.grm-shell{display:grid;grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 80px);background:#090909;color:#fff;font-family:inherit}.grm-sidebar{background:#111;border-right:1px solid #292929;padding:28px 20px;display:flex;flex-direction:column;gap:22px}.grm-brand{font-weight:800;letter-spacing:.04em}.grm-brand b{color:#ff2121}.grm-progress{display:grid;grid-template-columns:1fr auto;gap:8px;color:#aaa;font-size:13px}.grm-progress strong{color:#fff}.grm-progress i{grid-column:1/-1;height:5px;background:#333;border-radius:5px;overflow:hidden}.grm-progress em{display:block;height:100%;background:#ff2121}.grm-sidebar nav h2{font-size:14px;margin:0 0 10px;color:#aaa}.grm-sidebar nav a{display:flex;gap:10px;align-items:flex-start;color:#ccc;text-decoration:none;padding:10px 9px;border-left:2px solid transparent;font-size:14px;line-height:1.35}.grm-sidebar nav a:hover,.grm-sidebar nav a.is-current{color:#fff;background:#1b1b1b;border-left-color:#ff2121}.grm-sidebar nav a.is-done span{color:#ff2121}.grm-logout{color:#aaa;text-decoration:none;margin-top:auto;font-size:14px}.grm-main{padding:44px clamp(24px,6vw,90px);max-width:1100px;width:100%;box-sizing:border-box}.grm-crumb{color:#888;font-size:13px;margin-bottom:18px}.grm-main h1{font-size:clamp(28px,4vw,48px);margin:0 0 24px}.grm-player-wrap{background:#141414;border-radius:8px;padding:10px;box-shadow:0 12px 40px #000}.grm-player{position:relative;aspect-ratio:16/9;background:#000;overflow:hidden;border-radius:5px}.grm-player video{width:100%;height:100%;display:block}.grm-watermark{position:absolute;z-index:5;pointer-events:none;color:rgba(255,255,255,.64);background:rgba(0,0,0,.24);padding:5px 8px;border-radius:3px;font:600 12px/1.2 Arial,sans-serif;letter-spacing:.02em;user-select:none}.grm-empty{aspect-ratio:16/9;display:grid;place-items:center;color:#999}.grm-description{color:#aaa;margin:20px 0}.grm-complete,.grm-login a{background:#ff2121;border:0;color:#fff;padding:13px 18px;border-radius:5px;font-weight:700;cursor:pointer;text-decoration:none}.grm-menu-toggle{display:none;background:#1c1c1c;color:#fff;border:1px solid #333;padding:12px;border-radius:5px}@media(max-width:760px){.grm-shell{display:block}.grm-sidebar{border:0;padding:18px;position:relative}.grm-menu-toggle{display:block;text-align:left}.grm-sidebar nav{display:none}.grm-sidebar nav.is-open{display:block}.grm-main{padding:24px 16px}.grm-player-wrap{padding:5px}.grm-sidebar nav a{padding:12px 8px}.grm-watermark{font-size:11px}}
.grm-player:fullscreen{width:100vw;height:100vh;background:#000}.grm-player:fullscreen video{object-fit:contain}.grm-player:fullscreen .grm-watermark{z-index:2147483647}
.grm-login{padding:80px 24px;background:#090909;color:#fff;min-height:50vh}.grm-login a{display:inline-block;margin-top:18px}.grm-fullscreen{position:absolute;right:14px;bottom:14px;z-index:5;border:1px solid rgba(255,255,255,.35);background:rgba(0,0,0,.65);color:#fff;border-radius:6px;width:40px;height:36px;font-size:22px;cursor:pointer}.grm-fullscreen:focus{outline:2px solid #ff2121;outline-offset:2px}.grm-player:fullscreen{background:#000;display:flex;align-items:center;justify-content:center}.grm-player:fullscreen video{max-height:100vh}.grm-player:fullscreen .grm-watermark{z-index:10}
.grm-player .grm-fullscreen{appearance:none;-webkit-appearance:none;border:0;outline:0;background-color:rgba(10,10,10,.72);background-image:none;color:#fff;display:inline-flex;align-items:center;justify-content:center;line-height:1;width:40px;height:40px;min-width:40px;min-height:40px;padding:0;margin:0;position:absolute;right:16px;bottom:58px;z-index:20;border-radius:10px;font-size:0;font-family:inherit;box-shadow:none;transform:none;transition:background-color .16s ease,color .16s ease,transform .16s ease;pointer-events:auto}
