:root {
  --bg-app: #f8fafc;
  --bg-card: #ffffff;
  --border-card: #e2e8f0;
  --border-focus: #0d9488;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --primary-subtle: #f0fdfa;
  --primary-border: #ccfbf1;
  --warning: #d97706;
  --warning-subtle: #fffbeb;
  --warning-border: #fef3c7;
  --danger: #e11d48;
  --danger-subtle: #fff1f2;
  --danger-border: #ffe4e6;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --ease-enter: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-move: cubic-bezier(0.25, 1, 0.5, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-app);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Plus Jakarta Sans", "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 16px;
}

.header {
  background-color: var(--bg-card);
  border-bottom: 1px solid var(--border-card);
  padding: 14px 16px;
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-content {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-group {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.brand-subtitle {
  font-size: 12px;
  color: var(--text-muted);
}

.nav-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 140ms var(--ease-enter);
}

.nav-link:hover {
  color: var(--text-main);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}

.badge-role {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  border-radius: var(--radius-sm);
  background-color: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--primary-border);
}

.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 180ms var(--ease-enter), box-shadow 180ms var(--ease-enter);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.grid-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 16px;
}

@media (max-width: 640px) {
  .grid-metrics {
    grid-template-columns: 1fr;
  }
}

.metric-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: var(--shadow-sm);
}

.metric-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 6px;
}

.metric-value {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.metric-value.highlight {
  color: var(--primary);
}

.notice-box {
  background-color: var(--warning-subtle);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
  font-size: 13px;
  line-height: 1.45;
  color: #92400e;
}

.notice-box strong {
  font-weight: 600;
}

.section-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 120ms var(--ease-enter), background-color 140ms var(--ease-enter);
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

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

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-card);
}

.btn-secondary:hover {
  background-color: var(--bg-app);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.form-group {
  margin-bottom: 14px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  font-size: 14px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  background-color: #ffffff;
  color: var(--text-main);
  transition: border-color 140ms var(--ease-enter), box-shadow 140ms var(--ease-enter);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.12);
}

.expense-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-card);
}

.expense-item:last-child {
  border-bottom: none;
}

.expense-info {
  flex: 1;
  padding-right: 12px;
}

.expense-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

.expense-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.expense-amount {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  text-align: right;
  white-space: nowrap;
}

.ack-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background-color: var(--primary-subtle);
  color: var(--primary);
}

.ack-pill.pending {
  background-color: var(--warning-subtle);
  color: var(--warning);
}

.birthday-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

@media (max-width: 540px) {
  .birthday-list {
    grid-template-columns: 1fr;
  }
}

.birthday-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background-color: var(--bg-app);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.birthday-date {
  font-weight: 600;
  color: var(--primary);
  font-size: 12px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 180ms var(--ease-enter);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  background-color: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  max-width: 520px;
  width: 100%;
  padding: 24px;
  box-shadow: var(--shadow-lg);
  transform: translateY(8px) scale(0.98);
  transition: transform 220ms var(--ease-enter);
}

.modal-backdrop.active .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-header {
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 12px;
  margin-bottom: 16px;
}

.modal-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
}

.modal-subtitle {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.modal-body {
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-main);
}

.receipt-preview {
  width: 100%;
  max-height: 280px;
  object-fit: contain;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-card);
  background-color: #000000;
  margin: 12px 0;
}

.legal-scroll-box {
  max-height: 240px;
  overflow-y: auto;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 12px;
  background-color: var(--bg-app);
  font-size: 12px;
  line-height: 1.5;
  color: #334155;
  margin-bottom: 16px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
}

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

.table th {
  background-color: var(--bg-app);
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-card);
}

.table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border-card);
}

.table tr:last-child td {
  border-bottom: none;
}

.footer {
  text-align: center;
  font-size: 11px;
  color: var(--text-light);
  padding: 24px 16px;
  margin-top: 32px;
  border-top: 1px solid var(--border-card);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}