/* 기본 구조 */
body { margin: 0; display: flex; flex-direction: column; height: 100vh; font-family: sans-serif; overflow: hidden; }
header { height: 60px; background: #333; color: white; display: flex; align-items: center; padding: 0 20px; justify-content: space-between; flex-shrink: 0; }
main { flex: 1; display: flex; overflow: hidden; background: #fff; }

/* 입력/출력 */
#markdownInput, #renderArea { flex: 1; padding: 25px; border: none; outline: none; font-size: 1.1rem; overflow-y: auto; word-break: break-all; }
#markdownInput { border-right: 1px solid #ddd; background: #f9f9f9; resize: none; }

/* 폰트 강제 적용 (상속 최우선) */
#renderArea, #renderArea * {
    font-family: var(--selected-font, inherit) !important;
    line-height: 1.6;
}

/* 광고 푸터 */
footer { 
    height: 120px; border-top: 1px solid #ddd; background: #eee; 
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}