.grm-player .grm-fullscreen:hover,.grm-player .grm-fullscreen:focus-visible{background-color:#FF2121;color:#fff}
.grm-player .grm-fullscreen:focus{outline:2px solid #FF2121;outline-offset:2px}
.grm-player .grm-fullscreen::before{content:'';display:block;width:19px;height:19px;background-repeat:no-repeat;background-position:center;background-size:contain;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 3H3v5M16 3h5v5M8 21H3v-5M21 16v5h-5'/%3E%3C/svg%3E")}
.grm-player:fullscreen .grm-fullscreen::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 3v6H3M15 3v6h6M9 21v-6H3M21 15h-6v6'/%3E%3C/svg%3E")}
.grm-player .grm-fullscreen::after{display:none!important;content:none!important}
@media(max-width:760px){.grm-player .grm-fullscreen{width:44px;height:44px;min-width:44px;min-height:44px;right:12px;bottom:58px;border-radius:10px}}
/* Align the custom control with the native fullscreen slot without covering the menu. */
.grm-player .grm-fullscreen{right:44px;bottom:6px;width:36px;height:36px;min-width:36px;min-height:36px;padding:0;margin:0;background:transparent;color:#fff;border:0;border-radius:6px;box-shadow:none;font-size:0;z-index:30}
.grm-player .grm-fullscreen:hover,.grm-player .grm-fullscreen:focus-visible{background:#FF2121;color:#fff;border:0}
.grm-player .grm-fullscreen:focus{outline:2px solid #FF2121;outline-offset:1px}
.grm-player .grm-fullscreen::before{width:18px;height:18px;color:currentColor;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M8 3H3v5M16 3h5v5M8 21H3v-5M21 16v5h-5'/%3E%3C/svg%3E")}
.grm-player:fullscreen .grm-fullscreen{right:44px;bottom:6px;width:36px;height:36px;min-width:36px;min-height:36px;background:transparent;color:#fff;border:0;border-radius:6px}
.grm-player:fullscreen .grm-fullscreen::before{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 3v6H3M15 3v6h6M9 21v-6H3M21 15h-6v6'/%3E%3C/svg%3E")}
@media(max-width:760px){.grm-player .grm-fullscreen,.grm-player:fullscreen .grm-fullscreen{right:42px;bottom:5px;width:40px;height:40px;min-width:40px;min-height:40px}}
/* Chromium/WebKit exposes fullscreen as a separate native control; keep other controls intact. */
.grm-player video::-webkit-media-controls-fullscreen-button{display:none!important}
.grm-player .grm-fullscreen,.grm-player:fullscreen .grm-fullscreen{position:absolute;top:14px;right:14px;bottom:auto;width:40px;height:40px;min-width:40px;min-height:40px;padding:0;margin:0;z-index:20;background:rgba(0,0,0,.58);color:#fff;border:0;border-radius:8px;box-shadow:none}
.grm-player .grm-fullscreen:hover,.grm-player .grm-fullscreen:focus-visible,.grm-player:fullscreen .grm-fullscreen:hover,.grm-player:fullscreen .grm-fullscreen:focus-visible{background:#FF2121;color:#fff;border:0}
.grm-player .grm-fullscreen:focus,.grm-player:fullscreen .grm-fullscreen:focus{outline:2px solid #FF2121;outline-offset:1px}
.grm-player .grm-fullscreen::before{color:#fff}
@media(max-width:760px){.grm-player .grm-fullscreen,.grm-player:fullscreen .grm-fullscreen{top:14px;right:14px;bottom:auto;width:44px;height:44px;min-width:44px;min-height:44px;border-radius:8px}}
.grm-fullscreen-button,.grm-fullscreen{color:#fff!important}
.grm-fullscreen-button svg,.grm-fullscreen svg{stroke:#fff!important;color:#fff!important;fill:none!important}
.grm-fullscreen-button svg *,.grm-fullscreen svg *{stroke:currentColor!important}
.grm-fullscreen::before{display:none!important;content:none!important;background-image:none!important}
.grm-fullscreen .grm-fullscreen-icon{display:block;width:18px;height:18px;color:#fff!important;stroke:#fff!important;fill:none!important}
.grm-fullscreen .grm-fullscreen-icon *{stroke:currentColor!important;fill:none!important}
.grm-course-select{position:relative;min-height:calc(100vh - 80px);box-sizing:border-box;background:#090909;color:#fff;padding:clamp(48px,8vh,96px) 24px 96px;display:flex;justify-content:center}.grm-course-select-inner{width:min(100%,1060px)}.grm-course-select h1{text-align:center;font-size:clamp(32px,5vw,54px);margin:0 0 44px;font-weight:800}.grm-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}.grm-course-card{display:flex;aspect-ratio:1/1;align-items:center;justify-content:center;overflow:hidden;background:#000;border:1px solid #292929;border-radius:14px;transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease}.grm-course-card:hover,.grm-course-card:focus-visible{border-color:#FF2121;transform:translateY(-2px);box-shadow:0 8px 24px rgba(255,33,33,.12);outline:0}.grm-course-card img{display:block;width:100%;height:100%;object-fit:contain}.grm-course-description{min-height:72px;max-width:820px;margin:30px auto 0;text-align:center;color:#eee;line-height:1.65;opacity:0;transition:opacity .22s ease}.grm-course-description.is-visible{opacity:1}.grm-select-logout{position:absolute;left:24px;bottom:24px}.grm-course-switch{display:block;text-align:center;color:#fff;text-decoration:none;border:1px solid #FF2121;border-radius:5px;padding:11px 14px;margin-top:auto;transition:background-color .2s ease}.grm-course-switch:hover,.grm-course-switch:focus-visible{background:#FF2121;color:#fff;outline:0}.grm-challenge-main{display:flex;flex-direction:column}.grm-challenge-identity{flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;min-height:380px}.grm-challenge-identity h1{margin:0 0 18px}.grm-challenge-identity p{color:#aaa;font-size:18px}.grm-challenge-nav h2{color:#aaa;font-size:14px;font-weight:600}.grm-challenge-shell .grm-sidebar{min-height:calc(100vh - 80px)}
@media(max-width:760px){.grm-course-select{padding:36px 16px 90px}.grm-course-select h1{margin-bottom:28px}.grm-course-grid{grid-template-columns:1fr;gap:18px}.grm-course-card{aspect-ratio:1.25/1}.grm-select-logout{left:16px;bottom:18px}.grm-challenge-shell .grm-sidebar{min-height:auto}.grm-challenge-identity{min-height:280px}}
@media(prefers-reduced-motion:reduce){.grm-course-card,.grm-course-description,.grm-course-switch{transition:none}}
.grm-course-selector,.grm-course-selector *{box-sizing:border-box}.grm-course-selector{min-height:calc(100vh - var(--header-height,72px));background:#000;color:#fff;position:relative;padding:clamp(40px,6vw,84px) 24px 72px;width:100%;overflow:hidden}.grm-course-selector__inner{width:min(1180px,100%);margin:0 auto}.grm-course-selector h1{margin:0 0 42px;color:#fff;text-align:center;font-family:inherit;font-size:clamp(36px,5vw,64px);line-height:1.05;font-weight:700}.grm-course-selector .grm-course-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:clamp(22px,3vw,38px);align-items:stretch}.grm-course-selector .grm-course-card{appearance:none;width:100%;min-width:0;min-height:300px;height:auto;padding:clamp(24px,3vw,38px);display:flex;align-items:center;justify-content:center;background:#0b0b0b;border:1px solid #242424;border-radius:22px;overflow:hidden;cursor:pointer;transition:border-color 220ms ease,transform 220ms ease,box-shadow 220ms ease,background-color 220ms ease}.grm-course-selector .grm-course-card:hover,.grm-course-selector .grm-course-card:focus-visible{border-color:#FF2121;background:#0e0e0e;transform:translateY(-3px);box-shadow:0 14px 44px rgba(255,33,33,.12);outline:none}.grm-course-selector .grm-course-card img{display:block;width:100%;max-width:480px;height:auto;max-height:260px;object-fit:contain;margin:0 auto;min-width:0}.grm-course-selector .grm-course-description{width:min(760px,100%);min-height:78px;margin:30px auto 0;color:#fff;text-align:center;font-size:clamp(16px,1.5vw,19px);line-height:1.6;opacity:0;transition:opacity 220ms ease}.grm-course-selector .grm-course-description.is-visible{opacity:1}.grm-course-selector .grm-selector-logout{position:absolute;left:24px;bottom:24px;margin:0}.grm-course-selection-page footer{display:none!important}
