@font-face{font-family:PTSans;src:url("../fonts/PTSans-Regular.ttf") format("truetype");font-style:normal;font-weight:400;font-display:swap}
.real-course-player{position:relative;aspect-ratio:16/9;background:#142126;border-radius:18px;overflow:hidden}.real-course-player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.real-course-description{display:grid;gap:16px;overflow-wrap:anywhere}.real-course-description p{white-space:pre-line}.real-course-lesson{display:block;width:100%;text-align:left;padding:12px 22px 12px 48px;border:0;border-bottom:1px solid var(--line);background:white;color:var(--muted);line-height:1.35;min-height:44px}.real-course-lesson.active{background:var(--soft);color:var(--ink);font-weight:700}[data-live-course] .lesson-layout>*{min-width:0}[data-live-course] .lesson-list .lesson{white-space:normal;overflow-wrap:anywhere}
@font-face{font-family:Trajan;src:url("../fonts/TrajanPro3Bold.woff2") format("woff2"),url("../fonts/TrajanPro3Bold.woff") format("woff");font-style:normal;font-weight:700;font-display:swap}
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.shell{max-width:1760px;margin:auto;display:grid;grid-template-columns:246px minmax(0,1fr);min-height:100dvh}.side{position:sticky;top:0;height:100dvh;padding:28px 20px;border-right:1px solid var(--line);display:flex;flex-direction:column;background:#edf2f4}.brand{font-family:Georgia,serif;letter-spacing:-.04em;font-size:1.65rem;font-weight:700;text-decoration:none;display:block;padding:0 12px}.brand small{display:block;font-family:Arial,sans-serif;font-weight:400;font-size:.73rem;letter-spacing:.16em;margin-top:7px}.side nav{display:grid;gap:5px;margin-top:38px}.nav-btn{display:flex;align-items:center;text-align:left;gap:12px;border:0;background:transparent;border-radius:12px;padding:13px 14px;min-height:48px;color:#4b5c63;font-size:.92rem}.nav-btn.active{background:var(--ink);color:white}.nav-btn:not(.active):hover{background:#dfe8ec}.icon{width:20px;height:20px;flex-shrink:0;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}.nav-note{margin:26px 12px 12px}.side-bottom{margin-top:auto;padding:30px 10px 4px}.profile{display:flex;gap:10px;align-items:center}.profile .avatar{width:36px;height:36px}.side-bottom a{font-size:.82rem;display:inline-block;margin-top:18px;color:var(--muted)}.beta{font-size:.68rem;background:#f5e9d5;color:#775214;padding:4px 6px;border-radius:5px;line-height:1;margin-left:auto}
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@media(max-width:620px){.chat-bar{padding:8px;gap:8px}.chat-bar>strong{font-size:0}.chat-bar>strong::after{content:"Clear Aligners";font-size:.85rem;white-space:nowrap}.chat-bar>.toolbar{flex-wrap:nowrap;gap:6px}.chat-bar [data-action="messagesPage"]{font-size:.7rem;padding:8px;min-height:38px}.chat-bar [data-action="closeChat"]{padding:8px;min-width:38px;min-height:38px}.topbar a[href*="device=mobile"]{display:none}}
.device-preview{padding:20px;display:flex;flex-direction:column;align-items:center;gap:20px;min-height:100dvh;background:#e3eaee}.device-preview>header{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;max-width:850px;font-size:.9rem}.device-preview>iframe{width:390px;max-width:100%;height:844px;max-height:calc(100dvh - 110px);border:1px solid #acbdc5;border-radius:24px;box-shadow:0 16px 60px #19313e30;background:white}
.brand{font-family:Trajan,serif;font-size:1.35rem;letter-spacing:-.03em}.brand small{font-family:PTSans,sans-serif}.promo{background:var(--surface);border-color:var(--line)}.promo-link{display:flex;align-items:center;gap:8px;min-height:44px;font-weight:700;text-decoration:none}.promo-link:hover{text-decoration:underline}.promo-link .beta{margin-left:0}.promo-link .icon{margin-left:auto}.promo p{font-size:.88rem;color:var(--muted);margin:8px 0 0}.help-card>.button{margin-top:18px}.lesson-content>h2+.toolbar{margin-top:14px}