:root {
  color-scheme: light dark;
  --accent: #12a150; --ink: #1f2328; --muted: #6b7280; --line: #e5e7eb; --card: #ffffff; --bg: #eef0f3;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #e8eaed; --muted: #9aa0a6; --line: #3a3f47; --card: #23272e; --bg: #17191d; }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: grid; place-items: center; padding: 16px; background: var(--bg); color: var(--ink);
  font-family: "Pretendard Variable", Pretendard, system-ui, -apple-system, "Segoe UI", sans-serif;
}
.card {
  width: min(360px, 100%); display: grid; gap: 12px; padding: 24px; border-radius: 16px;
  background: var(--card); box-shadow: 0 2px 6px rgba(0, 0, 0, .08), 0 12px 40px rgba(0, 0, 0, .12);
}
.mark { display: block; }
h1 { margin: 0; font-size: 22px; letter-spacing: -.02em; display: flex; align-items: center; gap: 8px; }
.tag {
  font-size: 12px; font-weight: 700; letter-spacing: 0; padding: 3px 8px; border-radius: 999px;
  color: #b45309; background: rgba(245, 158, 11, .16);
}
@media (prefers-color-scheme: dark) { .tag { color: #fbbf24; background: rgba(245, 158, 11, .18); } }
p { margin: 0; font-size: 13px; line-height: 1.55; color: var(--muted); word-break: keep-all; }
form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; }
input {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; font: inherit; font-size: 15px;
  font-weight: 400; background: var(--card); color: var(--ink);
}
input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.error { color: #c62828; }
@media (prefers-color-scheme: dark) { .error { color: #ff8a80; } }
button {
  border: 0; border-radius: 10px; padding: 12px; margin-top: 2px; background: var(--accent); color: #fff;
  font: inherit; font-size: 15px; font-weight: 700; cursor: pointer;
}
button:hover { background: #0f8a44; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.back { justify-self: center; font-size: 13px; color: var(--muted); text-decoration: none; }
.back:hover { color: var(--ink); text-decoration: underline; }