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h2{font-size:.9rem;margin:0;color:#1e293b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.youtalk-unit-nav-mobile:not(.show) .youtalk-unit-panel{display:none!important}.youtalk-collapsed-badge{display:inline-flex;align-items:center;gap:.25rem;padding:.25rem .5rem;background:#2b82c51a;color:#2b82c5;border-radius:6px;font-size:.75rem;font-weight:500;white-space:nowrap;flex-shrink:0;border:1px solid rgba(43,130,197,.2)}.youtalk-collapsed-badge--level{background:#a855f71a;color:#7c3aed;border-color:#a855f733}.youtalk-collapsed-badge--unit{background:#22c55e1a;color:#16a34a;border-color:#22c55e33}.youtalk-collapsed-badge--class{background:#f973161a;color:#ea580c;border-color:#f9731633}.youtalk-unit-level-badge-mobile{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:linear-gradient(135deg,#2b82c5,#4da4d6);color:#fff;border-radius:50%;font-size:.75rem;font-weight:700;text-transform:uppercase;box-shadow:0 2px 8px #2b82c54d;border:none;cursor:pointer;padding:0;flex-shrink:0}.youtalk-unit-number-mobile{display:flex;align-items:center;justify-content:center;width:24px;height:24px;background:#2b82c51f;color:#2b82c5;border-radius:6px;font-size:.75rem;font-weight:600;border:none;cursor:pointer;padding:0;flex-shrink:0}.youtalk-unit-number-mobile--completed{background:#10b9812e;color:#047857}.youtalk-expand-arrow{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background:#2b82c51a;color:#2b82c5;border-radius:6px;border:none;cursor:pointer;transition:all .2s ease;margin-left:auto;flex-shrink:0}.youtalk-expand-arrow:hover{background:#2b82c52e;transform:scale(1.05)}.youtalk-collapsed-classes-mobile{display:flex;gap:.25rem;align-items:center}.youtalk-collapsed-class-mobile{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:none;border-radius:6px;background:#f1f5f9e6;color:#5b7f99;cursor:pointer;transition:all .2s ease;font-size:.75rem;font-weight:600;flex-shrink:0}.youtalk-collapsed-class-mobile:not(.youtalk-collapsed-class-mobile--completed):hover{background:#2b82c51f;color:#2b82c5;transform:scale(1.04)}.youtalk-collapsed-class-mobile--active:not(.youtalk-collapsed-class-mobile--completed){background:#2b82c5;color:#fff;box-shadow:0 2px 8px #2b82c54d}.youtalk-collapsed-class-mobile--completed{background:linear-gradient(135deg,#10b981,#059669);color:#fff;box-shadow:0 4px 12px #10b98159;transform:none}.youtalk-collapsed-class-mobile--completed:hover{background:linear-gradient(135deg,#10b981,#059669);color:#fff;transform:scale(1.05)}.youtalk-unit-nav-mobile.show .youtalk-collapsed-badges{display:none!important}.youtalk-unit-backdrop{position:fixed;inset:0;background:#00000080;z-index:1000;opacity:0;pointer-events:none;transition:opacity .3s ease;display:none!important;visibility:hidden!important}.youtalk-unit-backdrop.show{display:block!important;visibility:visible!important;opacity:1;pointer-events:auto}.youtalk-shell-main{max-width:100vw!important;overflow-x:hidden!important;width:100%!important;display:flex!important;flex-direction:column!important;box-sizing:border-box!important;padding-left:.75rem!important;padding-right:.75rem!important;padding-top:0!important}.youtalk-unit-panel{max-width:100%;box-sizing:border-box}.youtalk-unit-nav-mobile.show .youtalk-unit-panel{padding:1rem;overflow-y:auto;max-height:calc(100vh - 80px);-webkit-overflow-scrolling:touch}.youtalk-unit-nav-mobile.show .youtalk-unit-panel__content{display:flex;flex-direction:column;gap:.75rem}.youtalk-unit-nav-mobile.show .youtalk-unit-nav__unit{margin-bottom:.5rem}.youtalk-unit-nav-mobile.show .youtalk-unit-nav__unit-classes{max-height:none;overflow:visible}.youtalk-class-full-layout{max-width:100%!important;overflow-x:hidden!important;display:flex!important;flex-direction:column!important;gap:1.5rem!important}.youtalk-class-left,.youtalk-class-pdf-full{max-width:100%!important;width:100%!important;box-sizing:border-box!important;flex-shrink:0!important;position:relative!important}.youtalk-pdf-container,.youtalk-video-player,.youtalk-video-section,.youtalk-pdf-section{max-width:100%!important;width:100%!important;box-sizing:border-box!important;position:relative!important}.youtalk-class-left{order:1;margin-bottom:1rem!important}.youtalk-class-pdf-full{order:2;margin-top:1rem!important;clear:both!important;flex:1!important;display:flex!important;flex-direction:column!important;min-height:400px!important}.youtalk-audio-section{margin-top:1rem!important;margin-bottom:1rem!important;z-index:1!important;position:relative!important}.youtalk-audio-section{max-width:100%!important;overflow-x:hidden!important}.custom-audio-player{max-width:100%!important;box-sizing:border-box!important}iframe,video,.youtalk-pdf-viewer{max-width:100%!important;width:100%!important;height:auto!important;box-sizing:border-box!important}.youtalk-pdf-viewer{min-height:300px!important}.youtalk-video-player{aspect-ratio:16/9!important;height:auto!important}.audio-controls{flex-wrap:wrap!important;gap:.5rem!important}.audio-info{flex:1 1 100%!important;min-width:0!important}.youtalk-units-toggle-mobile,.youtalk-mobile-backdrop,.youtalk-unit-backdrop,.youtalk-side-nav-mobile,.youtalk-unit-nav-mobile,.youtalk-hamburger-left,.youtalk-header-logo{display:block!important}.youtalk-units-toggle-mobile,.youtalk-hamburger-left{display:inline-flex}.youtalk-header-logo{display:flex}.youtalk-shell-header{padding:.75rem 1rem!important;display:flex!important;justify-content:space-between!important;align-items:center!important;width:100%!important;box-sizing:border-box!important;height:auto!important;min-height:56px!important;background:#fff!important;border-bottom:1px solid rgba(148,163,184,.1)!important}.youtalk-hamburger-left{flex:0 0 auto!important;margin-right:auto!important;z-index:1050!important;position:relative!important;pointer-events:auto!important;background:#2b82c51a!important;color:#2b82c5!important;border-radius:10px!important;width:2.75rem!important;height:2.75rem!important;align-items:center!important;justify-content:center!important;cursor:pointer!important;transition:all .2s ease!important;border:1px solid rgba(43,130,197,.3)!important;box-shadow:0 2px 8px #2b82c51a!important;display:inline-flex!important}.youtalk-header-logo{flex:0 0 auto!important;display:flex!important;align-items:center!important;justify-content:center!important;position:absolute!important;left:50%!important;transform:translate(-50%)!important}.youtalk-header-logo img{height:28px!important;width:auto!important}.youtalk-hamburger-left:hover{background:#2b82c52e!important;transform:scale(1.05)!important;box-shadow:0 4px 12px #2b82c533!important}.youtalk-shell-header__title{display:none!important}.youtalk-shell-main{padding-top:0}.youtalk-unit-panel{padding:1rem}.youtalk-unit-panel__header{margin-bottom:1rem}.youtalk-pdf-container{position:relative;height:100%;min-height:300px;overflow:visible;border-radius:.5rem;margin:0}.youtalk-pdf-viewer{width:100%;height:100%;min-height:300px;border:none;border-radius:.5rem}.youtalk-pdf-section{margin:0!important;padding:0!important;display:flex!important;flex-direction:column!important;height:100%!important;flex:1!important}.youtalk-pdf-section