@import "https://fonts.googleapis.com/css2?family=Pretendard:wght@300;400;500;600;700&display=swap";:root{--color-primary:#0f172a;--color-secondary:#059669;--color-secondary-hover:#047857;--color-background:#f8fafc;--color-surface:#fff;--color-text:#1e293b;--color-text-muted:#64748b;--color-border:#e2e8f0;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -1px #0000000f;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -2px #0000000d;--radius-md:.5rem;--radius-lg:1rem;--radius-xl:1.5rem}*{box-sizing:border-box;margin:0;padding:0}html,body{background-color:var(--color-background);width:100%;height:100%;color:var(--color-text);font-family:Pretendard,sans-serif;overflow-x:hidden}#root{flex-direction:column;width:100%;height:100%;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:.5s ease-out forwards fadeIn}.glass-panel{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);box-shadow:var(--shadow-lg);background:#ffffffe6;border:1px solid #fff3}.btn-primary{background-color:var(--color-secondary);color:#fff;border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;gap:.5rem;padding:.75rem 1.5rem;font-weight:600;transition:all .2s;display:inline-flex}.btn-primary:hover{background-color:var(--color-secondary-hover);box-shadow:var(--shadow-md);transform:translateY(-2px)}.btn-outline{color:var(--color-primary);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;background-color:#0000;padding:.75rem 1.5rem;font-weight:500;transition:all .2s}.btn-outline:hover{border-color:var(--color-primary);background-color:var(--color-background)}.fullscreen-container{flex-direction:column;min-height:100vh;display:flex}.navbar{background-color:var(--color-surface);border-bottom:1px solid var(--color-border);z-index:100;justify-content:space-between;align-items:center;height:70px;padding:0 2rem;display:flex;position:sticky;top:0}.navbar-logo{object-fit:contain;height:40px}.nav-link{color:var(--color-text);font-size:1rem;font-weight:600;text-decoration:none;transition:color .2s}.nav-link:hover{color:var(--color-secondary)}.dashboard-grid{grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:2rem;max-width:1200px;margin:0 auto;padding:2rem;display:grid}.course-card{background-color:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);cursor:pointer;flex-direction:column;transition:transform .3s,box-shadow .3s;display:flex;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-5px)}.course-thumbnail{background-color:var(--color-primary);color:#fff;background-position:50%;background-size:cover;justify-content:center;align-items:center;height:200px;font-size:1.5rem;font-weight:700;display:flex}.course-content{flex-direction:column;flex:1;padding:1.5rem;display:flex}.progress-bar-container{background-color:var(--color-border);border-radius:4px;height:8px;margin-top:auto;overflow:hidden}.progress-bar-fill{background-color:var(--color-secondary);border-radius:4px;height:100%;transition:width .5s ease-out}.course-detail-layout{flex:1;height:calc(100vh - 70px);display:flex;overflow:hidden}.sidebar{background-color:var(--color-surface);border-right:1px solid var(--color-border);flex-direction:column;width:300px;display:flex;overflow-y:auto}.step-item{border-bottom:1px solid var(--color-border);cursor:pointer;align-items:center;gap:1rem;padding:1rem 1.5rem;transition:background-color .2s;display:flex}.step-item:hover{background-color:var(--color-background)}.step-item.active{border-left:4px solid var(--color-secondary);background-color:#ecfdf5}.step-item.completed .step-circle{background-color:var(--color-secondary);color:#fff;border-color:var(--color-secondary)}.step-circle{border:2px solid var(--color-border);width:28px;height:28px;color:var(--color-text-muted);border-radius:50%;justify-content:center;align-items:center;font-size:.8rem;font-weight:700;display:flex}.main-content{background-color:var(--color-background);flex-direction:column;flex:1;display:flex;position:relative;overflow-y:auto}.video-wrapper{background-color:var(--color-background);flex-direction:column;justify-content:center;align-items:center;width:100%;padding:2rem;display:flex}.media-container{aspect-ratio:4/3;background-color:var(--color-background);border-radius:var(--radius-lg);width:100%;max-width:760px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.media-container video,.media-container img{object-fit:contain;width:100%;height:100%;position:absolute;top:0;left:0}.description-box{background-color:var(--color-surface);border-radius:var(--radius-lg);width:100%;max-width:1200px;box-shadow:var(--shadow-sm);border:1px solid var(--color-border);margin:2rem auto;padding:2rem}.description-box h2{color:var(--color-primary);margin-bottom:1rem;font-size:1.5rem}.description-box p{color:var(--color-text);white-space:pre-wrap;font-size:1.1rem;line-height:1.6}.navigation-bar{justify-content:space-between;align-items:center;width:100%;max-width:960px;margin:1rem auto 0;display:flex}.quiz-option{border-radius:var(--radius-lg);cursor:pointer;text-align:left;background-color:#f3f4f6;border:2px solid #0000;align-items:center;gap:1rem;width:100%;padding:1.5rem;font-size:1.1rem;transition:all .2s;display:flex}.quiz-option:hover{background-color:#e5e7eb}.quiz-option.selected{border-color:var(--color-secondary);background-color:#ecfdf5;box-shadow:0 0 0 4px #0596691a}.quiz-option-letter{color:var(--color-primary);font-size:1.2rem;font-weight:700}.quiz-option-text{color:var(--color-text);line-height:1.5}.pdf-doc,.pdf-page{justify-content:center;align-items:center;width:100%;height:100%;display:flex}.pdf-page canvas{object-fit:contain;width:100%!important;height:100%!important}@media (width<=768px){.navbar{height:60px;padding:0 1rem}.navbar-logo{height:30px}.navbar h1{font-size:1rem!important}.mobile-hidden{display:none!important}.fullscreen-container{min-height:100vh}.dashboard-grid{grid-template-columns:1fr;gap:1rem;padding:1rem}.course-detail-layout{flex-direction:column;height:auto;min-height:calc(100vh - 60px);overflow:visible}.sidebar{border-right:none;border-bottom:1px solid var(--color-border);width:100%;max-height:35vh}.main-content{overflow:visible}.video-wrapper{padding:1rem}.description-box{margin:1rem auto;padding:1.5rem}.navigation-bar{flex-direction:column;gap:.5rem}.navigation-bar button{width:100%}.hero-section{padding:3rem 1rem!important}.hero-title{font-size:2rem!important}.hero-subtitle{font-size:1.1rem!important}.profile-grid{grid-template-columns:1fr!important;gap:1rem!important}.cert-grid{flex-direction:column!important}.lecture-header{flex-direction:column;gap:.5rem;padding-top:1rem}.lecture-header-title{font-size:1.2rem!important}.lecture-tabs{flex-direction:column;gap:.5rem!important}.lecture-tabs button{border-radius:var(--radius-md)!important}}@media (width<=480px){.quiz-option{gap:.75rem;padding:1rem;font-size:1rem}.quiz-option-letter{font-size:1.1rem}.dashboard-grid{padding:.5rem}.course-card{border-radius:var(--radius-md)}h2{font-size:1.5rem!important}.result-summary{padding:2rem 1rem!important}.result-summary h2{font-size:1.5rem!important}.result-summary span{font-size:1rem!important}}