* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 17px;
}

nav {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  gap: .75rem;
  align-items: center;
  padding: .75rem 1rem;
  background: #111827;
  color: #fff;
  box-shadow: 0 1px 6px #0002;
}
nav a, nav span {
  color: #fff;
  text-decoration: none;
  padding: .45rem .6rem;
  border-radius: .5rem;
}
nav a:hover { background: #ffffff22; }

nav button[data-theme-toggle] {
  background: transparent;
  color: #fff;
  border: 1px solid #ffffff44;
  border-radius: .5rem;
  padding: .35rem .55rem;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  min-width: 2.2rem;
}
nav button[data-theme-toggle]:hover,
nav button[data-theme-toggle]:focus { background: #ffffff22; }

main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 4px #0000000d;
}
.login-card { max-width: 420px; margin: 10vh auto; }

.grid { display: grid; gap: 1rem; }
.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.stack { display: grid; gap: .8rem; }
.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .8rem;
  align-items: end;
}
.wide { grid-column: 1 / -1; }

label { display: grid; gap: .35rem; font-weight: 650; }

input, select, button {
  font: inherit;
  border: 1px solid var(--line);
  border-radius: .7rem;
  padding: .65rem;
  background: var(--input-bg);
  color: var(--input-text);
}
button { cursor: pointer; font-weight: 750; }
button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}
.large { width: 100%; font-size: 1.15rem; padding: 1rem; margin-top: .6rem; }

table { width: 100%; border-collapse: collapse; overflow: auto; }
th, td {
  padding: .7rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th { color: var(--text); font-size: 1rem; font-weight: 700; }

.num { text-align: right; white-space: nowrap; }

.action-cell {
  display: flex;
  gap: .5rem;
  align-items: center;
  white-space: nowrap;
}

.alert { padding: .8rem 1rem; border-radius: .8rem; font-weight: 700; }
.error { background: var(--alert-error-bg); color: var(--danger); }
.ok { background: var(--alert-ok-bg); color: var(--ok); }

.hint, small { color: var(--muted); }

@media (max-width: 760px) {
  .two, .form-grid { grid-template-columns: 1fr; }
  main { padding: .6rem; }
  nav { overflow: auto; }
  table { display: block; overflow-x: auto; white-space: nowrap; }
  .card { border-radius: .8rem; }
}