:root{--accent-primary: #7c3aed;--accent-secondary: #8b5cf6;--accent-gradient: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 50%, #a78bfa 100%);--brand-glow-1: rgba(167, 139, 250, .35);--brand-glow-2: rgba(139, 92, 246, .25);--bg-deep: #f5f3ff;--text-primary: #1e1b4b;--text-secondary: #4c4578;--text-muted: #9ca3af;--danger: #ef4444;--glass-bg: rgba(255, 255, 255, .72);--glass-border: rgba(255, 255, 255, .8);--header-bg: rgba(245, 243, 255, .8);--card-bg: rgba(255, 255, 255, .8);--card-border: rgba(255, 255, 255, .9);--input-bg: rgba(255, 255, 255, .8);--input-bg-focus: rgba(255, 255, 255, .95);--input-border: rgba(0, 0, 0, .06);--line: rgba(30, 27, 75, .08);--line-strong: rgba(30, 27, 75, .14);--shadow-md: 0 4px 12px rgba(124, 58, 237, .08);--shadow-lg: 0 8px 24px rgba(124, 58, 237, .12);--shadow-xl: 0 16px 48px rgba(124, 58, 237, .16);--radius-md: 12px;--radius-lg: 16px;--radius-xl: 20px;--radius-2xl: 24px;--radius-full: 9999px;--font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", system-ui, sans-serif;color-scheme:light;font-family:var(--font);color:var(--text-primary);background:var(--bg-deep)}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}body{background:var(--bg-deep);background-image:radial-gradient(ellipse at 0% 0%,var(--brand-glow-1) 0%,transparent 50%),radial-gradient(ellipse at 100% 100%,var(--brand-glow-2) 0%,transparent 50%);background-attachment:fixed;font-size:15px;line-height:1.5;letter-spacing:-.01em;-webkit-font-smoothing:antialiased}button,input,select{font:inherit}::selection{color:#fff;background:var(--accent-primary)}:focus-visible{outline:2px solid var(--accent-primary);outline-offset:3px}.stack{display:flex;flex-direction:column;gap:16px}.auth__form{display:flex;flex-direction:column;gap:12px}.auth__field{display:flex;flex-direction:column;gap:6px}.auth__field .label{margin-bottom:0}.row{display:flex;justify-content:flex-end;gap:10px;margin-top:22px}.label{display:block;margin-bottom:8px;font-size:13px;font-weight:600;color:var(--text-secondary)}.eyebrow{margin:0 0 8px;font-size:12px;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--accent-primary)}.muted{color:var(--text-muted);font-size:14px}.error{color:var(--danger);font-size:14px;margin:0}.empty{padding:72px 20px;text-align:center;color:var(--text-muted);font-size:17px;font-weight:600}.field{width:100%;border:1px solid var(--input-border);background:var(--input-bg);border-radius:var(--radius-lg);padding:13px 14px;color:var(--text-primary);min-height:48px;transition:border-color .15s ease,box-shadow .15s ease,background .15s ease}.field:focus{outline:none;background:var(--input-bg-focus);border-color:color-mix(in srgb,var(--accent-primary) 45%,transparent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent-primary) 18%,transparent)}.field-search{max-width:440px;flex:1;min-width:0}.field-inline{min-width:180px;min-height:36px;padding:6px 10px}.btn{border:1px solid transparent;border-radius:var(--radius-full);min-height:44px;padding:0 18px;font-size:14px;font-weight:600;letter-spacing:-.01em;cursor:pointer;transition:background .15s ease,color .15s ease,border-color .15s ease,transform .15s ease,box-shadow .15s ease}.btn:disabled{opacity:.55;cursor:wait}.btn-primary{background:var(--accent-gradient);color:#fff;border-color:transparent;box-shadow:var(--shadow-md)}.btn-primary:hover:not(:disabled){filter:brightness(1.04)}.btn-ghost{background:var(--glass-bg);color:var(--text-primary);border-color:var(--line-strong)}.btn-ghost:hover:not(:disabled){background:#fff}.btn-block{width:100%;margin-top:10px}.icon-btn{border:0;background:transparent;width:36px;height:36px;border-radius:50%;font-size:20px;line-height:1;cursor:pointer;color:var(--text-muted)}.icon-btn:hover{background:#7c3aed14;color:var(--text-primary)}.phone-input{display:grid;grid-template-columns:minmax(148px,.9fr) 1.4fr;gap:8px}.check{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--text-secondary)}.check