h4{margin:0 0 .5rem!important;font-size:1rem!important;padding:0!important;flex-shrink:0!important}}@media (max-width: 680px){.youtalk-side-nav__item{flex:0 0 auto;min-width:140px}.youtalk-shell-header{flex-direction:column;align-items:flex-start}.youtalk-shell-header__title{align-items:flex-start}.youtalk-shell-main{padding-inline:.75rem}.youtalk-unit-nav{padding:1.25rem}.youtalk-unit-panel{padding:1rem}.youtalk-side-nav-mobile.show~.youtalk-shell .youtalk-hamburger-left{display:none!important}.youtalk-mobile-close-button{display:flex;align-items:center;justify-content:center;width:32px;height:32px;padding:0;background:transparent;border:none;border-radius:50%;color:#64748b;cursor:pointer;transition:all .2s ease;margin-left:auto}.youtalk-mobile-close-button:hover{background:#2b82c51f;color:#2b82c5;transform:scale(1.1)}.youtalk-side-nav__header{display:flex;justify-content:space-between;align-items:center;gap:1rem;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid rgba(148,163,184,.2)}}.auth-panel{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1rem;border-radius:1rem;border:1px solid rgba(148,163,184,.3);background:#ffffffbf;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);align-self:stretch;flex-wrap:wrap}.auth-message{color:#1f2937;font-weight:500}.auth-button{display:inline-flex;align-items:center;justify-content:center;padding:.65rem 1.2rem;border-radius:.75rem;border:none;background:#2b82c5;color:#fff;font-weight:600;cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.auth-button:hover{transform:translateY(-1px);box-shadow:0 10px 24px #2b82c526}.auth-button--secondary{background:#111827}.auth-button--secondary:hover{background:#2b82c5}.auth-user{display:flex;align-items:center;gap:.75rem;min-width:0}.auth-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;border:2px solid rgba(43,130,197,.4)}.auth-user-copy{display:flex;flex-direction:column;gap:.2rem}.auth-user-name{font-weight:600;color:#111827}.auth-status{font-size:.875rem;font-weight:500}.auth-status--ok{color:#047857}.auth-status--alert{color:#b91c1c}.auth-error{flex-basis:100%;font-size:.875rem;color:#b91c1c}.auth-alert{flex-basis:100%;background:#b91c1c1f;color:#991b1b;font-size:.95rem;font-weight:500;padding:.55rem .75rem;border-radius:.75rem}@media (max-width: 640px){.auth-panel{align-items:stretch}.auth-button,.auth-button--secondary{width:100%}}.youtalk-gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:2rem;background:linear-gradient(150deg,#ecf4fff2,#e2e8f0e6)}.youtalk-gate-card{width:min(480px,100%);padding:2.5rem;border-radius:1.5rem;background:#fffffff2;box-shadow:0 25px 50px -12px #0f172a73;text-align:center;display:flex;flex-direction:column;gap:1.5rem}.youtalk-gate-logo{width:120px;height:120px;margin:0 auto;border-radius:50%;background:linear-gradient(145deg,#2b82c526,#e4e9f5a6);display:flex;align-items:center;justify-content:center;box-shadow:inset 0 1px #ffffffa6}.youtalk-gate-logo img{width:72%;height:auto}.youtalk-gate-copy{display:flex;flex-direction:column;gap:.75rem}.youtalk-gate-card h1{margin:0;font-size:clamp(1.5rem,2.2vw,2rem);color:#0f172a}.youtalk-gate-card p{margin:0;color:#1f2937;line-height:1.6}.youtalk-gate-hint{font-size:.9375rem;color:#1e293bbf}.youtalk-gate .loading-spinner{width:40px;height:40px;margin:0 auto}@media (max-width: 640px){.youtalk-gate{padding:1.5rem}.youtalk-gate-card{padding:2rem 1.5rem}}