:root{--font-sans:"BIZ UDPGothic", "Segoe UI", sans-serif;--font-mono:"IBM Plex Mono", "SFMono-Regular", ui-monospace, monospace;--ink-900:#1a202c;--ink-500:#718096;--bg-app:#f8fafc}*{box-sizing:border-box}body{font-family:var(--font-sans);background:var(--bg-app);color:var(--ink-900);min-height:100vh;margin:0}#app{min-height:100vh}.section-card{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid #ffffff80;background:#fffc!important;border-radius:16px!important;box-shadow:0 10px 15px -3px #0000000d,0 4px 6px -2px #00000006!important}.mono-textarea textarea{font-family:var(--font-mono)!important;font-size:.875rem!important;line-height:1.5!important}.section-title{color:var(--ink-900);letter-spacing:-.025em;font-size:1.25rem;font-weight:700}.page-title{color:var(--ink-900);letter-spacing:-.025em;font-size:1.875rem;font-weight:800}.page-subtitle{color:var(--ink-500);margin-top:.5rem;font-size:1rem;font-weight:400}.subtle{color:var(--ink-500);font-size:.875rem}