:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #637486;
  --line: #d7e2e8;
  --panel: #ffffff;
  --soft: #f7faf9;
  --green: #188064;
  --green-dark: #125a46;
  --navy: #22384a;
  --blue: #2f6f9f;
  --red: #ad3d3d;
  --amber: #b96b16;
  --shadow: 0 16px 40px rgba(25, 48, 60, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Noto Sans KR", Arial, sans-serif;
  color: var(--ink);
  background: #eef5f2;
}

button, input, select, textarea {
  min-height: 44px;
  font: inherit;
}

.admin-shell {
  width: min(1440px, calc(100% - 36px));
  margin: 0 auto;
  padding: 24px 0 36px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(520px, 0.9fr);
  gap: 20px;
  align-items: stretch;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

h1, h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  color: var(--ink);
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.08;
}

h2 {
  color: var(--ink);
  font-size: 21px;
  line-height: 1.25;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.metric-row div {
  min-height: 84px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}

.metric-row strong {
  display: block;
  color: var(--green-dark);
  font-size: 30px;
  line-height: 1;
}

.metric-row span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.layout {
  display: grid;
  grid-template-columns: minmax(330px, 380px) minmax(0, 1fr);
  gap: 18px;
  margin-top: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow);
}

.config-panel, .request-panel { padding: 22px; }
.section-heading { margin-bottom: 16px; }

.config-form {
  display: grid;
  gap: 13px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

label {
  display: grid;
  gap: 7px;
}

label span {
  color: #344653;
  font-size: 13px;
  font-weight: 900;
}

input, select, textarea {
  width: 100%;
  border: 1px solid #c7d4db;
  border-radius: 8px;
  padding: 11px 12px;
  color: var(--ink);
  background: white;
}

textarea {
  resize: vertical;
  line-height: 1.5;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--green);
  outline: 3px solid rgba(24, 128, 100, 0.14);
}

button {
  border: 0;
  border-radius: 8px;
  padding: 11px 14px;
  color: white;
  background: var(--green);
  font-weight: 900;
  cursor: pointer;
  white-space: nowrap;
}

button:hover { background: var(--green-dark); }

.secondary-button {
  color: var(--green-dark);
  background: #edf5f2;
}

.secondary-button:hover {
  color: white;
  background: var(--green-dark);
}

.hidden { display: none; }

.config-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.holiday-list {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.holiday-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}

.holiday-item strong {
  display: block;
  font-size: 16px;
  line-height: 1.35;
}

.holiday-item span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.holiday-item button {
  min-height: 40px;
  padding: 8px 12px;
  color: var(--red);
  background: #f5eeee;
}

.holiday-item button:hover {
  color: white;
  background: var(--red);
}

.holiday-actions {
  display: grid;
  gap: 8px;
}

.holiday-item .edit-button {
  color: var(--green);
  background: #edf5f2;
}

.holiday-item .edit-button:hover {
  color: white;
  background: var(--green);
}

.holiday-item strong, .holiday-item span { overflow-wrap: anywhere; }

.summary-block {
  display: grid;
  gap: 12px;
  margin-bottom: 18px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.route-summary {
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}

.summary-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}

.route-card {
  display: grid;
  gap: 9px;
  align-content: start;
}

.route-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.route-card-head span {
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
}

.summary-card strong,
.route-card-head strong {
  display: block;
  color: var(--green-dark);
  font-size: 28px;
  line-height: 1;
}

.route-card small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.route-card ul {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.route-card li {
  color: #344653;
  font-size: 13px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.request-toolbar {
  display: grid;
  gap: 13px;
  margin-bottom: 12px;
}

.filters {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(140px, 0.8fr));
  gap: 10px;
  align-items: end;
}

.tool-actions {
  display: flex;
  gap: 8px;
  grid-column: 1 / -1;
  justify-self: end;
}

.status-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}

.manual-panel {
  display: grid;
  gap: 14px;
  margin: 0 0 14px;
  border: 1px solid #b8d7cc;
  border-radius: 8px;
  padding: 16px;
  background: #f8fdfb;
}

.manual-panel.hidden { display: none; }

.manual-form {
  display: grid;
  gap: 13px;
}

.manual-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.status-chips button {
  min-height: 38px;
  border: 1px solid var(--line);
  padding: 8px 13px;
  color: var(--green);
  background: #f7fbfa;
}

.status-chips button.active {
  border-color: var(--green);
  color: white;
  background: var(--green);
}

