.auth-page{min-height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem 1.25rem 3rem;gap:1.25rem;background:radial-gradient(ellipse 70% 55% at 12% 8%,rgba(163,117,242,.35),transparent 58%),radial-gradient(ellipse 55% 45% at 92% 88%,rgba(139,92,246,.25),transparent 55%),var(--bg-deep)}.auth-page__footer{margin:0;font-size:.78rem;color:var(--text-muted);letter-spacing:.04em}.auth-card{width:min(420px,100%);display:flex;flex-direction:column;gap:.75rem;padding:1.75rem 1.7rem 1.5rem;border:1px solid var(--line);border-radius:var(--radius-lg);background:#fffc;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);box-shadow:0 16px 48px #7c3aed29}.auth-card__logo{width:56px;height:56px;border-radius:22px;display:grid;place-items:center;margin:0 auto .15rem;background:var(--accent-gradient);color:#fff;font-weight:700;font-size:1.05rem;letter-spacing:-.02em;box-shadow:0 12px 32px #7c3aed59}.auth-card h1{margin:0;font-size:1.5rem;letter-spacing:-.02em;text-align:center;color:var(--text-primary)}.auth-card__eyebrow{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-primary);font-weight:650;text-align:center}.auth-card__hint{margin:0 0 .35rem;color:var(--text-secondary);font-size:.9rem;text-align:center;line-height:1.4}.auth-card label{display:flex;flex-direction:column;gap:.4rem;font-size:.85rem;color:var(--text-secondary);font-weight:500}.auth-card input{padding:.7rem .9rem;border-radius:var(--radius-md);border:1px solid var(--line-strong);background:#ffffffe6;color:var(--text-primary);outline:none;transition:border-color .15s ease,box-shadow .15s ease}.auth-card input:focus{border-color:var(--accent-secondary);box-shadow:0 0 0 3px #8b5cf633}.auth-card__error{color:#b91c1c;background:#b91c1c14;border:1px solid rgba(185,28,28,.25);border-radius:var(--radius-sm);padding:.55rem .75rem;font-size:.88rem}.auth-card__submit{margin-top:.35rem;width:100%;padding:.7rem 1rem;font-size:.95rem;border-radius:var(--radius-md)}.auth-card__dev{width:100%;font-size:.8rem;color:var(--text-muted)}.list-page{max-width:980px;margin:0 auto;padding:1.5rem 1.25rem 3rem}.list-page__header{display:flex;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:1.35rem}.list-page__header .auth-card__eyebrow{text-align:left}.list-page__header h1{margin:.2rem 0;letter-spacing:-.02em}.list-page__sub{margin:0;color:var(--text-secondary);font-size:.9rem}.list-page__empty{color:var(--text-secondary)}.list-page__empty-card{padding:1.25rem 1.35rem;border-radius:var(--radius-lg);border:1px dashed var(--line-strong);background:var(--bg-glass);color:var(--text-secondary);margin-bottom:1rem}.list-page__empty-card h2{margin:0 0 .4rem;font-size:1.1rem;color:var(--text-primary)}.list-page__empty-card p{margin:0;line-height:1.45}.course-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:.95rem}a.course-card{text-decoration:none;cursor:pointer}.course-card,a.course-card{position:relative;display:flex;flex-direction:column;gap:.45rem;padding:1.15rem 1.15rem 1rem;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);color:inherit;box-shadow:var(--shadow-sm);transition:box-shadow .15s ease,transform .12s ease;min-height:160px}.course-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.course-card--guide{border-color:#7c3aed59;background:linear-gradient(180deg,#ede9fed9,#ffffffbf)}.course-card__badge{align-self:flex-start;font-size:.68rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--accent-primary);background:var(--bg-soft);border-radius:var(--radius-pill);padding:.2rem .55rem}.course-card strong{font-size:1.05rem;letter-spacing:-.01em;line-height:1.3}.course-card__desc{margin:0;flex:1;font-size:.88rem;color:var(--text-secondary);line-height:1.4}.course-card__meta{font-size:.78rem;color:var(--text-muted);font-style:normal}.hub-page{height:100%;display:flex;flex-direction:column;min-height:0}.hub-page__header{display:flex;justify-content:space-between;gap:1rem;align-items:flex-start;padding:1rem 