:root {
  color-scheme: light;
  --bg: #eaf6f8;
  --surface: #ffffff;
  --surface-strong: #edf7fb;
  --input-bg: #e8f0ff;
  --border: #d7e4ef;
  --ink: #1c2f4a;
  --muted: #6e819c;
  --accent: #2898ae;
  --accent-strong: #207f94;
  --danger: #b42318;
  --warning-bg: #fff5d6;
  --shadow: 0 18px 46px rgba(28, 47, 74, 0.1);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--ink);
  font-family: "Yu Gothic", "Meiryo", system-ui, sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 32px 20px;
  background: linear-gradient(135deg, #238aa2, #2aa4b9);
  border-bottom: 1px solid #1d7d93;
  box-shadow: var(--shadow);
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 6px;
  color: #d8f4f7;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: 30px;
  line-height: 1.2;
  color: #ffffff;
}

.company-name {
  margin: 8px 0 0;
  color: #eefcff;
  font-size: 15px;
  font-weight: 700;
}

.login-user {
  margin: 4px 0 0;
  color: #d8f4f7;
  font-size: 13px;
  font-weight: 700;
}

h2 {
  margin-bottom: 4px;
  font-size: 20px;
}

.header-actions {
  display: flex;
  align-items: end;
  gap: 12px;
}

.header-actions select,
.header-actions input {
  min-width: 160px;
}

.header-button {
  border-color: #ffffff;
  background: #ffffff;
  color: var(--accent-strong);
  box-shadow: 0 8px 18px rgba(28, 47, 74, 0.16);
}

.header-button:hover {
  background: #e8f0ff;
  color: var(--accent-strong);
}

.logout-button {
  border-color: rgba(255, 255, 255, 0.68);
  background: transparent;
  color: #ffffff;
}

.logout-button:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #ffffff;
}

label {
  display: grid;
  gap: 6px;
  color: inherit;
  font-size: 13px;
  font-weight: 700;
}

input,
select {
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  background: var(--input-bg);
  color: var(--ink);
}

button {
  min-height: 40px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 14px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
}

button:hover {
  background: var(--accent-strong);
}

.small-button {
  justify-self: start;
  min-height: 32px;
  padding: 5px 12px;
  font-size: 13px;
}

.secondary-button {
  border-color: var(--border);
  background: #fff;
  color: var(--accent-strong);
}

.secondary-button:hover {
  background: var(--surface-strong);
}

.danger-button {
  border-color: #f0b4ad;
  background: #fff;
  color: var(--danger);
}

.danger-button:hover {
  background: #fff1ef;
}

.form-actions,
.row-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

main {
  padding: 24px 32px 40px;
}

.workbench {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.tabs {
  display: flex;
  gap: 2px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-strong);
  padding: 8px;
}

.tab {
  background: transparent;
  color: var(--ink);
  border-color: transparent;
}

.tab:hover,
.tab.is-active {
  background: #fff;
  color: var(--accent-strong);
  border-color: var(--border);
}

.view {
  display: none;
  padding: 20px;
}

.view.is-active {
  display: block;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-head p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 13px;
}

.table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 880px;
  border-collapse: collapse;
  background: #fff;
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 12px;
  text-align: left;
  white-space: nowrap;
  font-size: 14px;
}

th {
  background: #f7fbfd;
  color: var(--muted);
  font-size: 12px;
}

tr:last-child td {
  border-bottom: 0;
}

.row-shortage td {
  background: #fff8e6;
}

.row-overdue td {
  background: #fff1ef;
}

.row-achieved td {
  background: #eefaf7;
}

.danger {
  color: var(--danger);
  font-weight: 700;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 700;
}

.status-warning {
  background: #fff0c2;
  color: #8a5b00;
}

.status-danger {
  background: #ffd9d4;
  color: var(--danger);
}

.status-success {
  background: #dff4e8;
  color: #166344;
}

.status-muted {
  background: #edf0eb;
  color: var(--muted);
}

.empty {
  color: var(--muted);
  text-align: center;
}

.audit-detail {
  max-width: 560px;
  max-height: 220px;
  overflow: auto;
  margin: 8px 0 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  background: #f7fbfd;
  color: var(--ink);
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.usage-layout {
  display: grid;
  grid-template-columns: minmax(260px, 340px) 1fr;
  gap: 16px;
}

.registration-panels,
.history-stack {
  display: grid;
  align-content: start;
  gap: 16px;
}

.history-filter,
.audit-filter {
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: #f7fbfd;
}

.history-filter label,
.audit-filter label {
  min-width: 180px;
  flex: 1 1 180px;
}

.edit-panel {
  display: grid;
  align-content: start;
  gap: 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: #f7fbfd;
}

.collapsible-panel {
  gap: 0;
}

.edit-panel h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.wide-panel {
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 14px;
}

.compact-grid {
  grid-template-columns: minmax(240px, 420px);
}

.checkbox-label {
  display: flex;
  align-items: center;
  min-height: 40px;
  gap: 8px;
}

.checkbox-label input {
  min-height: auto;
}

.panel-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  min-height: 44px;
  border-color: transparent;
  padding: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.panel-toggle:hover {
  background: transparent;
  color: var(--accent-strong);
}

.panel-toggle span:first-child {
  font-size: 22px;
  line-height: 1.25;
}

.toggle-indicator {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  background: #fff;
  color: var(--accent-strong);
  font-size: 13px;
}

.panel-body {
  display: grid;
  gap: 14px;
  padding-top: 14px;
}

.panel-body[hidden] {
  display: none;
}

.panel-note {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.import-preview {
  display: grid;
  gap: 10px;
}

.preview-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 700;
}

.preview-summary span {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  background: #fff;
}

.compact-table {
  max-height: 260px;
  overflow: auto;
}

.form-message {
  min-height: 20px;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}

.form-message.is-error {
  color: var(--danger);
}

.form-message.is-success {
  color: var(--accent-strong);
}

.settings-list {
  display: grid;
  grid-template-columns: minmax(160px, 240px) 1fr;
  max-width: 720px;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.settings-list dt,
.settings-list dd {
  margin: 0;
  border-bottom: 1px solid var(--border);
  padding: 12px;
}

.settings-list dt {
  background: #f7fbfd;
  color: var(--muted);
  font-weight: 700;
}

.settings-list dd:nth-last-child(-n + 2),
.settings-list dt:nth-last-child(-n + 2) {
  border-bottom: 0;
}

@media (max-width: 820px) {
  .app-header,
  .section-head,
  .header-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .app-header {
    padding: 18px 16px 14px;
  }

  main {
    padding: 16px;
  }

  .usage-layout {
    grid-template-columns: 1fr;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .tabs {
    overflow-x: auto;
  }
}