:root {
  color-scheme: light dark;
  --ink: #111827;
  --paper: #f9fafb;
  --ember: #ff5e3a;
  --ember-2: #ff2d87;
  --mist: #6b7280;
  --line: #e5e7eb;
  --card: #ffffff;
  --signal: #ff2d87;
  font-family: ui-sans-serif, system-ui, sans-serif;
}
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: var(--paper); color: var(--ink); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.25rem 1.5rem 0; }
.logo { height: 64px; width: auto; display: block; }
.tag { margin: 0; color: var(--mist); }
main { max-width: 40rem; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
h1 { font-size: 1.6rem; letter-spacing: -0.03em; margin: 0 0 0.4rem; }
label { display: block; margin: 0.85rem 0 0.35rem; font-size: 0.85rem; font-weight: 650; }
input, select, button { font: inherit; width: 100%; padding: 0.65rem 0.75rem; border-radius: 10px; border: 1px solid var(--line); background: var(--card); color: inherit; }
input:focus, select:focus { outline: 2px solid var(--ember-2); outline-offset: 1px; }
button { margin-top: 1rem; cursor: pointer; background: linear-gradient(135deg, var(--ember), var(--ember-2)); color: #fff; border: 0; font-weight: 700; }
progress { width: 100%; height: 0.8rem; margin-top: 1rem; accent-color: var(--ember-2); }
#log { white-space: pre-wrap; }
a { color: var(--signal); font-weight: 700; }
@media (prefers-color-scheme: dark) {
  :root { --paper: #0b0b10; --ink: #f9fafb; --card: #16161e; --line: #2c2c36; --mist: #9ca3af; }
}
@media (max-width: 640px) {
  .top { flex-direction: column; align-items: flex-start; }
}