1.25rem;border-bottom:1px solid var(--line);background:var(--bg-header);flex-shrink:0}.hub-page__header-main{min-width:0;flex:1 1 auto}.hub-page__header h1{margin:.25rem 0;font-size:1.35rem}.hub-back{font-size:.85rem}.hub-page__actions{display:flex;align-items:center;gap:.5rem;flex-wrap:wrap;flex-shrink:0}.hub-page__error{margin:.5rem 1.25rem 0;flex-shrink:0}.hub-page__grid{flex:1;min-height:0;display:flex;flex-direction:row;overflow:hidden;height:100%}.hub-page__desc-wrap{margin-top:.25rem;display:flex;flex-direction:column;align-items:flex-start;gap:.3rem;max-width:52rem}.hub-page__desc{margin:0;color:var(--text-secondary);font-size:.9rem;line-height:1.45;white-space:pre-wrap;word-break:break-word}.hub-page__desc.is-collapsed{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2;overflow:hidden}.hub-page__desc.is-expanded{display:block;-webkit-line-clamp:unset;line-clamp:unset;overflow:visible}.hub-page__desc-toggle{padding:.2rem .65rem;font-size:.78rem;line-height:1.2}.hub-materials{margin:.65rem 0 .65rem .65rem;height:100%;max-height:100%;flex:1 1 auto;min-width:0;min-height:0;display:flex;flex-direction:column;overflow:hidden}.hub-boards{padding:1rem 1.25rem 2rem;overflow:auto;flex:1;min-width:0;min-height:0}.hub-boards h2{margin:0 0 .85rem;font-size:1.1rem}.hub-boards__list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.65rem}.workspace{display:flex;flex-direction:row;height:100%;min-height:0;min-width:var(--min-w);gap:0;overflow:hidden}.workspace__side{position:relative;display:flex;flex-direction:row;height:100%;min-height:0;min-width:0;overflow:hidden;transition:flex-basis .12s ease,width .12s ease}.workspace__side.is-collapsed{overflow:visible}.workspace__side .course-pane{flex:1;min-width:0;min-height:0;height:100%;max-height:100%;margin:.65rem 0 .65rem .65rem;overflow:hidden}.workspace__resizer{flex:0 0 6px;width:6px;margin:.65rem 0;cursor:col-resize;border-radius:var(--radius-pill);background:transparent;position:relative;z-index:2;align-self:stretch}.workspace__resizer:after{content:"";position:absolute;top:12%;bottom:12%;left:2px;width:2px;border-radius:2px;background:#7c3aed47;transition:background .15s ease,width .15s ease,left .15s ease}.workspace__resizer:hover:after,.workspace__resizer:active:after{background:var(--accent-primary);width:3px;left:1.5px}.workspace__main{flex:1 1 auto;min-width:0;min-height:0;height:100%}.board-pane__layout--solo{margin:.65rem;grid-template-columns:1fr;height:100%;min-height:0}.board-pane__layout--solo .board-pane__canvas-wrap{height:100%;min-height:0}.workspace-loading,.workspace-error{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;gap:.5rem;padding:2rem;text-align:center;color:var(--text-secondary)}.workspace-error h1{color:var(--text-primary);margin:0}.workspace-error code{font-family:var(--mono);background:var(--bg-soft);color:var(--accent-primary);padding:.15rem .45rem;border-radius:var(--radius-sm)}.course-pane{display:flex;flex-direction:column;height:100%;max-height:100%;overflow:hidden;margin:.65rem 0 .65rem .65rem;border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--bg-glass);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:var(--shadow-md);min-height:0}.course-pane__header{flex:0 0 auto;padding:1rem 1.25rem .85rem;border-bottom:1px solid var(--line);background:var(--bg-header);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-radius:var(--radius-lg) var(--radius-lg) 0 0}.course-pane__eyebrow{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--accent-primary);font-weight:650}.course-pane__title{margin:.3rem 