:root {
  --color-bg: #ffffff;
  --color-surface: #f7f7f7;
  --color-text: #111111;
  --color-muted: #666666;
  --color-border: #e5e5e5;
  --color-primary: #111111;
  --color-primary-text: #ffffff;
  --color-accent: #164f4a;
  --color-accent-light: #e8f2f1;
  --color-success: #22c55e;
  --color-danger: #ef4444;
  --color-warning: #f59e0b;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);
  --max-width: 560px;
  --bottom-nav-base-height: 72px;
  --bottom-nav-height: calc(var(--bottom-nav-base-height) + env(safe-area-inset-bottom, 0px));
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
}

body {
  padding-bottom: var(--bottom-nav-height);
}

#app {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  min-height: calc(100vh - var(--bottom-nav-height));
}

/* Typography */
h1, h2, h3, h4 {
  margin: 0 0 12px;
  font-weight: 700;
}

p {
  margin: 0 0 12px;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Screen layout */
.screen {
  padding: 24px 20px 32px;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.screen-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.screen-header h1 {
  flex: 1;
  margin: 0;
  font-size: 1.6rem;
}

/* Header / logo */
.app-header {
  text-align: center;
  margin-bottom: 28px;
}

.app-header .logo {
  width: 72px;
  height: 72px;
  margin-bottom: 12px;
}

.app-header h1 {
  font-size: 1.8rem;
  margin-bottom: 4px;
}

.app-header p {
  color: var(--color-muted);
  font-size: 0.95rem;
  margin: 0;
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 14px;
  color: var(--color-text);
}

/* Dashboard stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  text-align: left;
}

.stat-card .stat-label {
  font-size: 0.8rem;
  color: var(--color-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 6px;
}

.stat-card .stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  background: var(--color-primary);
  color: var(--color-primary-text);
  padding: 14px 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: opacity 0.15s, transform 0.1s;
}

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

.btn:hover {
  opacity: 0.92;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

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

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

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

.btn-small {
  padding: 8px 14px;
  font-size: 0.85rem;
  width: auto;
}

.button-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 24px;
}

.button-row {
  display: flex;
  gap: 10px;
}

.button-row .btn {
  flex: 1;
}

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

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.form-group .hint {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 4px;
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="tel"],
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  font-family: inherit;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

input[type="range"] {
  width: 100%;
  margin: 10px 0;
}

textarea {
  min-height: 80px;
  resize: vertical;
}

/* Wizard */
.wizard-header {
  margin-bottom: 24px;
}

.wizard-progress {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
}

.wizard-step {
  flex: 1;
  height: 6px;
  border-radius: 3px;
  background: var(--color-border);
}

.wizard-step.active {
  background: var(--color-accent);
}

.wizard-step.completed {
  background: var(--color-accent);
  opacity: 0.5;
}

.wizard-step-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--color-muted);
}

/* Add-ons */
.add-on-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.add-on-category {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-muted);
  margin: 16px 0 8px;
}

.add-on-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.add-on-item.selected {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.add-on-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.add-on-header input[type="checkbox"] {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--color-accent);
}

.add-on-info {
  flex: 1;
}

.add-on-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.add-on-price {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.add-on-quantity {
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.add-on-quantity label {
  font-size: 0.85rem;
  font-weight: 500;
}

.add-on-quantity input {
  width: 80px;
}

.add-on-subtotal {
  font-size: 0.9rem;
  font-weight: 600;
  margin-top: 8px;
  color: var(--color-accent);
}

.add-ons-total {
  display: flex;
  justify-content: space-between;
  padding: 16px 0;
  border-top: 1px solid var(--color-border);
  margin-top: 16px;
  font-weight: 700;
  font-size: 1.05rem;
}

/* Quote result */
.margin-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}

.margin-card {
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px 10px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}

.margin-card:hover {
  border-color: var(--color-accent);
}

.margin-card.active {
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.margin-card .margin-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.margin-card .margin-value {
  font-size: 1.25rem;
  font-weight: 700;
}

.slider-value {
  font-weight: 700;
  color: var(--color-accent);
}

.final-amount-section {
  background: var(--color-accent-light);
  border: 1px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 24px;
}

.copy-message {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-muted);
}

/* Quote list */
.quote-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.quote-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.quote-card-title {
  font-weight: 700;
  font-size: 1.05rem;
}

.quote-card-date {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.quote-card-meta {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

.quote-card-value {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.status-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-pending {
  background: #fef3c7;
  color: #92400e;
}

.status-accepted {
  background: #dcfce7;
  color: #166534;
}

.status-declined {
  background: #fee2e2;
  color: #991b1b;
}

.quote-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

/* Client list */
.client-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.client-name {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.client-meta {
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Settings */
.settings-section {
  margin-bottom: 28px;
}

.settings-section h2 {
  font-size: 1.1rem;
  margin-bottom: 14px;
}

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

.addon-price-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.addon-price-row:last-child {
  border-bottom: none;
}

.addon-price-info {
  flex: 1;
}

.addon-price-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.addon-price-unit {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.addon-price-input {
  display: flex;
  align-items: center;
  gap: 6px;
}

.addon-price-input input {
  width: 90px;
  text-align: right;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 20px;
  color: var(--color-muted);
}

.empty-state h3 {
  margin-bottom: 8px;
  color: var(--color-text);
}

/* Filters */
.filter-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin-bottom: 18px;
}

/* Language selector */
.home-language-card {
  padding: 14px 16px;
  margin-top: -8px;
  margin-bottom: 20px;
}

.language-selector {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: space-between;
}

.language-selector label {
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 700;
}

.language-selector select {
  flex: 0 1 180px;
  min-width: 140px;
}

/* Notes list */
.notes-list {
  list-style: disc;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.notes-list li {
  margin-bottom: 6px;
}

/* Summary */
.summary-row {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.summary-row.total {
  font-weight: 700;
  font-size: 1.05rem;
  border-bottom: none;
}

/* Toast */
.toast {
  position: fixed;
  bottom: calc(var(--bottom-nav-height) + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: var(--color-primary-text);
  padding: 12px 20px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  z-index: 100;
  animation: slideUp 0.2s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

/* Bottom navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--max-width);
  height: var(--bottom-nav-height);
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: flex-start;
  padding: 0 8px env(safe-area-inset-bottom, 0px);
  z-index: 50;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-width: 0;
  height: var(--bottom-nav-base-height);
  gap: 4px;
  padding: 8px 4px 10px;
  color: var(--color-muted);
  transition: color 0.15s;
}

.nav-item.active {
  color: var(--color-accent);
}

.nav-icon {
  font-size: 1.3rem;
}

.nav-label {
  max-width: 100%;
  overflow: hidden;
  font-size: 0.68rem;
  font-weight: 600;
  line-height: 1;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Back button */
.back-button {
  background: none;
  border: none;
  padding: 6px;
  font-size: 1.3rem;
  cursor: pointer;
  color: var(--color-text);
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 20px;
}

.modal-content {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 24px;
  max-width: 360px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}

/* Responsive */
@media (min-width: 640px) {
  .screen {
    padding: 32px 24px 40px;
  }

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

  .button-group {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .button-group .btn {
    flex: 1;
    min-width: 160px;
  }

  .margin-cards {
    gap: 14px;
  }
}

@media (max-width: 420px) {
  .screen {
    padding-right: 16px;
    padding-left: 16px;
  }

  .language-selector {
    align-items: stretch;
    flex-direction: column;
  }

  .language-selector select {
    flex: none;
    min-width: 0;
  }
}