.options-panel {
  margin: 0 0 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdfd;
  overflow: hidden;
}

.options-panel summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  min-height: 50px;
  padding: 13px 15px;
  color: var(--green-dark);
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.options-panel summary::-webkit-details-marker { display: none; }

.options-panel summary::after {
  content: "열기";
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 10px;
  color: var(--green);
  background: #f2f8f6;
  font-size: 12px;
}

.options-panel[open] summary::after { content: "닫기"; }

.options-panel small {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.options-grid {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(320px, 1.2fr);
  gap: 12px;
  padding: 0 15px 15px;
}

.options-panel:not([open]) .options-grid {
  display: none;
}

.option-card {
  display: grid;
  gap: 12px;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 15px;
  background: white;
}

.option-card .section-heading { margin-bottom: 0; }

.export-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.class-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
}

.class-list {
  display: grid;
  gap: 8px;
}

.class-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: 8px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--soft);
}

.class-item button {
  min-height: 40px;
  padding: 8px 11px;
}

.request-list {
  display: grid;
  gap: 12px;
}

.request-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  background: var(--soft);
}

.request-card.pending {
  border-color: #b8d7cc;
  background: #f8fdfb;
}

.request-card.cancelled, .request-card.rejected { opacity: 0.72; }

.request-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  margin-bottom: 12px;
}

.request-title strong {
  display: block;
  font-size: 18px;
  line-height: 1.35;
}

.request-title span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border-radius: 999px;
  padding: 0 10px;
  color: white;
  background: var(--blue);
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
}

.badge.exception { background: var(--amber); }
.badge.status { background: var(--green); }
.badge.status.pending { background: var(--blue); }
.badge.status.hold { background: var(--amber); }
.badge.status.rejected, .badge.status.cancelled { background: var(--red); }

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.compact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.compact-grid div {
  border: 1px solid #e1e9ed;
  border-radius: 8px;
  padding: 10px;
  background: white;
}

.compact-grid span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.compact-grid strong {
  display: block;
  margin-top: 5px;
  font-size: 14px;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.request-details {
  margin-top: 12px;
}

.request-details summary {
  width: fit-content;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 13px;
  color: var(--green-dark);
  background: #edf5f2;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

.request-details summary::-webkit-details-marker { display: none; }

.request-details[open] summary {
  margin-bottom: 12px;
}

.detail {
  min-height: 76px;
  border: 1px solid #e1e9ed;
  border-radius: 8px;
  padding: 11px;
  background: white;
}

.detail span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.detail strong, .detail p {
  margin: 6px 0 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.card-actions {
  display: grid;
  grid-template-columns: 128px minmax(200px, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.status-select { max-width: 128px; }
.teacher-memo-input { min-width: 0; }
.delete-button { color: var(--red); background: #f5eeee; }
.delete-button:hover { color: white; background: var(--red); }

.quick-actions {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 6px;
}

.quick-actions button {
  min-height: 40px;
  padding: 8px 10px;
  color: var(--green);
  background: #edf5f2;
}

.quick-actions button:hover {
  color: white;
  background: var(--green);
}

.quick-actions button.reject {
  color: var(--red);
  background: #f7eeee;
}

.quick-actions button.reject:hover {
  color: white;
  background: var(--red);
}

.empty {
  border: 1px dashed #b9c7ce;
  border-radius: 8px;
  padding: 22px;
  color: var(--muted);
  background: #fbfdfd;
  line-height: 1.5;
}

@media (max-width: 1180px) {
  .topbar, .layout { grid-template-columns: 1fr; }
  .filters { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-actions { justify-self: end; }
}

@media (max-width: 820px) {
  .admin-shell {
    width: min(100% - 20px, 1440px);
    padding: 16px 0 28px;
  }

  .topbar, .config-panel, .request-panel { padding: 18px; }

  .metric-row, .field-grid, .summary-grid, .filters, .detail-grid, .compact-grid, .card-actions, .holiday-item, .class-form, .class-item, .options-grid, .export-actions, .config-actions {
    grid-template-columns: 1fr;
  }

  .request-head { grid-template-columns: 1fr; }
  .badge-row { justify-content: flex-start; }

  .tool-actions, .quick-actions {
    display: grid;
    grid-template-columns: 1fr;
    justify-self: stretch;
  }

  .status-select { max-width: none; }

  .options-panel summary {
    display: grid;
    align-items: start;
  }

  h1 { font-size: 30px; }
  h2 { font-size: 20px; }
}