0;font-size:1.2rem;font-weight:650;line-height:1.3;color:var(--text-primary);letter-spacing:-.015em}.course-pane__desc-wrap{margin:0 0 .75rem;display:flex;flex-direction:column;align-items:flex-start;gap:.35rem}.course-pane__desc{margin:0;font-size:.88rem;color:var(--text-secondary);line-height:1.45;white-space:pre-wrap;word-break:break-word}.course-pane__desc.is-collapsed{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;line-clamp:2;overflow:hidden}.course-pane__desc.is-expanded{display:block}.course-pane__desc-toggle{padding:.2rem .65rem;font-size:.78rem;line-height:1.2}.course-pane__select-label{display:flex;flex-direction:column;gap:.3rem;margin-top:.15rem}.course-pane__select-caption{font-size:.72rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted);font-weight:650}.course-pane__select{width:100%;max-width:100%;font:inherit;font-size:.9rem;color:var(--text-primary);padding:.55rem 2.2rem .55rem .85rem;border:1px solid var(--line-strong);border-radius:16px;background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:var(--shadow-sm);-moz-appearance:none;appearance:none;-webkit-appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--accent-primary) 50%),linear-gradient(135deg,var(--accent-primary) 50%,transparent 50%);background-position:calc(100% - 16px) calc(50% - 2px),calc(100% - 10px) calc(50% - 2px);background-size:6px 6px,6px 6px;background-repeat:no-repeat;cursor:pointer}.course-pane__select:focus{outline:2px solid rgba(124,58,237,.35);outline-offset:1px;border-color:var(--accent-primary)}.course-pane__nav{display:flex;flex-wrap:wrap;gap:.4rem}.course-pane__nav button.active{background:var(--accent-gradient);color:var(--text-on-accent);border-color:transparent;box-shadow:var(--glow-brand)}.course-pane__body{flex:1 1 auto;min-height:0;overflow-x:hidden;overflow-y:auto;max-height:100%;padding:1.25rem 1.35rem 2.5rem;background:#ffffff59;-webkit-overflow-scrolling:touch}.course-pane__article-title{margin:0 0 1rem;font-size:1.4rem;font-weight:650;letter-spacing:-.02em;color:var(--text-primary)}.cb-h2{font-size:1.2rem;margin:1.4rem 0 .6rem;color:var(--text-primary)}.cb-h3{font-size:1.05rem;margin:1.2rem 0 .5rem;color:var(--text-primary)}.cb-text{margin:.6rem 0;line-height:1.55;font-size:.95rem;color:var(--text-secondary)}.cb-list{margin:.5rem 0 .8rem;padding-left:1.2rem;line-height:1.55;color:var(--text-secondary)}.cb-callout{display:flex;flex-direction:column;gap:.25rem;margin:.9rem 0;padding:.85rem 1rem;border-left:3px solid var(--accent-primary);background:var(--bg-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;font-size:.9rem;line-height:1.45;color:var(--text-secondary)}.cb-callout--info{border-color:var(--info);background:#eef2ff}.cb-callout--warning{border-color:var(--warn);background:#fff7ed}.cb-callout--tip{border-color:var(--tip);background:#ecfdf5}.cb-figure{margin:.9rem 0}.cb-figure img{width:100%;border-radius:var(--radius-sm);border:1px solid var(--line);display:block;box-shadow:var(--shadow-sm)}.cb-figure figcaption{font-size:.8rem;color:var(--text-muted);margin-top:.35rem}.cb-carousel{display:grid;grid-template-columns:1fr;gap:.75rem}.cb-video{margin:.9rem 0}.cb-video-title{font-size:.85rem;margin-bottom:.35rem;color:var(--text-muted)}.cb-video iframe{width:100%;aspect-ratio:16/9;border:1px solid var(--line);border-radius:var(--radius-sm)}.cb-link{margin:.7rem 0}.cb-file{display:inline-flex;align-items:center;gap:.5rem;margin:.7rem 0;padding:.6rem .9rem;border:1px dashed var(--line-strong);border-radius:var(--radius-sm);text-decoration:none;color:var(--text-primary);background:var(--bg-glass)}.cb-file-size{color:var(--text-muted);font-size:.8rem}.cb-html{margin:.9rem 