:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --ink: #1f2430;
  --muted: #8a92a6;
  --brand: #e8567a;
  --brand-ink: #fff;
  --line: #e6e8ef;
  --ok: #2f9e6f;
  --warn: #d98a16;
  --danger: #d64545;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.topbar {
  display: flex; align-items: center; gap: .5rem 1rem;
  flex-wrap: wrap;                 /* wrap onto new lines on narrow screens */
  padding: .8rem 1.2rem;
  background: var(--card);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; color: var(--brand); text-decoration: none; font-size: 1.2rem; white-space: nowrap; }
.topbar nav {
  display: flex; align-items: center; gap: .5rem 1rem;
  flex-wrap: wrap;                 /* nav items wrap instead of squishing */
  margin-left: auto;
}
.topbar nav a, .topbar nav button { white-space: nowrap; }  /* never break a word like 신청내역 */
.topbar nav a { color: var(--ink); text-decoration: none; font-weight: 600; }
.topbar nav a:hover { color: var(--brand); }
.who { color: var(--muted); font-size: .85rem; white-space: nowrap; }

/* Narrow phones (e.g. Galaxy Flip folded ~340px): compact header. */
@media (max-width: 480px) {
  .topbar { padding: .6rem .8rem; gap: .4rem .7rem; }
  .topbar nav { gap: .4rem .7rem; width: 100%; }   /* nav drops to its own line */
  .topbar nav a, .topbar nav button.link { font-size: .9rem; }
  .brand { font-size: 1.1rem; }
  .who { width: 100%; order: 9; font-size: .8rem; }  /* push email to last line */
  .container { margin: 1rem auto; }
  .card { padding: 1rem; }
  h1 { font-size: 1.3rem; }
  /* Forms/rows stack vertically so inputs don't get crushed. */
  .row { flex-direction: column; align-items: stretch; }
  .row input, .row select, .row label { width: 100%; flex: 1 1 auto; }
  table { font-size: .85rem; }
  th, td { padding: .45rem .4rem; }
}

.container { max-width: 920px; margin: 1.5rem auto; padding: 0 1rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
  margin-bottom: 1.2rem;
}
.auth-card { max-width: 380px; margin: 3rem auto; }

h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 .8rem; }
h3 { font-size: .95rem; margin: 1.2rem 0 .5rem; color: var(--muted); }

label { display: block; margin-bottom: .8rem; font-size: .9rem; font-weight: 600; }
input, select {
  display: block; width: 100%; margin-top: .3rem;
  padding: .55rem .7rem; border: 1px solid var(--line);
  border-radius: 8px; font-size: .95rem; background: #fff;
}
.row { display: flex; gap: .6rem; align-items: flex-end; flex-wrap: wrap; }
.row input, .row select { width: auto; flex: 1 1 160px; margin-top: 0; }

button {
  padding: .55rem 1rem; border: 0; border-radius: 8px;
  background: var(--brand); color: var(--brand-ink);
  font-weight: 700; cursor: pointer; font-size: .9rem;
}
button:hover { filter: brightness(.95); }
button.danger { background: var(--danger); }
button.link { background: none; color: var(--brand); padding: 0; font-weight: 600; }
button.link.danger { color: var(--danger); }

/* Small secondary action link/button (e.g. "학생관리"). */
.btn-sm {
  display: inline-block;
  padding: .4rem .8rem;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--brand);
  color: var(--brand);
  font-size: .82rem;
  font-weight: 700;
  text-decoration: none;
  line-height: 1.2;
  white-space: nowrap;
}
.btn-sm:hover { background: var(--brand); color: #fff; }
form.inline { display: inline; }
/* Lets a <form> wrap several <td> cells inside one table row. */
form.contents { display: contents; }
table input[type="text"], table input[type="number"] { font-size: .88rem; }

table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: .55rem .6rem; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
td a { color: var(--brand); text-decoration: none; font-weight: 600; }
.actions { display: flex; gap: .5rem; align-items: center; flex-wrap: wrap; }

.muted { color: var(--muted); font-size: .9rem; }
.error { color: var(--danger); background: #fdeaea; padding: .6rem .8rem; border-radius: 8px; }
.success { color: var(--ok); background: #e8f6ef; padding: .6rem .8rem; border-radius: 8px; }

.badge {
  display: inline-block; padding: .15rem .5rem; border-radius: 999px;
  font-size: .75rem; font-weight: 700; background: var(--line); color: var(--ink);
}
.status-pending { background: #fdf0d8; color: var(--warn); }
.status-approved { background: #e8f6ef; color: var(--ok); }
.status-rejected { background: #fdeaea; color: var(--danger); }

.footer { text-align: center; color: var(--muted); font-size: .8rem; padding: 2rem 0; }