@media(max-width:767px){.grm-course-selector{padding:40px 16px 78px}.grm-course-selector .grm-course-grid{grid-template-columns:1fr}.grm-course-selector .grm-course-card{min-height:220px;padding:22px;border-radius:18px}.grm-course-selector .grm-course-card img{max-width:360px;max-height:190px}.grm-course-selector .grm-selector-logout{left:16px;bottom:18px}}
.grm-course-selector .grm-course-description{width:min(760px,calc(100% - 32px));min-height:84px;margin:28px auto 0;color:#fff;text-align:center;font-size:clamp(16px,1.4vw,19px);line-height:1.55;opacity:0;transform:translateY(4px);visibility:visible;height:auto;overflow:visible;transition:opacity 220ms ease,transform 220ms ease}.grm-course-selector .grm-course-description.is-visible{opacity:1;transform:translateY(0);visibility:visible;height:auto}
.grm-course-selector{min-height:calc(100vh - var(--header-height,72px));display:flex;flex-direction:column;justify-content:center;padding:32px 24px 84px;box-sizing:border-box}.grm-course-selector__inner{width:min(1120px,100%);margin:0 auto}.grm-course-selector h1{margin:0 0 26px;font-size:clamp(34px,4.4vw,58px);line-height:1.05;text-align:center;color:#fff}.grm-course-selector .grm-course-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.grm-course-selector .grm-course-card{min-height:230px;height:230px;padding:22px;border-radius:22px}.grm-course-selector .grm-course-card img{width:100%;max-width:330px;max-height:160px;object-fit:contain;display:block;margin:0 auto}.grm-course-selector .grm-course-description{width:min(760px,100%);min-height:72px;height:72px;margin:18px auto 0;font-size:clamp(15px,1.2vw,18px);line-height:1.55}.grm-course-selector .grm-selector-logout{position:absolute;left:24px;bottom:20px}
@media(max-width:767px){.grm-course-selector{display:block;padding:40px 16px 78px;min-height:calc(100vh - var(--header-height,72px))}.grm-course-selector .grm-course-grid{grid-template-columns:1fr;gap:18px}.grm-course-selector .grm-course-card{min-height:220px;height:220px;padding:22px}.grm-course-selector .grm-course-card img{max-width:360px;max-height:190px}.grm-course-selector .grm-course-description{height:auto;min-height:84px;margin-top:18px}.grm-course-selector .grm-selector-logout{left:16px;bottom:18px}}
.grm-course-selector{justify-content:center}.grm-course-selector .grm-course-description{width:min(920px,100%);height:96px;min-height:96px;margin:22px auto 0;display:flex;align-items:flex-start;justify-content:center;text-align:center;overflow:visible;opacity:0;transform:translateY(4px);transition:opacity 220ms ease,transform 220ms ease}.grm-course-selector .grm-course-description__text{width:100%;margin:0}.grm-course-selector .grm-course-description.is-visible{opacity:1;transform:translateY(0)}
@media(max-width:767px){.grm-course-selector .grm-course-description{height:96px;min-height:96px;margin-top:18px;overflow:visible}}
.grm-main{transition:opacity 160ms ease}.grm-main.grm-lesson-loading{opacity:.58}.grm-main.grm-lesson-error{opacity:1}
.grm-shell .grm-sidebar{min-height:calc(100vh - var(--header-height,54px));display:flex;flex-direction:column}.grm-sidebar__footer{margin-top:auto;padding-top:24px;display:flex;flex-direction:column;gap:14px}.grm-switch-course,.grm-course-switch{display:inline-flex;align-items:center;justify-content:center;width:100%;min-height:54px;padding:12px 18px;box-sizing:border-box;color:#fff;background:#000;border:1px solid #FF2121;border-radius:6px;text-align:center;text-decoration:none;transition:background-color 180ms ease,border-color 180ms ease}.grm-switch-course:hover,.grm-switch-course:focus-visible,.grm-course-switch:hover,.grm-course-switch:focus-visible{color:#fff;background:#FF2121;border-color:#FF2121;outline:none}.grm-sidebar__footer .grm-logout{margin-top:0}.grm-challenge-shell .grm-course-switch{margin-top:auto}.grm-challenge-shell .grm-logout{margin-top:0}