@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+KR:wght@400;600&family=STIX+Two+Text:ital,wght@0,400;0,600;1,400&display=swap');
:root{color-scheme:light;--font-size-base:16px;color:#171717;background:#fff;font-family:'Noto Serif KR','STIX Two Text','AppleMyungjo',serif}
*{box-sizing:border-box}
body{margin:0;background:#fff}
main{max-width:850px;margin:0 auto;padding:56px 44px 72px}
h1{margin:0 0 20px;font-size:28px;line-height:1.55;letter-spacing:-.04em;font-weight:600}
h2{margin:46px 0 16px;font-size:21px;line-height:1.6;font-weight:600;letter-spacing:-.025em}
h3{margin:30px 0 12px;font-size:17px;line-height:1.7;font-weight:600}
h1,h2,h3{word-break:keep-all;overflow-wrap:anywhere}
p,li{font-size:16px;line-height:2;word-break:keep-all;overflow-wrap:anywhere}
p{margin:14px 0}
strong{font-weight:600}
ul,ol{padding-left:1.6em}
li{margin:8px 0}
details{margin:20px 0;padding:14px 0;border-top:1px solid #dedede;border-bottom:1px solid #dedede}
summary{font-size:15px;line-height:1.8;cursor:pointer}
details p,details li{font-size:15px}
.katex-display{margin:22px 0;padding:6px 0;overflow-x:auto;overflow-y:hidden;text-align:center}
.katex{font-size:1.1em}
.trapezoid-diagram{max-width:540px;margin:28px auto 30px}
.trapezoid-diagram .trapezoid-plot{display:block;width:100%;background:#fff;color:#000;overflow:visible}
.trapezoid-diagram .trapezoid-plot .stroke{fill:none;stroke:#000;stroke-width:1.3}
.trapezoid-diagram .trapezoid-plot .axis{fill:none;stroke:#000;stroke-width:.8}
.trapezoid-diagram .trapezoid-plot .guide{fill:none;stroke:#b8b8b8;stroke-width:1;stroke-dasharray:4 4}
.trapezoid-diagram .trapezoid-plot .ghost{fill:none;stroke:#b8b8b8;stroke-width:1}
.trapezoid-diagram .trapezoid-plot .dimension{fill:none;stroke:#b8b8b8;stroke-width:.8;stroke-linecap:round}
.trapezoid-diagram .trapezoid-plot .dot{fill:#000}
.trapezoid-diagram .trapezoid-plot .math{display:inline-block;white-space:nowrap;color:#000;font-size:16px}
.trapezoid-diagram [data-scale-value]{display:inline-block;min-width:2em}
.trapezoid-diagram [data-scaling]{display:flex;align-items:center;gap:12px;flex-wrap:wrap;padding:8px 0 4px}
.trapezoid-diagram [data-scaling] label{font-size:15px;white-space:nowrap}
.trapezoid-diagram input[type=range]{width:100%;height:24px;margin:6px 0;accent-color:#000;cursor:pointer}
[hidden]{display:none!important}
.load-error{font-size:14px;line-height:1.8;color:#333}
@media(max-width:600px){main{padding:32px 20px 48px}h1{font-size:24px}h2{font-size:19px;margin-top:36px}p,li{font-size:15px;line-height:1.95}.katex-display{font-size:14px}.trapezoid-diagram{margin:22px auto}}
@media print{main{max-width:none;padding:0}h2,h3{break-after:avoid}.trapezoid-diagram{break-inside:avoid}details{border:0}summary{display:none}.trapezoid-diagram [data-scaling]{display:none}}