0;border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}.cb-html-title{padding:.45rem .7rem;font-size:.8rem;background:var(--bg-soft);border-bottom:1px solid var(--line);color:var(--text-secondary)}.cb-html iframe{width:100%;height:120px;border:0;background:#fff}.board-pane{display:flex;flex-direction:column;height:100%;background:transparent;min-width:0}.board-pane__toolbar{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1.1rem;border-bottom:1px solid var(--line);background:var(--bg-header);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.board-pane__brand{display:flex;flex-direction:column;gap:.15rem}.board-pane__brand strong{font-size:1rem;font-weight:650;letter-spacing:-.01em;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}.board-pane__user{font-size:.8rem;color:var(--text-secondary)}.board-pane__actions{display:flex;flex-wrap:wrap;gap:.45rem}.board-pane__layout{flex:1;display:grid;grid-template-columns:232px 1fr;min-height:0;margin:.65rem .65rem .65rem 0;gap:.65rem}.board-pane__list{border:1px solid var(--line);border-radius:var(--radius-md);overflow:auto;padding:.85rem;background:var(--bg-glass);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);box-shadow:var(--shadow-sm)}.board-pane__list-title{font-size:.72rem;text-transform:uppercase;letter-spacing:.07em;color:var(--text-muted);margin-bottom:.55rem;font-weight:600}.board-pane__empty{font-size:.88rem;color:var(--text-secondary)}.board-pane__list ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.4rem}.board-pane__list li{display:grid;grid-template-columns:1fr auto;gap:.25rem;align-items:stretch}.board-pane__list li.is-active .board-pane__item{border-color:transparent;background:var(--accent-gradient);color:var(--text-on-accent);box-shadow:var(--glow-brand)}.board-pane__list li.is-active .board-pane__item-meta{color:#ffffffd1}.board-pane__item{text-align:left;display:flex;flex-direction:column;gap:.15rem;padding:.55rem .7rem;width:100%;border-radius:var(--radius-sm);border:1px solid var(--line);background:#ffffff8c}.board-pane__item-title{font-size:.88rem;font-weight:600;line-height:1.25}.board-pane__item-meta{font-size:.7rem;color:var(--text-muted)}.board-pane__del{padding:0 .5rem;font-size:1.1rem;line-height:1;border-radius:var(--radius-sm)}.board-pane__status{margin-top:.75rem;font-size:.78rem;color:var(--text-muted);word-break:break-word}.board-pane__canvas-wrap{position:relative;min-width:0;min-height:0;height:100%;flex:1 1 auto;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:var(--bg-elevated);box-shadow:var(--shadow-md)}.board-pane__layout[style*="1fr"]{margin:.65rem;grid-template-columns:1fr}.board-canvas,.board-canvas>div{width:100%;height:100%;min-height:0}.board-pane__layout{height:100%}.board-canvas__loading,.board-pane__placeholder{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-secondary);padding:2rem;text-align:center}.board-pane__placeholder h2{margin:0 0 .5rem;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}.board-pane__live{color:var(--success);font-weight:650}.board-pane__offline{color:var(--text-muted)}.board-item__delete{color:var(--danger, #ef4444);border-color:color-mix(in srgb,var(--danger, #ef4444) 35%,transparent);background:color-mix(in srgb,var(--danger, #ef4444) 8%,#fff);font-weight:700;min-width:36px}.board-item__delete:hover{background:color-mix(in srgb,var(--danger, #ef4444) 16%,#fff)}.board-pane__owner-menu{position:relative}.board-pane__owner-menu summary{list-style:none;cursor:pointer;font-size:13px;font-weight:600;color:var(--text-secondary);padding:6px 12px;border-radius:var(--radius-full);border:1px solid var(--line);background:var(--glass-bg)}.board-pane__owner-menu[open] summary{border-color:var(--accent-primary)}.board-pane__owner-menu .menu-panel{position:absolute;right:0;top:calc(100% + 6px);z-index:20;min-width:220px;padding:8px;border-radius:var(--radius-md);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-lg);display:flex;flex-direction:column;gap:6px}.board-pane__layout--solo{display:flex!important;flex-direction:column;flex:1 1 auto;min-height:0;height:100%;margin:.65rem;grid-template-columns:none}:root{--accent-primary: #7c3aed;--accent-secondary: #8b5cf6;--accent-tertiary: #a78bfa;--accent-gradient: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 50%, #a78bfa 100%);--bg-deep: #f5f3ff;--bg-glass: rgba(255, 255, 255, .72);--bg-header: rgba(245, 243, 255, .8);--bg-elevated: #ffffff;--bg-soft: #ede9fe;--text-primary: #1e1b4b;--text-secondary: #4c4578;--text-muted: #9ca3af;--text-on-accent: #ffffff;--line: rgba(124, 58, 237, .14);--line-strong: rgba(124, 58, 237, .28);--shadow-sm: 0 1px 2px rgba(30, 27, 75, .06);--shadow-md: 0 8px 24px rgba(124, 58, 237, .12);--glow-brand: 0 0 24px rgba(124, 58, 237, .25);--glow-soft: 0 0 40px rgba(139, 92, 246, .18);--info: #6366f1;--warn: #d97706;--tip: #059669;--success: #16a34a;--radius-sm: 12px;--radius-md: 16px;--radius-lg: 24px;--radius-pill: 999px;--font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", system-ui, sans-serif;--mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;--font-size-base: 15px;--min-w: 1024px;--paper: var(--bg-deep);--paper-2: var(--bg-elevated);--ink: var(--text-primary);--ink-muted: var(--text-secondary);--accent: var(--accent-primary);--accent-soft: var(--bg-soft)}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--font);font-size:var(--font-size-base);color:var(--text-primary);background:radial-gradient(ellipse 80% 50% at 10% -10%,rgba(167,139,250,.35),transparent 55%),radial-gradient(ellipse 60% 40% at 90% 0%,rgba(124,58,237,.18),transparent 50%),var(--bg-deep);min-width:var(--min-w);-webkit-font-smoothing:antialiased;line-height:1.45}a{color:var(--accent-primary);text-decoration-thickness:1px;text-underline-offset:2px}a:hover{color:var(--accent-secondary)}button,input,select{font:inherit}button{cursor:pointer;border:1px solid var(--line-strong);background:var(--bg-glass);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);color:var(--text-primary);padding:.45rem 1rem;border-radius:var(--radius-pill);box-shadow:var(--shadow-sm);transition:background .15s ease,box-shadow .15s ease,transform .1s ease}button:hover:not(:disabled){box-shadow:var(--shadow-md)}button:active:not(:disabled){transform:translateY(1px)}button.primary{background:var(--accent-gradient);color:var(--text-on-accent);border-color:transparent;box-shadow:var(--glow-brand);font-weight:600}button.primary:hover:not(:disabled){box-shadow:var(--glow-soft),var(--shadow-md)}button.ghost{background:transparent;border-color:var(--line);box-shadow:none}button:disabled{opacity:.5;cursor:not-allowed}.desktop-gate{display:none;position:fixed;top:0;right:0;bottom:0;left:0;z-index:9999;background:var(--bg-deep);align-items:center;justify-content:center;padding:2rem;text-align:center;color:var(--text-primary)}.desktop-gate h1{background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}@media(max-width:1023px){.desktop-gate{display:flex}}.board-welcome-logo{font-weight:700;font-size:1.75rem;letter-spacing:-.02em;background:var(--accent-gradient);-webkit-background-clip:text;background-clip:text;color:transparent}.board-canvas a[href*="excalidraw.com"],.board-canvas a[href*="discord.gg"],.board-canvas a[href*="plus.excalidraw"],.board-canvas a[href*="libraries.excalidraw"]{display:none!important}.board-welcome-hint{margin:.5rem 0 0;max-width:280px;text-align:center;font-size:.9rem;color:var(--text-secondary);line-height:1.4}