input[type=checkbox]{-webkit-appearance:none;-moz-appearance:none;appearance:none;width:20px;height:20px;margin:1px 0 0;flex:0 0 20px;border:1.5px solid var(--line-strong);border-radius:6px;background:#fff;cursor:pointer}.check input[type=checkbox]:checked{background:var(--accent-primary) url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='%23ffffff' stroke-width='2' d='M3.5 8.5 6.5 11.5 12.5 4.5'/></svg>") center / 12px no-repeat;border-color:var(--accent-primary)}.check-row{padding:10px 8px;border-radius:12px;cursor:pointer}.check-row:hover{background:#7c3aed0d}.auth{min-height:100dvh;display:grid;place-items:center;padding:28px 20px;background:radial-gradient(ellipse at 0% 0%,var(--brand-glow-1) 0%,transparent 50%),radial-gradient(ellipse at 100% 100%,var(--brand-glow-2) 0%,transparent 50%),var(--bg-deep)}.auth__card{width:min(400px,100%);background:var(--card-bg);backdrop-filter:blur(32px);-webkit-backdrop-filter:blur(32px);border:1px solid var(--card-border);border-radius:var(--radius-2xl);padding:28px 24px 24px;box-shadow:var(--shadow-xl)}.auth__brand{margin:0;font-size:24px;font-weight:700;letter-spacing:-.02em;line-height:1.15}.auth__lead{color:var(--text-muted);margin:6px 0 16px;font-size:14px}.auth__teacher{margin:8px 0 16px;font-size:17px;font-weight:650;letter-spacing:-.025em;line-height:1.25;color:var(--accent-primary)}.pick{text-align:left;border:1px solid var(--line);background:#fff;border-radius:var(--radius-lg);padding:14px 16px;display:flex;flex-direction:column;gap:4px;cursor:pointer}.pick:hover{border-color:color-mix(in srgb,var(--accent-primary) 40%,transparent)}.pick span{color:var(--text-muted);font-size:13px}.shell{min-height:100dvh;background:transparent}.top{position:sticky;top:0;z-index:5;min-height:64px;display:flex;align-items:center;justify-content:space-between;padding:10px 22px;border-bottom:1px solid var(--line);background:var(--header-bg);backdrop-filter:saturate(1.4) blur(24px);-webkit-backdrop-filter:saturate(1.4) blur(24px)}.top__brand{font-size:20px;font-weight:700;letter-spacing:-.02em}.top__who{display:flex;align-items:center;gap:14px}.top__name{font-size:14px;color:var(--text-secondary)}.lobby-layout{display:grid;grid-template-columns:260px minmax(0,1fr);min-height:100dvh}.lobby-layout--solo{grid-template-columns:1fr;display:flex;flex-direction:column}.lobby-sidebar-backdrop{display:none}.lobby-sidebar{position:sticky;top:0;align-self:start;height:100dvh;display:flex;flex-direction:column;padding:20px 14px 16px;border-right:1px solid var(--line);background:color-mix(in srgb,#fff 55%,var(--bg-deep));backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px)}.lobby-sidebar__head{display:flex;flex-direction:column;gap:4px;padding:0 10px 18px;border-bottom:1px solid var(--line);margin-bottom:12px}.lobby-sidebar__logo{font-size:20px;font-weight:700;letter-spacing:-.02em}.lobby-sidebar__badge{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.lobby-nav{flex:1;overflow:auto;display:flex;flex-direction:column;gap:2px;padding:4px 0;min-height:0}.lobby-nav__label{margin:8px 10px 6px;font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.lobby-nav__item{display:flex;align-items:center;gap:10px;width:100%;border:0;background:transparent;border-radius:var(--radius-lg);padding:10px 12px;text-align:left;cursor:pointer;color:var(--text-secondary);font-size:14px;font-weight:600;transition:background .15s ease,color .15s ease}.lobby-nav__item:hover{background:#7c3aed0f;color:var(--text-primary)}.lobby-nav__item.is-active{background:#7c3aed1f;color:var(--accent-primary)}.lobby-nav__icon{width:22px;text-align:center;font-size:15px;opacity:.85}.lobby-nav__dot{width:10px;height:10px;border-radius:50%;flex:0 0 10px}.lobby-nav__dot--muted{background:var(--line-strong)}.lobby-nav__text{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lobby-nav__count{font-size:12px;font-weight:600;color:var(--text-muted);min-width:1.5em;text-align:right}.lobby-nav__item.is-active .lobby-nav__count{color:color-mix(in srgb,var(--accent-primary) 