:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #1f2a37;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-soft: #e0e7ff;
  --border: #e5e7eb;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: linear-gradient(180deg, #eef2ff 0%, var(--bg) 45%);
  color: var(--text);
}

.dashboard-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 250px 1fr;
}

.sidebar {
  padding: 24px 20px;
  border-right: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.75);
  backdrop-filter: blur(6px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 30px;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.brand h1 {
  margin: 0;
  font-size: 1.05rem;
}

.brand p {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

nav {
  display: grid;
  gap: 8px;
}

.nav-item {
  text-decoration: none;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 10px;
  transition: all 0.25s ease;
}

.nav-item:hover,
.nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  transform: translateX(4px);
}

.main-content {
  padding: 24px;
  display: grid;
  gap: 20px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.topbar {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.topbar h2 {
  margin: 0;
  font-size: 1.35rem;
}

.topbar p {
  margin: 6px 0 0;
  color: var(--muted);
}

.primary-btn {
  border: none;
  background: var(--primary);
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.35);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-card {
  padding: 16px;
  transition: transform 0.25s ease;
}

.stat-card:hover {
  transform: translateY(-3px);
}

.stat-card p {
  margin: 0;
  color: var(--muted);
}

.stat-card h3 {
  margin: 10px 0 8px;
  font-size: 1.6rem;
}

.trend {
  font-size: 0.85rem;
  font-weight: 600;
}

.trend.up {
  color: var(--success);
}

.trend.down {
  color: var(--danger);
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 16px 0;
}

.card-head h3 {
  margin: 0;
}

.subtle {
  color: var(--muted);
  font-size: 0.85rem;
}

canvas {
  width: 100%;
  height: auto;
  padding: 8px 16px 16px;
}

.table-wrapper {
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
}

th {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

tbody tr {
  cursor: pointer;
  transition: background 0.2s ease;
}

tbody tr:hover {
  background: #f8fafc;
}

.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 700;
}

.badge.paid {
  background: #dcfce7;
  color: var(--success);
}

.badge.pending {
  background: #fef3c7;
  color: var(--warning);
}

.badge.failed {
  background: #fee2e2;
  color: var(--danger);
}

.modal {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 20;
}

.modal.open {
  display: flex;
  animation: fadeIn 0.25s ease;
}

.modal-content {
  width: min(620px, 100%);
  padding: 22px;
  position: relative;
  animation: slideUp 0.25s ease;
}

.modal-close {
  position: absolute;
  right: 10px;
  top: 10px;
  border: none;
  background: transparent;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--muted);
}

.modal-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 16px;
}

.modal-grid p {
  margin: 0;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(12px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 1100px) {
  .stats-grid,
  .charts-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 800px) {
  .dashboard-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    display: none;
  }

  .stats-grid,
  .charts-grid,
  .modal-grid {
    grid-template-columns: 1fr;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }
}


.customer-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.customer-card {
  padding: 16px;
}

.customer-card h3 {
  margin: 0 0 6px;
  font-size: 1.1rem;
}

.customer-card p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.button-row {
  display: flex;
  gap: 8px;
}

.ghost-btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: 6px 12px;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.ghost-btn.small {
  padding: 4px 10px;
  font-size: 0.85rem;
}



@media (max-width: 1100px) {
  .customer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 800px) {
  .customer-grid {
    grid-template-columns: 1fr;
  }
}


/* ========== Settings Page Styles ========== */

.settings-sections {
  display: grid;
  gap: 20px;
}

.settings-section {
  padding: 24px;
}

.section-header {
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border);
}

.section-header h3 {
  margin: 0 0 6px;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Settings Grid (for form inputs) */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.setting-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.setting-item.full-width {
  grid-column: 1 / -1;
}

.setting-item label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
}

.setting-item input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  transition: all 0.2s ease;
  background: var(--surface);
}

.setting-item input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

/* Settings List (for toggles and actions) */
.settings-list {
  display: grid;
  gap: 16px;
}

.setting-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px;
  border-radius: 12px;
  transition: background 0.2s ease;
}

.setting-item-row:hover {
  background: #f8fafc;
}

.setting-info h4 {
  margin: 0 0 4px;
  font-size: 1rem;
  font-weight: 600;
}

.setting-description {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 48px;
  height: 26px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #cbd5e1;
  transition: 0.3s;
  border-radius: 34px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  transition: 0.3s;
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .toggle-slider {
  background-color: var(--primary);
}

.toggle-switch input:checked + .toggle-slider:before {
  transform: translateX(22px);
}

.toggle-switch input:focus + .toggle-slider {
  box-shadow: 0 0 0 3px var(--primary-soft);
}

/* Select Wrapper */
.select-wrapper {
  position: relative;
}

.select-wrapper select {
  width: 100%;
  padding: 10px 36px 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  background: var(--surface);
  cursor: pointer;
  transition: all 0.2s ease;
  appearance: none;
}

.select-wrapper::after {
  content: "▼";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--muted);
  font-size: 0.7rem;
}

.select-wrapper select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}

.select-wrapper.inline-select {
  min-width: 140px;
}

/* Danger Zone */
.setting-item-row.danger-zone {
  border: 1px solid #fee2e2;
  background: #fef2f2;
}

.setting-item-row.danger-zone:hover {
  background: #fee2e2;
}

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

.ghost-btn.danger:hover {
  background: #fee2e2;
  border-color: var(--danger);
}

/* Settings Actions */
.settings-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

/* Responsive Design for Settings */
@media (max-width: 900px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
  
  .setting-item.full-width {
    grid-column: 1;
  }
}

@media (max-width: 600px) {
  .settings-section {
    padding: 16px;
  }
  
  .setting-item-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  
  .toggle-switch,
  .ghost-btn.small,
  .select-wrapper.inline-select {
    align-self: flex-start;
  }
  
  .settings-actions {
    flex-direction: column;
  }
  
  .settings-actions button {
    width: 100%;
  }
}