpad-card{background:#ffffffd6}.assistant-wait-card{background:linear-gradient(145deg,#e8f3fff5,#fff9ebf5)}.launchpad-header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}.prompt-chip-row,.empty-state-actions{display:flex;flex-wrap:wrap;gap:10px}.prompt-chip{width:auto;padding-inline:.96rem}.messages{min-height:460px;max-height:58vh;overflow:auto;align-content:start;padding-right:6px}.thread-empty-state{place-items:flex-start;text-align:left;gap:14px}.message{max-width:78%;padding:15px 16px;border-radius:20px;border:1px solid rgba(184,171,152,.72);background:#ffffffe6;box-shadow:var(--shadow-sm)}.message.user{justify-self:end;background:#e5f0fff5}.message.assistant{justify-self:start;background:var(--assistant)}.pending-message{border-style:dashed}.message header{display:flex;justify-content:space-between;gap:12px;margin-bottom:8px;color:var(--muted);font-size:.8rem}.message-heading{display:inline-flex;align-items:center;gap:8px}.message p{font-size:.96rem;line-height:1.72;white-space:pre-wrap}.message-generated-image{display:block;width:100%;max-width:420px;border-radius:16px;border:1px solid rgba(184,171,152,.72);margin-bottom:12px;background:#ffffffc7}.typing-dots{display:inline-flex;align-items:center;gap:.32rem;margin-right:.55rem;vertical-align:middle}.typing-dots span{width:.45rem;height:.45rem;border-radius:999px;background:currentColor;opacity:.32;animation:typing-pulse 1.1s infinite ease-in-out}.typing-dots span:nth-child(2){animation-delay:.16s}.typing-dots span:nth-child(3){animation-delay:.32s}@keyframes typing-pulse{0%,80%,to{opacity:.24;transform:translateY(0)}40%{opacity:.96;transform:translateY(-2px)}}.composer{background:#ffffffeb}.composer textarea:disabled{opacity:.78}.composer-actions{display:flex;align-items:flex-end;justify-content:space-between;gap:16px}.composer-button-row{display:flex;align-items:center;gap:10px}.composer-meta{display:grid;gap:8px}.composer-counter{color:var(--muted)}.job-error{color:#8c3a2a!important;line-height:1.45}.upload-field{display:grid;gap:10px;padding:12px;border:1px dashed rgba(40,90,199,.26);border-radius:16px;background:#ffffffad}.upload-field-note{color:var(--muted);line-height:1.55}.upload-field input[type=file]{padding:.75rem .92rem;background:#ffffffe0}.inspector-summary-row{display:flex;flex-wrap:wrap;gap:6px 10px;color:var(--muted);font-size:.82rem}.empty-state{color:var(--muted);padding:24px 22px;display:grid;place-items:center;min-height:180px;background:#ffffffc7}.workspace-empty{min-height:520px}.classes-home{display:grid;gap:16px}.classes-home-header,.classes-group-header{display:flex;align-items:center;justify-content:space-between;gap:12px}.classes-home-stack,.classes-group{display:grid;gap:14px}.classes-home-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.class-overview-card{display:flex;align-items:center;gap:14px}.class-overview-copy{display:grid;gap:4px}.inspector-empty{min-height:360px}@media(max-width:1320px){:root{--sidebar-width: 248px;--inspector-width: 276px}.workspace-shell{gap:14px}}@media(max-width:1180px){.workspace-shell{grid-template-columns:260px minmax(0,1fr)}.inspector-shell{grid-column:1 / -1;min-height:auto}}@media(max-width:1024px){.auth-shell,.workspace-shell,.studio-shell,.classes-home-grid{grid-template-columns:1fr}.sidebar-shell,.main-shell,.inspector-shell{min-height:auto}.thread-stage{grid-template-rows:auto auto auto minmax(0,1fr) auto}.messages{max-height:none}}@media(max-width:720px){.auth-scene,.app-scene{padding:14px}.sidebar-form-grid,.composer-actions,.classes-home-grid{grid-template-columns:1fr;display:grid}.composer-button-row{display:grid;grid-template-columns:1fr 1fr}.auth-card-header,.section-label-row,.rail-header,.workspace-topbar,.workspace-hero-header,.topbar-badges,.thread-stage-header,.inspector-header,.inspector-card-header,.thread-card-top,.mini-card-top,.launchpad-header{display:grid}.workspace-hero-badges{justify-content:flex-start}.message{max-width:100%}}.workspace-page{width:min(1240px,100%);margin:0 auto;display:grid;gap:18px}.app-shell-header,.home-surface,.classroom-layout,.home-hero-metrics,.classroom-summary-grid,.classroom-tools-grid,.workflow-card-grid,.home-class-groups{display:grid;gap:16px}.app-shell-header,.home-hero-card,.home-utility-card,.classroom-header-card,.classroom-drawer,.thread-compose-panel,.workflow-card,.summary-card{border:1px solid var(--border);border-radius:var(--radius-xl);background:#fffdf9eb;box-shadow:var(--shadow-sm)}.app-shell-header{grid-template-columns:minmax(0,1fr) auto;align-items:center;padding:18px 20px;background:linear-gradient(145deg,#fffffff5,#f1f6ffeb),var(--panel)}.app-shell-brand h1,.home-hero-card h2,.classroom-header-card h2{font-size:clamp(1.7rem,2vw,2.3rem);margin-top:6px}.app-shell-actions{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:10px;align-items:center}.app-shell-actions .profile-card{min-width:210px;margin:0;box-shadow:none;background:#ffffffd1}.profile-card-compact{padding:10px 