70%,var(--text-muted))}.lobby-sidebar__foot{padding:12px 6px 0;border-top:1px solid var(--line);margin-top:8px}.lobby-user{display:flex;align-items:center;gap:10px;padding:8px 6px}.lobby-user__avatar{width:36px;height:36px;border-radius:50%;background:var(--accent-gradient);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700;flex:0 0 36px}.lobby-user__meta{min-width:0}.lobby-user__name{display:block;font-size:14px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lobby-user__role{display:block;font-size:12px;color:var(--text-muted)}.lobby-main{display:flex;flex-direction:column;min-width:0;min-height:100dvh}.lobby-main--center{flex:1;display:grid;place-items:center}.lobby-top{position:sticky;top:0;z-index:4;display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:14px 22px;border-bottom:1px solid var(--line);background:var(--header-bg);backdrop-filter:saturate(1.4) blur(24px);-webkit-backdrop-filter:saturate(1.4) blur(24px)}.lobby-top__menu{display:none}.lobby-top__titles{flex:1;min-width:140px}.lobby-top__title{margin:0;font-size:22px;font-weight:700;letter-spacing:-.02em;line-height:1.2}.lobby-top__sub{margin:2px 0 0;font-size:13px}.lobby-top__brand{font-size:20px;font-weight:700;flex:1}.lobby-top__actions{display:flex;align-items:center;gap:10px;flex:1 1 280px;justify-content:flex-end;min-width:0}.lobby-top__search{flex:1;max-width:320px;min-height:42px;padding:10px 14px}.lobby-tabs{display:flex;gap:6px;padding:12px 22px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.lobby-tabs::-webkit-scrollbar{display:none}.lobby-tab{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);background:#ffffffa6;border-radius:var(--radius-full);padding:8px 14px;font-size:13px;font-weight:600;color:var(--text-secondary);cursor:pointer;white-space:nowrap;transition:background .15s ease,border-color .15s ease,color .15s ease}.lobby-tab:hover{border-color:color-mix(in srgb,var(--accent-primary) 35%,transparent)}.lobby-tab.is-active{background:var(--accent-primary);border-color:var(--accent-primary);color:#fff}.lobby-tab__count{font-size:11px;font-weight:700;opacity:.85;min-width:1.2em;text-align:center}.lobby-tab:not(.is-active) .lobby-tab__count{color:var(--text-muted);opacity:1}.lobby-main__body{flex:1;padding:18px 22px 48px;overflow:auto}.lobby-main__error{margin:0 22px}.lobby-main__status{padding:24px 22px}.lobby-empty{display:flex;flex-direction:column;align-items:center;gap:16px;padding:48px 20px;text-align:center;color:var(--text-muted);font-size:15px;font-weight:600}.lobby-groups{display:flex;flex-direction:column;gap:28px}.lobby-group__title{margin:0 0 12px;font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--text-primary)}.card__subject{display:flex;align-items:center;gap:8px;margin:0 0 6px;font-size:12px;font-weight:600;color:var(--text-muted)}.card__subject-dot{width:8px;height:8px;border-radius:50%;flex:0 0 8px}.card__audience{margin:8px 0 0;font-size:13px;font-weight:600;color:var(--text-secondary)}.chip-subject{position:relative;padding-left:22px}.chip-subject:before{content:"";position:absolute;left:8px;top:50%;width:8px;height:8px;border-radius:50%;transform:translateY(-50%);background:var(--subject, var(--accent-primary))}.chip-on{background:var(--accent-primary);color:#fff;border-color:var(--accent-primary)}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.card{position:relative;background:var(--card-bg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--card-border);border-radius:var(--radius-2xl);min-height:156px;box-shadow:var(--shadow-md);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.card:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--accent-primary) 28%,transparent);box-shadow:var(--shadow-lg)}.card__main{display:block;padding:22px 48px 20px 22px;color:inherit;text-decoration:none}.card__main h2{margin:0 0 8px;font-size:18px;font-weight:700;letter-spacing:-.02em;line-height:1.25}.card__more{position:absolute;top:10px;right:10px}.menu{position:absolute;right:0;top:36px;background:#fffffff5;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-xl);display:flex;flex-direction:column;min-width:176px;overflow:hidden;z-index:3}.menu