:root {
  --bg: #F4F5F7;
  --surface: #FFFFFF;
  --text: #1F2933;
  --accent: #2F6FED;
  --border: #E5E7EB;
  --success: #10B981;
  --radius: 12px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter', system_ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  padding: 16px;
}

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

header {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

h1 { font-size: 26px; font-weight: 700; letter-spacing: -0.5px; }
.subtitle { font-size: 14px; color: #6B7280; }

.mode-toggle {
  display: flex;
  background: #F4F5F7;
  border-radius: 999px;
  padding: 4px;
  gap: 2px;
}

.mode-btn {
  padding: 8px 18px;
  border: none;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn.active {
  background: var(--surface);
  box-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

main {
  margin-bottom: 24px;
}

.view {
  display: block;
}

.section-header {
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 2px;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  margin-bottom: 16px;
}

.service-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 16px;
  border: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.service-info h4 {
  font-size: 15px;
  font-weight: 600;
}

.service-info p {
  font-size: 13px;
  color: #6B7280;
}

.stepper {
  display: flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 999px;
  overflow: hidden;
  background: #F9FAFB;
}

.step-btn {
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  font-size: 22px;
  font-weight: 500;
  cursor: pointer;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-btn:active {
  background: #E5E7EB;
}

.qty {
  font-weight: 600;
  width: 48px;
  text-align: center;
  font-size: 16px;
  background: var(--surface);
  user-select: none;
}

.total-box {
  background: var(--surface);
  padding: 16px 20px;
  border-radius: var(--radius);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border: 1px solid var(--border);
}

.total-label {
  font-size: 14px;
  font-weight: 500;
}

.total-amount {
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
}

.request-form {
  background: var(--surface);
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

@media (max-width: 520px) {
  .form-row { grid-template-columns: 1fr; }
}

.field label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 4px;
}

input, button {
  font-family: inherit;
}

input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
}

button {
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
}

.primary {
  background: var(--accent);
  color: white;
  padding: 12px 22px;
}

.primary.large {
  width: 100%;
  padding: 14px;
  font-size: 16px;
}

.secondary {
  background: #E5E7EB;
  color: #374151;
  padding: 10px 16px;
}

.secondary.small {
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
}

button[disabled] {
  opacity: .6;
  cursor: not-allowed;
}

.empty-state {
  background: var(--surface);
  padding: 28px;
  border-radius: var(--radius);
  text-align: center;
  color: #6B7280;
  font-size: 14px;
  border: 1px solid var(--border);
  margin-bottom: 12px;
}

.manage-list {
  display: grid;
  gap: 10px;
  margin-bottom: 24px;
}

.manage-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: var(--surface);
  border-radius: var(--radius);
  padding: 14px 16px;
  border: 1px solid var(--border);
}

.manage-actions {
  display: flex;
  gap: 8px;
}

.manage-actions button {
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 500;
}

.requests-section {
  margin-top: 12px;
}

.requests-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.requests-header h2 {
  font-size: 18px;
}

#requests-list {
  display: grid;
  gap: 10px;
}

.request-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.req-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  flex-wrap: wrap;
}

.req-header strong {
  font-weight: 600;
}

.req-header .total {
  margin-left: auto;
  font-weight: 700;
  color: var(--accent);
}

.request-card ul {
  margin-top: 8px;
  padding-left: 20px;
  font-size: 13px;
  color: #374151;
}

.request-card li {
  margin: 3px 0;
}

.note {
  font-size: 12px;
  color: #6B7280;
  margin-top: 4px;
}

footer {
  text-align: center;
  font-size: 13px;
  color: #6B7280;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 16px;
}

.modal-box {
  background: var(--surface);
  width: 100%;
  max-width: 420px;
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 0 10px 30px rgba(0,0,0,.2);
}

.modal-box h3 {
  font-size: 18px;
  margin-bottom: 16px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

@media (max-width: 420px) {
  .form-grid { grid-template-columns: 1fr; }
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 18px;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .service-card {
    padding: 14px;
  }
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
}