:root {
  --ink: #172033;
  --muted: #526074;
  --paper: #eef3f7;
  --card: #ffffff;
  --line: #d5e0ea;
  --accent: #1d4e89;
  --accent-ink: #14365f;
  --warn: #8a3b12;
  --radius: 16px;
  --max: 46rem;
  font-family: "Pretendard", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 0;
}

.logo {
  color: var(--accent-ink);
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
  font-size: 1.2rem;
}

.nav { display: flex; flex-wrap: wrap; gap: 0.8rem; }

.nav a {
  color: var(--muted);
  text-decoration: none;
}

.nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

main { padding: 1.4rem 0 2.5rem; }

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.7rem;
  letter-spacing: -0.04em;
}

.lede { margin: 0 0 1.1rem; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1rem 1.1rem;
  margin-bottom: 1rem;
}

.card h2 { margin: 0 0 0.7rem; font-size: 1.05rem; }

.modes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.9rem;
}

.modes label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  color: var(--ink);
}

.fields {
  display: grid;
  gap: 0.75rem;
}

label.field {
  display: grid;
  gap: 0.25rem;
  color: var(--muted);
  font-size: 0.88rem;
}

input[type="date"],
input[type="number"] {
  width: 100%;
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.55rem 0.65rem;
}

.toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }

button {
  font: inherit;
  cursor: pointer;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
  padding: 0.45rem 0.75rem;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.result-total {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--accent-ink);
  margin: 0;
}

.sub { color: var(--muted); margin: 0.35rem 0 0.8rem; }

.card h3 {
  margin: 0.2rem 0 0.45rem;
  font-size: 1rem;
}

.holiday-list {
  margin: 0;
  padding-left: 1.1rem;
}

.holiday-list li { margin: 0.2rem 0; }

.hint { color: var(--muted); font-size: 0.88rem; margin: 0.7rem 0 0; }

.status { color: var(--accent-ink); font-size: 0.88rem; margin: 0.6rem 0 0; }

.assumptions { color: var(--muted); font-size: 0.95rem; }
.assumptions a { color: var(--accent); }

.site-footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  padding: 1.2rem 0 2rem;
}

.footer-inner a { color: var(--accent); }

.prose h2 { margin-top: 1.4rem; font-size: 1.12rem; }
.prose ul { padding-left: 1.15rem; }

@media (min-width: 768px) {
  .fields.two { grid-template-columns: 1fr 1fr; }
}