:root {
  --bg-main: #F8FAFC;
  --bg-sidebar: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F1F5F9;
  --bg-surface: #F8FAFC;
  --border-color: #E2E8F0;
  --border-focus: #2563EB;
  --primary: #0F172A;
  --primary-hover: #1E293B;
  --accent: #2563EB;
  --accent-hover: #1D4ED8;
  --accent-light: #EFF6FF;
  --success: #059669;
  --success-light: #ECFDF5;
  --success-border: #A7F3D0;
  --warning: #D97706;
  --warning-light: #FFFBEB;
  --warning-border: #FDE68A;
  --danger: #DC2626;
  --danger-light: #FEF2F2;
  --danger-border: #FECACA;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --text-dim: #94A3B8;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-card: 0 1px 3px 0 rgba(0, 0, 0, 0.06), 0 1px 2px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-drawer: 4px 0 24px rgba(0, 0, 0, 0.12);
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* -------------------------------------------------------------
   Authentication Viewport (Login)
------------------------------------------------------------- */
.auth-viewport {
  min-height: 100vh;
  width: 100vw;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-main);
  padding: 20px;
}

.auth-container {
  width: 100%;
  max-width: 400px;
}

.auth-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-lg);
}

.auth-header {
  text-align: center;
  margin-bottom: 28px;
}

.auth-logo {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #FFFFFF;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.auth-header h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.3px;
  margin-bottom: 6px;
}

.auth-header p {
  font-size: 13px;
  color: var(--text-muted);
}

.login-alert {
  background: var(--danger-light);
  border: 1px solid var(--danger-border);
  color: var(--danger);
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 18px;
}

.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

.form-input {
  width: 100%;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-main);
  outline: none;
  transition: var(--transition);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.btn-block {
  width: 100%;
  padding: 12px;
  font-size: 14px;
}

.auth-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 11px;
  color: var(--text-dim);
}

/* -------------------------------------------------------------
   Layout Structure
------------------------------------------------------------- */
.app-container {
  display: flex;
  width: 100vw;
  min-height: 100vh;
  position: relative;
}

/* Sidebar Backdrop for Mobile */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: blur(2px);
  z-index: 95;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.sidebar-backdrop.active {
  display: block;
  opacity: 1;
}

/* Sidebar */
.sidebar {
  width: 260px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  z-index: 90;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.brand-section {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-color);
}

.brand-identity {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
}

.brand-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--text-main);
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.sidebar-close-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-xs);
}

.sidebar-close-btn:hover {
  color: var(--text-main);
  background: var(--bg-card-hover);
}

.nav-menu {
  padding: 16px 12px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow-y: auto;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  cursor: pointer;
}

.nav-item:hover {
  background-color: var(--bg-card-hover);
  color: var(--text-main);
}

.nav-item.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 600;
}

.nav-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* User Profile in Sidebar */
.user-profile {
  padding: 14px 18px;
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: #FAFAFA;
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 13px;
  color: var(--text-main);
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

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

/* -------------------------------------------------------------
   Main Content Area
------------------------------------------------------------- */
.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--bg-main);
}

.topbar {
  height: 64px;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 30;
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
}

.mobile-menu-btn:hover {
  background: var(--bg-card-hover);
}

.page-title-group h1 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.2px;
  line-height: 1.2;
}

.page-title-group p {
  font-size: 12px;
  color: var(--text-muted);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.system-status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--success);
  background: var(--success-light);
  padding: 5px 10px;
  border-radius: 9999px;
  border: 1px solid var(--success-border);
}

.status-indicator {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.lang-switch {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  outline: none;
}

.lang-switch:focus {
  border-color: var(--accent);
}

.topbar-logout-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}

.topbar-logout-btn:hover {
  color: var(--danger);
  border-color: var(--danger-border);
  background: var(--danger-light);
}

/* Page Body */
.page-body {
  padding: 28px 32px;
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
}

/* -------------------------------------------------------------
   Stats Grid
------------------------------------------------------------- */
.grid-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.stat-card:hover {
  border-color: #CBD5E1;
}

.stat-label {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 6px;
}

.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.5px;
}

.stat-subtext {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.stat-subtext.positive {
  color: var(--success);
}

/* -------------------------------------------------------------
   Buttons
------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  outline: none;
  transition: var(--transition);
  text-decoration: none;
  line-height: 1.2;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--primary-hover);
}

.btn-accent {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-accent:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-success {
  background: var(--success);
  color: #FFFFFF;
}

.btn-success:hover:not(:disabled) {
  background: #047857;
}

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

.btn-danger:hover:not(:disabled) {
  background: #B91C1C;
}

.btn-outline {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.btn-outline:hover:not(:disabled) {
  background: var(--bg-card-hover);
  border-color: #CBD5E1;
}

.btn-sm {
  padding: 6px 10px;
  font-size: 12px;
}

/* -------------------------------------------------------------
   POS Terminal Screen
------------------------------------------------------------- */
.pos-layout {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: 24px;
}

.pos-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.pos-input-group {
  margin-bottom: 20px;
}

.pos-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.pos-input {
  width: 100%;
  background: #FFFFFF;
  border: 1.5px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  color: var(--text-main);
  font-size: 17px;
  font-weight: 600;
  outline: none;
  transition: var(--transition);
}

.pos-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.amount-presets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.preset-btn {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 9px;
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.preset-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* Virtual Card Visualizer (Clean Minimalist Design) */
.virtual-card {
  width: 100%;
  height: 190px;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 20px;
  color: #FFFFFF;
}

.card-chip {
  width: 38px;
  height: 28px;
  background: linear-gradient(135deg, #E2E8F0, #94A3B8);
  border-radius: 5px;
}

