.admin-main { padding: 52px 0 70px; }
.admin-back { font-size: 13px; text-decoration-thickness: 1px; text-underline-offset: 5px; }
.admin-heading { display: flex; justify-content: space-between; gap: 36px; align-items: flex-start; }
.admin-heading h1 { font-size: clamp(46px, 5vw, 72px); max-width: 700px; }
.admin-heading em { color: #617b51; }
.admin-lead { max-width: 530px; margin-top: 24px; color: var(--muted); font-size: 17px; line-height: 1.7; }
.admin-account { display: flex; align-items: center; gap: 18px; font-size: 13px; }
.admin-message { margin-top: 24px; min-height: 24px; color: var(--forest); }
.admin-error { color: #872e22; background: #f6e8e2; border-left: 3px solid #963f30; padding: 14px 18px; margin: 16px 0; overflow-wrap: anywhere; }
.sign-in-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start; padding-top: 35px; }
.access-note { border-top: 1px solid var(--line); padding-top: 25px; max-width: 460px; }
.access-mark { font-size: 38px; color: #617b51; }
.access-note h2, .sign-in-form h2 { font: 34px/1.2 Georgia, serif; letter-spacing: -.035em; margin: 16px 0; }
.access-note p { color: var(--muted); line-height: 1.8; }
.access-note a { display: inline-block; margin-top: 25px; font-size: 13px; text-underline-offset: 5px; }
.sign-in-form { max-width: 480px; padding: 32px; border: 1px solid var(--line); border-radius: 8px; width: 100%; }
.sign-in-form label { display: block; margin: 22px 0 8px; font-weight: 600; font-size: 13px; }
.sign-in-form input { display: block; min-height: 48px; width: 100%; padding: 12px; color: var(--ink); background: #fffdf8; border: 1px solid #8d9d8e; border-radius: 4px; }
.solid-button, .danger-button { display: inline-flex; gap: 24px; align-items: center; justify-content: center; padding: 14px 24px; min-height: 48px; background: var(--forest); color: white; border: 1px solid transparent; border-radius: 5px; font-weight: 600; }
.solid-button:hover { background: #28554b; }
.sign-in-form .solid-button { width: 100%; margin-top: 26px; }
.form-help { color: var(--muted); font-size: 12px; margin-top: 18px; line-height: 1.6; }
.quiet-button { padding: 10px 16px; min-height: 44px; background: transparent; border: 1px solid #a6b3a2; border-radius: 5px; }
.quiet-button:hover { background: var(--selected); }
button:disabled { opacity: .55; cursor: not-allowed; }
.capacity { margin-top: 26px; display: flex; justify-content: space-between; align-items: center; gap: 45px; padding: 26px 0; border-block: 1px solid var(--line); }
.capacity h2, .library-toolbar h2 { margin: 0; font-size: 18px; font-weight: 600; }
.capacity p { margin-top: 8px; color: var(--muted); font-size: 14px; }
.capacity-meter { min-width: 240px; text-align: right; }
.capacity-meter strong { font-size: 18px; font-weight: 500; }
.capacity progress { display: block; width: 100%; height: 8px; margin-top: 12px; border: 0; border-radius: 4px; overflow: hidden; background: #e1e6d9; accent-color: #627b51; }
.capacity progress::-webkit-progress-bar { background: #e1e6d9; }
.capacity progress::-webkit-progress-value { background: #627b51; }
.capacity progress::-moz-progress-bar { background: #627b51; }
.library-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 35px 0 12px; }
.library-toolbar h2 span { margin-left: 10px; font-weight: 400; color: var(--muted); }
.library-toolbar > div { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.library-toolbar select { font: inherit; color: var(--ink); background: transparent; border: 1px solid #a6b3a2; border-radius: 4px; min-height: 44px; padding: 8px; max-width: 100%; }
.sort-note { font-size: 12px; color: var(--muted); margin-bottom: 18px; }
.course-library { list-style: none; margin: 0; padding: 0; }
.course-row { display: grid; grid-template-columns: 36px minmax(0, 1fr) 125px; gap: 20px; align-items: center; border-top: 1px solid var(--line); padding: 25px 0; }
.course-index { font: 18px Georgia, serif; color: #617b51; align-self: start; padding-top: 2px; }
.course-row h3 { margin: 0; font-size: 17px; font-weight: 500; line-height: 1.5; overflow-wrap: anywhere; }
.course-file { color: var(--muted); font-size: 12px; margin: 5px 0 8px; overflow-wrap: anywhere; }
.course-meta { display: flex; flex-wrap: wrap; column-gap: 18px; row-gap: 5px; font-size: 12px; color: var(--muted); }
.course-state { color: var(--forest); font-weight: 600; }
.course-actions { display: flex; flex-direction: column; align-items: stretch; gap: 10px; text-align: center; font-size: 12px; }
.course-actions a { padding: 8px 0; text-underline-offset: 4px; }
.remove-button { color: #873b2c; border-color: #bb9d91; }
.remove-button:hover { background: #f6e8e2; }
.empty-library { padding: 40px 0; border-top: 1px solid var(--line); color: var(--muted); }
.return-teach { display: flex; justify-content: space-between; max-width: 340px; padding: 17px 0; margin-top: 28px; border-bottom: 1px solid var(--forest); text-decoration: none; }
#delete-dialog { width: min(100% - 40px, 520px); padding: 30px; border: 1px solid var(--line); border-radius: 8px; background: var(--paper); color: var(--ink); }
#delete-dialog::backdrop { background: rgb(12 29 25 / .5); }
#delete-dialog h2 { font: 34px/1.2 Georgia, serif; margin: 18px 0; }
#delete-course-name { font-weight: 600; overflow-wrap: anywhere; margin-bottom: 16px; }
#delete-description { font-size: 14px; color: var(--muted); line-height: 1.7; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 12px; margin-top: 28px; }
.danger-button { background: #873b2c; }
.danger-button:hover { background: #713022; }
@media (max-width: 850px) {
  .sign-in-layout { gap: 35px; }
  .sign-in-form { padding: 24px; }
  .admin-account { flex-direction: column; align-items: flex-end; gap: 8px; }
}
@media (max-width: 620px) {
  .admin-main { padding-top: 32px; }
  .admin-heading { display: block; }
  .admin-heading h1 { margin-top: 20px; font-size: 49px; }
  .admin-lead { font-size: 15px; }
  .admin-account { flex-direction: row; align-items: center; margin-top: 24px; }
  .sign-in-layout { display: flex; flex-direction: column; gap: 32px; padding-top: 12px; }
  .sign-in-form { order: -1; max-width: none; }
  .access-note { padding-top: 10px; }
  .access-note h2 { font-size: 28px; }
  .capacity { flex-direction: column; align-items: stretch; gap: 20px; }
  .capacity-meter { min-width: 0; text-align: left; }
  .library-toolbar { flex-direction: column; align-items: stretch; gap: 16px; }
  .library-toolbar > div { gap: 8px; }
  .library-toolbar select { min-width: 0; flex: 1; }
  .course-row { grid-template-columns: 22px minmax(0, 1fr); gap: 12px; }
  .course-actions { grid-column: 2; flex-direction: row; align-items: center; gap: 20px; }
  .course-actions .quiet-button { min-width: 110px; }
  .course-meta { column-gap: 14px; }
  .dialog-actions { flex-direction: column-reverse; }
  .dialog-actions button { width: 100%; }
}