:root { font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", sans-serif; color: #17324d; background: #f5f8fb; }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; line-height: 1.7; }
.page-shell { width: min(100% - 2rem, 760px); margin: 0 auto; padding: 2rem 0; }
.eyebrow { color: #176b87; font-weight: 800; letter-spacing: .05em; }
.page-description { color: #52657d; }
.result-card { padding: 1rem; border: 1px solid #cbd8e4; border-radius: 14px; background: #fff; }
.output-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-top: 1rem; }
button { margin: .5rem .5rem 0 0; padding: .65rem .9rem; border: 0; border-radius: 9px; background: #176b87; color: #fff; font: inherit; cursor: pointer; }
button.secondary { background: #64748b; }
button:focus-visible { outline: 3px solid #f1ab2c; outline-offset: 3px; }
#status { min-height: 1.7rem; color: #17643d; font-weight: 700; }
li + li { margin-top: .35rem; }
@media (max-width: 620px) { .page-shell { padding: 1rem 0; } .output-grid { grid-template-columns: 1fr; } }