.card-brand-tag {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: #94A3B8;
  text-transform: uppercase;
}

.card-number-display {
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 3px;
  color: #FFFFFF;
  font-family: monospace;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.card-holder-name {
  font-size: 12.5px;
  text-transform: uppercase;
  color: #E2E8F0;
  font-weight: 600;
}

.card-balance-display {
  text-align: right;
}

.card-balance-val {
  font-size: 17px;
  font-weight: 700;
  color: #34D399;
}

/* POS Receipt Box */
.receipt-box {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.receipt-header {
  text-align: center;
  margin-bottom: 16px;
}

.receipt-icon {
  width: 42px;
  height: 42px;
  background: var(--success-light);
  color: var(--success);
  border: 1px solid var(--success-border);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
}

.receipt-details {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  padding: 14px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.receipt-row {
  display: flex;
  justify-content: space-between;
}

.receipt-row-label {
  color: var(--text-muted);
}

.receipt-row-val {
  font-weight: 600;
  color: var(--text-main);
}

/* -------------------------------------------------------------
   Tables & Responsiveness
------------------------------------------------------------- */
.table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.table-header-bar {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.table-header-bar h2 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
}

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.data-table th {
  background: #F8FAFC;
  padding: 12px 18px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

.data-table td {
  padding: 14px 18px;
  font-size: 13px;
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  white-space: nowrap;
}

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

.data-table tr:hover td {
  background: var(--bg-card-hover);
}

/* -------------------------------------------------------------
   Badges
------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: 9999px;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.2;
}

.badge-active { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-blocked { background: var(--danger-light); color: var(--danger); border: 1px solid var(--danger-border); }
.badge-requested { background: var(--warning-light); color: var(--warning); border: 1px solid var(--warning-border); }
.badge-completed { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-neutral { background: #F1F5F9; color: var(--text-muted); border: 1px solid var(--border-color); }
.badge-unassigned { background: #F8FAFC; color: #475569; border: 1px dashed #94A3B8; font-weight: 600; }
.badge-credit { background: var(--success-light); color: var(--success); border: 1px solid var(--success-border); }
.badge-debit { background: var(--danger-light); color: var(--danger); border: 1px solid var(--danger-border); }

/* POS Terminal Enhancements */
.pos-tabs { display: flex; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; }
.pos-tab-btn { padding: 9px 18px; border-radius: var(--radius-sm); border: 1px solid var(--border-color); background: #FFFFFF; font-size: 13.5px; font-weight: 600; color: var(--text-muted); cursor: pointer; transition: var(--transition); }
.pos-tab-btn.active { background: var(--primary); color: #FFFFFF; border-color: var(--primary); }
.pos-tab-btn:hover:not(.active) { background: var(--bg-card-hover); color: var(--text-main); }
.history-table-container { margin-top: 24px; background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-md); padding: 20px; box-shadow: var(--shadow-card); }
.history-table-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.history-table-header h3 { font-size: 16px; font-weight: 700; color: var(--text-main); }
.search-input-group { display: flex; gap: 8px; align-items: center; }
.filter-tabs { display: flex; gap: 6px; }
.filter-tab-btn { padding: 6px 12px; border-radius: var(--radius-xs); border: 1px solid var(--border-color); background: #FFFFFF; font-size: 12.5px; font-weight: 500; color: var(--text-muted); cursor: pointer; transition: var(--transition); }
.filter-tab-btn.active { background: var(--primary); color: #FFFFFF; border-color: var(--primary); font-weight: 600; }


/* -------------------------------------------------------------
   Toast Notifications
------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 120;
  max-width: calc(100vw - 40px);
}

.toast {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  min-width: 280px;
  max-width: 400px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  animation: toastSlideIn 0.25s ease-out;
}

.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }

@keyframes toastSlideIn {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* -------------------------------------------------------------
   Modals
------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 110;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  padding: 16px;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 520px;
  padding: 28px;
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  transform: scale(0.96);
  transition: var(--transition);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

/* -------------------------------------------------------------
   Responsive Breakpoints (Mobile & Tablet)
------------------------------------------------------------- */
@media (max-width: 1024px) {
  /* Hide static sidebar, transform into slide-out drawer */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    height: 100vh;
    transform: translateX(-100%);
    box-shadow: var(--shadow-drawer);
    z-index: 100;
  }

  .sidebar.mobile-open {
    transform: translateX(0);
  }

  .sidebar-close-btn {
    display: flex;
  }

  .mobile-menu-btn {
    display: inline-flex;
  }

  .topbar {
    padding: 0 20px;
  }

  .page-body {
    padding: 20px;
  }

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

@media (max-width: 768px) {
  .page-body {
    padding: 16px;
  }

  .topbar {
    padding: 0 16px;
    height: 60px;
  }

  .page-title-group h1 {
    font-size: 15px;
  }

  .page-title-group p {
    display: none;
  }

  .system-status-pill {
    display: none;
  }

  .topbar-logout-btn span {
    display: none;
  }

  .topbar-logout-btn {
    padding: 6px 8px;
  }

  .grid-stats {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .stat-card {
    padding: 16px;
  }

  .stat-value {
    font-size: 20px;
  }

  .pos-card {
    padding: 20px;
  }

  .modal-card {
    padding: 20px;
  }

  .auth-card {
    padding: 28px 20px;
  }

  .amount-presets {
    grid-template-columns: repeat(2, 1fr);
  }

  .pos-input {
    font-size: 16px; /* Prevents auto-zoom in iOS Safari */
  }

  .form-input {
    font-size: 16px; /* Prevents auto-zoom in iOS Safari */
  }
}