:root { --blue: #004070; --ink: #000015; --yellow: #ffcc00; --bg: #f3f5f8; --line: #d9dee5; --muted: #4a5568; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Arial, sans-serif; }
.brand { background: linear-gradient(90deg, var(--blue), #00335a); color: #fff; padding: 16px 20px; font-weight: 700; font-size: 18px; }
main { max-width: 560px; margin: 24px auto; padding: 24px 20px; background: #fff; border: 1px solid var(--line); }
@media (max-width: 600px) { main { margin: 0; border-left: 0; border-right: 0; } }
h1 { margin: 0 0 12px; font-size: 22px; color: var(--blue); }
p { margin: 0 0 12px; }
.muted { color: var(--muted); font-size: 14px; }
button { font: inherit; font-weight: 700; cursor: pointer; border: 0; padding: 12px 20px; min-height: 44px; background: var(--yellow); color: var(--ink); }
button.secondary { background: #fff; border: 2px solid var(--blue); color: var(--blue); }
button:disabled { opacity: .6; cursor: default; }
button:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }
.secret { font: 15px/1.4 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--ink); color: #fff; padding: 14px; margin: 12px 0; white-space: pre-wrap; overflow-wrap: anywhere; user-select: all; }
.warn { border-left: 4px solid var(--yellow); background: #fff9e0; padding: 10px 12px; font-size: 14px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }