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var(--border);background:var(--surface);text-align:center;font-size:11px}@media (max-width: 720px){:root{--header-h: 56px}.app{padding:0 14px}.header-subtitle{display:none}.header-logo{flex-basis:31px;width:31px;height:31px}.header-title{font-size:13px}.header-quiz-btn{width:34px;padding:0;font-size:0}.welcome{padding:36px 4px 180px}.welcome-name{font-size:34px;line-height:1.08}.welcome-msg{font-size:14px}.starters{grid-template-columns:1fr}.starter-btn{min-height:58px}.chat-main{padding:22px 2px 176px}.msg-row{gap:7px;margin-bottom:18px}.msg-avatar{flex-basis:25px;width:25px;height:25px;border-radius:7px}.msg-body{max-width:84%}.msg-bubble{padding:10px 12px;font-size:13px}.input-area{right:8px;bottom:8px;left:8px}.input-row{gap:4px;padding:7px}.input-field{padding-inline:5px;font-size:12px}.attach-btn,.send-btn{width:31px;height:31px}.achievements{right:10px;bottom:88px;left:10px}.achievements-label,.milestone-progress-label{display:none}.anon-quota-bar{right:8px;bottom:82px;left:8px}.auth-modal-backdrop{padding:12px}.auth-modal-backdrop .welcome-card,.welcome:has(.auth-form) .welcome-card{padding:23px}}@media (max-width: 430px){.notebook-toggle-btn,.theme-btn,.sidebar-toggle-btn,.header-signout-btn{width:31px;height:31px}.header-signin-btn{min-height:31px;padding-inline:10px}.welcome-name{font-size:31px}.welcome-partner-text{max-width:280px}.badges-row .badge:nth-child(n+5){display:none}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}