:root {
  --color-bg: #f4f5f7;
  --color-surface: #ffffff;
  --color-primary: #1f2933;
  --color-accent: #c9a24b;
  --color-border: #e2e5ea;
  --color-text: #1f2933;
  --color-muted: #6b7280;
  --color-danger: #c0392b;
  --color-success: #2e7d32;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

a {
  color: inherit;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--color-primary);
  color: #fff;
}

.app-header h1 {
  font-size: 18px;
  margin: 0;
}

.app-header .user-info {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius);
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  background: var(--color-primary);
  color: #fff;
}

.btn:hover {
  opacity: 0.85;
}

.btn:disabled {
  background: #b0b6bd;
  cursor: not-allowed;
  opacity: 0.7;
}

.btn.secondary {
  background: #fff;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

.btn.danger {
  background: var(--color-danger);
}

.btn.small {
  padding: 4px 10px;
  font-size: 12px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.card h2 {
  margin-top: 0;
  font-size: 16px;
  border-left: 4px solid var(--color-accent);
  padding-left: 10px;
}

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-box {
  width: 100%;
  max-width: 360px;
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.login-box h1 {
  text-align: center;
  font-size: 20px;
  margin-bottom: 24px;
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13px;
  color: var(--color-muted);
  margin-bottom: 4px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 14px;
}

.error-message {
  color: var(--color-danger);
  font-size: 13px;
  margin-top: 8px;
  min-height: 18px;
}

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: #fff;
  cursor: pointer;
  font-size: 13px;
}

.tab-btn.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.tab-panel {
  display: none;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

th,
td {
  text-align: left;
  padding: 8px 6px;
  border-bottom: 1px solid var(--color-border);
}

th {
  color: var(--color-muted);
  font-weight: 500;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
}

.badge.confirmed {
  background: #e6f4ea;
  color: var(--color-success);
}

.badge.cancelled {
  background: #fdecea;
  color: var(--color-danger);
}

.badge.pending {
  background: #fff4e0;
  color: #a56b00;
}

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

.form-row .field {
  flex: 1;
  min-width: 140px;
}

.empty-state {
  color: var(--color-muted);
  font-size: 13px;
  padding: 12px 0;
}