:root {
  color-scheme: light;
  --border: #d8dee8;
  --muted: #5d6978;
  --accent: #165d9f;
  --bg: #f6f8fb;
  --text: #17202a;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1;
}
.brand { font-weight: 700; color: var(--text); text-decoration: none; }
main { max-width: 1160px; margin: 0 auto; padding: 24px; }
h1 { margin: 0 0 18px; font-size: 28px; }
h2 { margin: 28px 0 12px; font-size: 20px; }
a { color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.panel {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 18px;
  margin-bottom: 18px;
}
.narrow { max-width: 520px; margin: 32px auto; }
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tabs a {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  padding: 8px 10px;
  text-decoration: none;
}
form { display: grid; gap: 12px; }
label { display: grid; gap: 5px; }
label span { color: var(--muted); font-size: 13px; }
input, select, textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  padding: 9px 10px;
  background: #fff;
}
textarea { min-height: 120px; resize: vertical; }
button, .button {
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  cursor: pointer;
  font: inherit;
  padding: 8px 11px;
  text-decoration: none;
}
button:disabled {
  color: #8a95a3;
  background: #eef1f5;
  cursor: not-allowed;
}
.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.danger { color: #a51e22; }
.inline { display: inline-grid; grid-auto-flow: column; gap: 8px; align-items: center; }
.export-form { margin: 0 0 14px; }
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; min-width: 720px; }
th, td { border-bottom: 1px solid var(--border); padding: 10px; text-align: left; vertical-align: top; }
th { background: #f0f3f7; font-size: 13px; color: var(--muted); }
th[tabindex] { cursor: pointer; user-select: none; }
th[tabindex]::after { content: " ⇅"; font-size: 11px; color: #8a95a3; }
th[aria-sort="ascending"]::after { content: " ▲"; font-size: 11px; }
th[aria-sort="descending"]::after { content: " ▼"; font-size: 11px; }
tr:last-child td { border-bottom: 0; }
.flash { border-radius: 8px; padding: 10px 12px; margin-bottom: 14px; background: #e9f6ee; border: 1px solid #b8dec5; }
.flash.error { background: #fff0f0; border-color: #e5b9b9; }
.muted { color: var(--muted); }
.warning { color: #9a5a00; font-weight: 700; }
.collapsible summary {
  cursor: pointer;
  font-weight: 700;
}
.collapsible form,
.collapsible p {
  margin-top: 12px;
}
.stacked-actions {
  display: grid;
  gap: 10px;
}
.stacked-actions .button {
  display: block;
  text-align: center;
}
.system-link {
  margin-top: 22px;
  font-size: 12px;
  text-align: center;
}
.top-login {
  min-height: 420px;
  display: flex;
  flex-direction: column;
}
.top-login h1 {
  margin-bottom: 36px;
}
.top-login .button {
  display: block;
  text-align: center;
}
.top-system-link {
  margin-top: auto;
  padding-top: 72px;
}
.field-note { margin: -6px 0 0; font-size: 12px; }
.file-links { display: inline-block; line-height: 1.7; }
.file-meta { font-size: 12px; }
.reason-text { margin-bottom: 6px; max-width: 46em; }
.current-file {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px 12px;
  background: #fbfcfe;
}

/* 志望理由書 PDF の画面内オーバレイ表示 */
body.pdf-overlay-open { overflow: hidden; }
.pdf-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(23, 32, 42, 0.62);
}
.pdf-overlay[hidden] { display: none; }
.pdf-overlay-panel {
  display: flex;
  flex-direction: column;
  width: min(1000px, 100%);
  height: min(90vh, 100%);
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(23, 32, 42, 0.32);
}
.pdf-overlay-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: #f0f3f7;
}
.pdf-overlay-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pdf-overlay-actions { display: flex; gap: 8px; flex-shrink: 0; }
.pdf-overlay-frame { flex: 1; width: 100%; border: 0; }

@media (max-width: 720px) {
  main { padding: 14px; }
  header { padding: 10px 14px; }
  .top-login { min-height: 340px; }
  .pdf-overlay { padding: 0; }
  .pdf-overlay-panel { height: 100%; border-radius: 0; }
}