@import "https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap";
:root{--text-color:#183a3a}*{box-sizing:border-box}body{color:var(--text-color);background:#fff;margin:0;font-family:Noto Sans KR,sans-serif}a{color:var(--text-color);text-decoration:none}.navbar{background:#fff;border-bottom:1px solid #e8eeee;justify-content:space-between;align-items:center;height:72px;padding:0 40px;display:flex}.logo{width:auto;height:48px;display:block}.nav-links{align-items:center;gap:32px;font-weight:500;display:flex}.nav-links a,.dropdown-button{font:inherit;color:var(--text-color);cursor:pointer;background:0 0;border:none}.dropdown{position:relative}.dropdown-menu{background:#fff;border:1px solid #e8eeee;border-radius:8px;min-width:160px;padding:10px 0;display:none;position:absolute;top:32px;left:0;box-shadow:0 8px 20px #0000000f}.dropdown-menu a{white-space:nowrap;padding:10px 16px;display:block}.dropdown:hover .dropdown-menu{display:block}.lesson-page{max-width:900px;margin:64px auto;padding:0 24px}.lesson-page h1{margin-bottom:24px;font-size:2.25rem}.lesson-page p{font-size:1.25rem;line-height:1.8}.reading-passage{white-space:pre-line}.video-container{justify-content:center;width:100%;margin-bottom:40px;display:flex}.lesson-video-container{width:100%;max-width:900px;margin:0 auto 40px}.lesson-video-frame{border:none;width:100%;height:620px;display:block}.video-wrapper iframe{border:none;width:100%;height:600px;display:block}.mcq-section{margin-top:48px}.mcq-section h2{margin-bottom:24px;font-size:1.75rem}.mcq-card{background:#fff;border:1px solid #e8eeee;border-radius:16px;margin-bottom:24px;padding:24px}.mcq-card h3{margin-top:0;margin-bottom:20px;font-size:1.15rem}.mcq-option{cursor:pointer;align-items:flex-start;gap:12px;margin:14px 0;display:flex}.mcq-option span{display:block}.mcq-option input{cursor:pointer}.feedback-correct{color:#1f7a4d;margin-top:16px;font-weight:700}.feedback-wrong{color:#b23b3b;margin-top:16px;font-weight:700}.vocab-section{margin-top:56px}.vocab-section h2{margin-bottom:24px;font-size:1.75rem}.vocab-table{border-collapse:collapse;background:#fff;width:100%}.vocab-table td{border:none;padding:2px 0;font-size:1.05rem;line-height:1.3}.korean-column{width:35%;padding-right:20px;font-weight:700}.fillblank-section{margin-top:56px}.fillblank-section h2{margin-bottom:24px;font-size:1.75rem}.fillblank-card{margin-bottom:24px}.fillblank-sentence{font-size:1.1rem;line-height:1.8}.blank-select{color:#183a3a;background:#fff;border:1px solid #d8e2e2;border-radius:8px;margin:0 6px;padding:4px 8px;font-family:Noto Sans KR,sans-serif}.review-toggle{cursor:pointer;color:#183a3a;text-align:left;background:0 0;border:none;justify-content:space-between;align-items:center;width:100%;margin-bottom:12px;padding:0;font-family:Noto Sans KR,sans-serif;font-size:1.75rem;font-weight:700;display:flex}.chevron{font-size:1.2rem}.review-description{color:#5c7272;margin-top:0;margin-bottom:24px;font-size:1rem;line-height:1}.grammar-section{margin-top:56px}.grammar-section h2{margin-bottom:24px;font-size:1.75rem}.grammar-subheading{margin-bottom:16px;font-size:1.3rem}.grammar-card{margin-bottom:32px;line-height:1.7}.grammar-title{font-size:1.1rem}.grammar-card ul{margin-top:8px}.english-toggle{cursor:pointer;color:#183a3a;background:0 0;border:none;align-items:center;gap:8px;margin-top:12px;padding:0;font-family:Noto Sans KR,sans-serif;font-size:1.1rem;font-weight:700;display:flex}.english-grammar{margin-top:12px}.practice-section{margin-top:56px}.practice-section h2{margin-bottom:16px;font-size:1.75rem}.practice-section p{margin-bottom:20px;font-size:1.05rem;line-height:1.6}.practice-link{color:#fff;background:#183a3a;border-radius:999px;padding:10px 18px;font-weight:700;text-decoration:none;display:inline-block}.video-wrapper{aspect-ratio:16/9;background:#fff;border-radius:16px;width:100%;max-width:960px;margin:0 auto 40px;overflow:hidden}.video-wrapper iframe{border:none;width:100%;height:100%}.about-page{max-width:900px;margin:64px auto;padding:0 24px;line-height:1.8}.about-image{max-width:100%;height:auto;margin:24px 0}.nav-item{position:relative}.nav-item:hover .dropdown-menu{display:block}.dropdown-menu{z-index:1000;background:#fff;min-width:180px;margin-top:0;padding:8px 0;display:none;position:absolute;top:100%;left:0;box-shadow:0 4px 12px #0000001f}.dropdown-menu a{color:#183a3a;padding:10px 16px;text-decoration:none;display:block}.dropdown-menu a:hover{background:#f7f3ea}.vocab-list-page{max-width:900px;margin:0 auto;padding:0 32px}.grammar-list-page{max-width:900px;margin:64px auto;padding:0 24px}.grammar-list-table{border-collapse:collapse;width:100%;margin-top:32px}.grammar-list-table th,.grammar-list-table td{text-align:left;padding:8px 12px}.grammar-list-table th{font-weight:700}.back-to-lesson{margin-bottom:24px}.back-to-lesson a{color:#183a3a;font-weight:600;text-decoration:none}.back-to-lesson a:hover{text-decoration:underline}