:root{--brand-color: #2f6fdb;--brand-text-color: #ffffff;--layout-max-width: 1080px;--text-color: #1f2328;--muted-color: #8b949e;--page-background: #f6f8fa}*{box-sizing:border-box}body{margin:0;font-family:Pretendard,Apple SD Gothic Neo,system-ui,-apple-system,sans-serif;color:var(--text-color);background:var(--page-background)}.layout{min-height:100vh;display:flex;flex-direction:column}.layout-header{display:flex;align-items:center;gap:12px;padding:10px 20px;background:var(--brand-color);color:var(--brand-text-color)}.layout-logo{height:28px;width:auto}.layout-name{font-size:18px;font-weight:700}.layout-main{flex:1;width:100%;max-width:var(--layout-max-width);margin:0 auto;padding:20px}.layout-footer{padding:8px 20px;text-align:center;font-size:12px;color:var(--muted-color)}.board{position:relative;width:100%;aspect-ratio:4 / 3;color:#1f6feb}.board-grid{background-image:repeating-linear-gradient(to right,rgba(0,0,0,.08) 0 1px,transparent 1px 40px),repeating-linear-gradient(to bottom,rgba(0,0,0,.08) 0 1px,transparent 1px 40px)}.board-ink{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;pointer-events:none}.watermark{position:absolute;top:0;right:0;bottom:0;left:0;overflow:hidden;pointer-events:none;z-index:1}.watermark span{position:absolute;color:#00000017;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;white-space:nowrap;transform:rotate(-30deg);-webkit-user-select:none;user-select:none}