:root {
  color-scheme: light dark;
  --bg: #f4f6fb;
  --panel: #ffffff;
  --border: #d8dce9;
  --text: #1f2430;
  --muted: #5c637a;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.08);
  --success: #1b9c85;
  --warning: #c58a00;
  --error: #c02626;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', 'Hiragino Sans', 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

body {
  padding: 32px;
}

body.size-small { font-size: 14px; }
body.size-medium { font-size: 16px; }
body.size-large { font-size: 18px; }

body.size-small .tab-button { font-size: 13px; padding: 10px; }
body.size-large .tab-button { font-size: 16px; padding: 14px 18px; }

body.size-small .status { font-size: 13px; }
body.size-large .status { font-size: 16px; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 16px;
  margin-bottom: 24px;
}

h1 {
  margin: 4px 0 0;
  font-size: 28px;
}

.hamburger {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--accent);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 999px;
}

.panel {
  background: var(--panel);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 15px 30px rgba(31, 36, 48, 0.08);
}

.tabs-shell {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tab-button {
  flex: 1 1 120px;
  border: 1px solid var(--border);
  background: #f8fafc;
  padding: 12px;
  border-radius: 32px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 10px 20px rgba(37, 99, 235, 0.25);
}

.settings-panel {
  position: fixed;
  top: env(safe-area-inset-top, 0);
  right: -360px;
  width: 320px;
  height: calc(100vh - env(safe-area-inset-top, 0));
  background: #fff;
  box-shadow: -12px 0 30px rgba(31, 36, 48, 0.2);
  padding: 24px;
  transition: right 0.3s ease;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-height: calc(100vh - env(safe-area-inset-top, 0));
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0));
}

.settings-panel.active {
  right: 0;
}

.settings-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 999;
}

.settings-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

@media (max-width: 768px) {
  .settings-panel {
    width: min(320px, 85vw);
  }
}

.settings-panel h2 {
  margin: 0;
  font-size: 20px;
}

.settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.settings-group {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
}

.settings-group h3 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--muted);
}

.settings-group label {
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.02em;
  display: block;
  margin-bottom: 6px;
}

.settings-group select {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 15px;
  background-color: #fff;
}

.ghost-button {
  padding: 8px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.2s ease;
}

.ghost-button:hover {
  background: rgba(37, 99, 235, 0.08);
}

.settings-size-buttons {
  display: flex;
  gap: 8px;
}

.settings-size-button {
  flex: 1;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
}

.settings-size-button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

.status {
  margin: 0 0 16px;
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 15px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.status.info {
  background: var(--accent-soft);
  color: var(--accent);
}

.status.success {
  background: rgba(27, 156, 133, 0.12);
  color: var(--success);
}

.status.warning {
  background: rgba(197, 138, 0, 0.12);
  color: var(--warning);
}

.status.error {
  background: rgba(192, 38, 38, 0.15);
  color: var(--error);
}

.table-wrapper {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.table-size-small { font-size: 13px; }
.table-size-medium { font-size: 14px; }
.table-size-large { font-size: 16px; }

.table-size-small th, .table-size-small td { padding: 10px; }
.table-size-large th, .table-size-large td { padding: 14px 12px; }

thead tr {
  background: #edf2ff;
}

th {
  text-align: center;
  padding: 12px;
  color: var(--muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
}

tbody tr:nth-child(even) {
  background: #f9faff;
}

tbody tr:hover {
  background: rgba(99, 102, 241, 0.08);
}

tbody tr.canceled {
  background: #e0e0e0;
  color: var(--muted);
}

tbody tr.canceled:hover {
  background: #d5d5d5;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 999px;
  font-weight: 600;
  background: rgba(37, 99, 235, 0.1);
  color: var(--accent);
}

.status-chip[data-status="キャンセル"] {
  background: rgba(192, 38, 38, 0.1);
  color: var(--error);
}

.status-chip[data-status="追加"],
.status-chip[data-status="確定"] {
  background: rgba(27, 156, 133, 0.12);
  color: var(--success);
}

.driver-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: #f9faff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
}

.driver-label {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.driver-name {
  margin: 4px 0 0;
  font-size: 20px;
  font-weight: 600;
}

.driver-meta {
  text-align: right;
  color: var(--muted);
}

.driver-meta strong {
  display: block;
  font-size: 24px;
  color: var(--accent);
}

.vehicle-flights {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.flight-card {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 10px 20px rgba(31, 36, 48, 0.06);
}

.flight-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(37, 99, 235, 0.08);
  padding: 14px 18px;
}

.flight-card__header h3 {
  margin: 0;
  font-size: 18px;
  color: var(--accent);
}

.flight-card__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border-radius: 999px;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  font-weight: 600;
  color: var(--accent);
}

.flight-card__body {
  padding: 0 18px 18px;
}

.vehicle-flight-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 14px;
}

.size-small .vehicle-flight-table { font-size: 13px; }
.size-large .vehicle-flight-table { font-size: 16px; }

.size-small .vehicle-flight-table th, .size-small .vehicle-flight-table td { padding: 8px; }
.size-large .vehicle-flight-table th, .size-large .vehicle-flight-table td { padding: 12px 10px; }

.vehicle-flight-table thead th {
  text-align: left;
  color: var(--muted);
  font-size: 12px;
  padding: 8px;
  text-transform: uppercase;
}

.vehicle-flight-table tbody td {
  padding: 10px 8px;
  border-top: 1px solid var(--border);
}

.flight-summary td {
  background: rgba(37, 99, 235, 0.08);
  border-bottom: 0;
  padding: 10px 14px;
}

.flight-summary__content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--accent);
}

.flight-name {
  font-size: 16px;
}

.flight-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--accent);
  font-size: 13px;
  min-width: 72px;
  text-align: center;
}

.placeholder {
  padding: 24px;
  border: 1px dashed var(--border);
  border-radius: 12px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 768px) {
  body { padding: 16px; }
  .page-header { flex-direction: column; align-items: flex-start; }
  table { font-size: 13px; }
  th, td { padding: 10px 8px; }
}