14px}.home-surface{grid-template-columns:minmax(0,1.35fr) minmax(280px,.8fr);align-items:start}.home-primary,.home-utility-rail,.classroom-surface{display:grid;gap:16px}.home-hero-card,.classroom-header-card,.home-utility-card{padding:20px}.home-hero-card{display:grid;gap:18px;background:linear-gradient(145deg,#fffffff5,#f7fafff0),var(--panel)}.home-hero-metrics,.classroom-summary-grid,.workflow-card-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-metric,.summary-card,.workflow-card{border-radius:var(--radius-lg);border:1px solid rgba(40,90,199,.12);background:#ffffffe0;padding:14px 16px;display:grid;gap:8px}.hero-metric strong,.summary-card strong{font-size:1.6rem}.summary-card p,.workflow-card p{margin:0;color:var(--muted);line-height:1.55}.home-group-card{border-radius:var(--radius-xl);padding:18px;border:1px solid var(--border);background:#ffffffdb;box-shadow:var(--shadow-sm)}.home-class-groups{gap:18px}.home-utility-card{padding:18px;gap:14px;display:grid}.classes-home-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.class-overview-card{min-height:112px}.classroom-header-card{display:grid;gap:16px}.classroom-header-meta{display:flex;flex-wrap:wrap;gap:8px}.classroom-layout{grid-template-columns:minmax(230px,270px) minmax(0,1fr);align-items:start}.classroom-thread-rail,.classroom-thread-stage{min-height:0}.classroom-thread-rail{position:sticky;top:24px}.thread-rail,.thread-stage,.launchpad-card,.assistant-wait-card,.composer,.empty-state,.inspector-card{background:#ffffffe6}.classroom-thread-stage{gap:14px;grid-template-rows:auto auto minmax(280px,1fr) auto auto}.classroom-messages{min-height:380px;max-height:52vh}.thread-compose-panel{overflow:hidden}.thread-compose-panel summary,.classroom-drawer summary{list-style:none;cursor:pointer}.thread-compose-panel summary::-webkit-details-marker,.classroom-drawer summary::-webkit-details-marker{display:none}.thread-compose-panel summary{padding:14px 16px;font-weight:700;color:var(--accent-strong)}.thread-create-form{padding:0 16px 16px}.quiet-launchpad-card,.compact-wait-card,.classroom-composer{box-shadow:none}.classroom-drawer{overflow:hidden}.classroom-drawer summary{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;padding:16px 18px;background:#f2f7ffdb}.classroom-drawer[open] summary{border-bottom:1px solid rgba(40,90,199,.12)}.drawer-summary{color:var(--muted);font-size:.86rem;text-align:right;line-height:1.45}.workflow-card-grid,.classroom-tools-grid{padding:18px}.classroom-tools-grid{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start}.classroom-tools-grid .tool-card:last-child:nth-child(odd){grid-column:1 / -1}.tool-card{box-shadow:none}.workflow-card .thread-badge{justify-self:flex-start}.workspace-empty{min-height:320px}@media(max-width:1080px){.home-surface,.classroom-layout,.classroom-tools-grid,.classes-home-grid,.home-hero-metrics,.classroom-summary-grid,.workflow-card-grid{grid-template-columns:1fr}.classroom-thread-rail{position:static}}@media(max-width:860px){.app-shell-header,.classroom-drawer summary{grid-template-columns:1fr}.app-shell-actions{justify-content:flex-start}.app-shell-actions .profile-card{min-width:0;width:100%}}:root{--bg-app: #FFF6E9;--bg-card: #FFFFFF;--bg-elevated: #FFFDF6;--ink-primary: #2A2140;--ink-secondary: #5E5577;--ink-soft: #9A90B4;--robo-primary: #6B5BFF;--robo-warm: #FFC24B;--subject-math: #4CA7FF;--subject-english: #FF7A7A;--subject-science: #3CC47C;--subject-art: #FF9F66;--subject-music: #C46BFF;--subject-default: #6B5BFF;--ok: #3CC47C;--warn: #FFB347;--err: #E96A6A;--font-display: "Nunito", "Baloo 2", "Comic Neue", system-ui, sans-serif;--font-text: "Nunito", system-ui, sans-serif;--font-mono: ui-monospace, "Cascadia Code", monospace;--t-xs: 14px;--lh-xs: 20px;--t-sm: 16px;--lh-sm: 24px;--t-md: 18px;--lh-md: 28px;--t-lg: 22px;--lh-lg: 32px;--t-xl: 28px;--lh-xl: 36px;--t-hero: 40px;--lh-hero: 48px;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 48px;--space-8: 64px;--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-pill: 999px;--tap-min: 48px;--shadow-sm: 0 2px 0 rgba(42, 33, 64, .08);--shadow-md: 0 4px 0 rgba(42, 33, 64, .12);--shadow-lg: 0 6px 0 rgba(42, 33, 64, .16);--motion-fast: .14s cubic-bezier(.3, .7, .3, 1);--motion-mid: .26s cubic-bezier(.3, .7, .3, 1);--motion-bouncy: .36s cubic-bezier(.34, 1.56, .64, 1);--focus-ring: 2px solid var(--robo-primary);--focus-ring-offset: 2px}@media(prefers-reduced-motion:reduce){:root{--motion-fast: 1ms linear;--motion-mid: 1ms linear;--motion-bouncy: 1ms linear}}html,body{margin:0;padding:0;background:var(--bg-app);color:var(--ink-primary);font-family:var(--font-text);font-size:var(--t-md);line-height:var(--lh-md);-webkit-font-smoothing:antialiased}*,*:before,*:after{box-sizing:border-box}button{font-family:inherit}button:focus-visible{outline:var(--focus-ring);outline-offset:var(--focus-ring-offset)}