button{border:0;background:transparent;text-align:left;padding:12px 14px;font:inherit;cursor:pointer}.menu button:hover{background:#7c3aed0f}.menu .danger{color:var(--danger)}.chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}.chip{border:1px solid var(--line);background:#fff;border-radius:var(--radius-full);padding:5px 11px;font-size:12px;font-weight:600;cursor:pointer;color:var(--text-primary)}.chip:hover{border-color:color-mix(in srgb,var(--accent-primary) 40%,transparent)}.chip-soft{cursor:default;background:#7c3aed0f;border-color:transparent;color:var(--text-secondary)}.people{display:flex;flex-direction:column;gap:16px;margin-top:8px}.people__list{max-height:260px;overflow:auto;display:flex;flex-direction:column;padding:4px;border:1px solid var(--line);border-radius:var(--radius-lg);background:#fff}.modal{position:fixed;top:0;right:0;bottom:0;left:0;background:#1e1b4b47;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);display:grid;place-items:center;padding:16px;z-index:20}.modal__box{width:min(500px,100%);max-height:min(88dvh,760px);overflow:auto;background:#fff;border:1px solid var(--card-border);border-radius:var(--radius-2xl);padding:28px 24px 22px;box-shadow:var(--shadow-xl)}.modal__box h2{margin:0 0 18px;font-size:20px;font-weight:700;letter-spacing:-.02em;line-height:1.2}.board{height:100dvh;display:flex;flex-direction:column;background:var(--bg-deep)}.board .strip{position:relative;z-index:3}.desk-editor-frame{position:fixed;border:0;background:#fff;z-index:1}body:not(.desk-on-board) .desk-editor-frame{width:min(100vw,1440px);height:min(100vh,900px);opacity:0;pointer-events:none;left:-12000px;top:0;visibility:hidden}body.desk-on-board .desk-editor-frame{top:48px;left:0;right:0;bottom:0;width:100%;height:calc(100dvh - 48px);opacity:1;pointer-events:auto}.strip{height:48px;flex:0 0 48px;display:flex;align-items:center;gap:12px;padding:0 12px;background:var(--header-bg);color:var(--text-primary);border-bottom:1px solid var(--line);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px)}.strip__back{color:var(--accent-primary);text-decoration:none;font-size:14px;font-weight:600}.strip__back:hover{opacity:.8}.strip__title,.strip__title-form{flex:1;min-width:0}.strip__title{border:0;background:transparent;color:inherit;font-size:16px;font-weight:700;text-align:left;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.strip__people{display:flex;align-items:center;gap:6px}.avatar{width:28px;height:28px;border-radius:50%;background:color-mix(in srgb,var(--accent-primary) 14%,#fff);color:var(--accent-primary);display:grid;place-items:center;font-size:12px;font-weight:700}.avatar-add{border:0;color:#fff;background:var(--accent-gradient);cursor:pointer}.board__frame{flex:1;width:100%;border:0;background:#fff}.strip-error{background:var(--danger);color:#fff;padding:6px 12px;font-size:13px}@media(max-width:900px){.lobby-layout{grid-template-columns:1fr}.lobby-sidebar-backdrop{display:block;position:fixed;top:0;right:0;bottom:0;left:0;z-index:8;background:#1e1b4b59;opacity:0;pointer-events:none;transition:opacity .2s ease}.lobby-layout--sidebar-open .lobby-sidebar-backdrop{opacity:1;pointer-events:auto}.lobby-sidebar{position:fixed;left:0;top:0;z-index:9;width:min(280px,88vw);transform:translate(-105%);transition:transform .22s ease;box-shadow:var(--shadow-xl)}.lobby-layout--sidebar-open .lobby-sidebar{transform:translate(0)}.lobby-top__menu{display:grid}.lobby-top__actions{flex:1 1 100%;justify-content:stretch}.lobby-top__search{max-width:none}}@media(max-width:640px){.phone-input{grid-template-columns:1fr}.auth__card,.modal__box{border-radius:22px;padding:24px 18px 18px}.top{padding:10px 14px}.lobby-top{padding:12px 14px}.lobby-main__body{padding:14px 14px 40px}.lobby-tabs{padding:10px 14px 0}.card__main h2{font-size:17px}.modal__box h2{font-size:18px}}