:root {
  --color-primary: #1a1a2e;
  --color-accent: #e94560;
  --color-success: #4caf50;
  --color-bg: #f5f5f7;
  --color-card: #ffffff;
  --color-text: #1a1a2e;
  --color-text-secondary: #6b7280;
  --color-border: #e5e7eb;
  --color-nav-bg: #ffffff;
  --color-eu-blue: #003399;
  --nav-height: 64px;
  --header-height: 56px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  overflow-x: hidden;
}

/* Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  height: var(--header-height);
  padding: 0 16px;
  background: var(--color-primary);
  color: #fff;
}

.header-title {
  font-size: 18px;
  font-weight: 700;
  flex: 1;
}

.header-back {
  margin-right: 8px;
}

.btn-back {
  background: none;
  border: none;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  padding: 4px 8px;
  line-height: 1;
}

/* Main Content */
.app-content {
  padding-bottom: calc(var(--nav-height) + var(--safe-bottom));
  min-height: calc(100dvh - var(--header-height));
}

/* Bottom Navigation */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  height: calc(var(--nav-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--color-nav-bg);
  border-top: 1px solid var(--color-border);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 11px;
  font-weight: 500;
  gap: 4px;
  transition: color 0.2s;
}

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

.nav-icon {
  width: 24px;
  height: 24px;
}

/* Search bar */
.search-container {
  position: sticky;
  top: var(--header-height);
  z-index: 50;
  padding: 12px 16px;
  background: var(--color-bg);
}

.search-input {
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  font-size: 16px;
  background: var(--color-card);
  color: var(--color-text);
  outline: none;
  -webkit-appearance: none;
}

.search-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

/* Filter chips */
.filter-bar {
  display: flex;
  gap: 8px;
  padding: 0 16px 12px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.filter-bar::-webkit-scrollbar {
  display: none;
}

.filter-chip {
  flex-shrink: 0;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-card);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
}

.filter-chip.active {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.filter-select {
  flex-shrink: 0;
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  background: var(--color-card);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

/* Kennzeichen card list */
.kz-list {
  padding: 0 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kz-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--color-card);
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  border: 1px solid var(--color-border);
}

.kz-card:active {
  transform: scale(0.98);
}

.kz-card.collected {
  border-left: 3px solid var(--color-success);
}

.kz-code {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 64px;
  height: 36px;
  padding: 0 10px;
  background: #fff;
  border: 2px solid #1a1a2e;
  border-radius: 4px;
  font-size: 18px;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  letter-spacing: 1px;
  position: relative;
}

.kz-code::before {
  content: 'D';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 16px;
  background: var(--color-eu-blue);
  color: #fff;
  font-size: 8px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 3px;
  border-radius: 2px 0 0 2px;
  font-family: sans-serif;
  font-weight: 400;
  letter-spacing: 0;
}

.kz-code-text {
  padding-left: 10px;
}

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

.kz-name {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kz-state {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-top: 2px;
}

.kz-collect-btn {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
  font-size: 18px;
  color: var(--color-text-secondary);
}

.kz-collect-btn.collected {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}

/* Detail view */
.detail-view {
  padding: 24px 16px;
}

.detail-plate {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  max-width: 280px;
  height: 72px;
  background: #fff;
  border: 3px solid #1a1a2e;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
}

.detail-plate-eu {
  width: 36px;
  height: 100%;
  background: var(--color-eu-blue);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 6px;
  flex-shrink: 0;
}

.detail-plate-eu .stars {
  font-size: 8px;
  color: gold;
  margin-bottom: 2px;
}

.detail-plate-eu .country {
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.detail-plate-code {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  letter-spacing: 3px;
}

.detail-meta {
  text-align: center;
  margin-bottom: 24px;
}

.detail-meta h2 {
  font-size: 24px;
  margin-bottom: 4px;
}

.detail-meta .detail-type {
  color: var(--color-text-secondary);
  font-size: 14px;
}

.detail-info-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.detail-info-item {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
}

.detail-info-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.detail-info-value {
  font-size: 16px;
  font-weight: 600;
}

.detail-collect-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  background: var(--color-border);
  color: var(--color-text);
}

.detail-collect-btn.collected {
  background: var(--color-success);
  color: #fff;
}

/* Stats view */
.stats-view {
  padding: 16px;
}

.stats-overall {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  margin-bottom: 16px;
}

.stats-overall-count {
  font-size: 48px;
  font-weight: 800;
  color: var(--color-accent);
}

.stats-overall-total {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--color-accent);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.stats-section-title {
  font-size: 16px;
  font-weight: 700;
  margin: 20px 0 12px;
}

.stats-state-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stats-state-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.stats-state-name {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stats-state-progress {
  width: 80px;
  flex-shrink: 0;
}

.stats-state-count {
  font-size: 13px;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  min-width: 48px;
  text-align: right;
}

.stats-recent {
  margin-top: 8px;
}

.stats-recent-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  margin-bottom: 8px;
}

.stats-recent-code {
  font-weight: 700;
  font-family: 'Courier New', monospace;
}

.stats-recent-name {
  flex: 1;
  margin-left: 12px;
  font-size: 14px;
}

.stats-recent-date {
  font-size: 12px;
  color: var(--color-text-secondary);
}

/* Map view */
.map-view {
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.map-container {
  width: 100%;
  max-width: 500px;
}

.map-container svg {
  width: 100%;
  height: auto;
}

.map-container svg path {
  stroke: #fff;
  stroke-width: 1;
  cursor: pointer;
  transition: opacity 0.2s;
}

.map-container svg path:hover {
  opacity: 0.8;
}

.map-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 12px;
  color: var(--color-text-secondary);
}

.map-legend-gradient {
  width: 120px;
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(to right, #e0e0e0, var(--color-success));
}

/* Map overlay */
.map-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}

.map-overlay-content {
  background: var(--color-bg);
  border-radius: 20px 20px 0 0;
  width: 100%;
  max-width: 500px;
  max-height: 70vh;
  overflow-y: auto;
  padding: 20px 16px calc(20px + var(--safe-bottom));
}

.map-overlay-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.map-overlay-header h3 {
  font-size: 18px;
}

.map-overlay-close {
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--color-text-secondary);
  padding: 4px 8px;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--color-text-secondary);
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: 16px;
}

.empty-state-text {
  font-size: 16px;
}

/* Counter badge */
.counter-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--color-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
}

/* Desktop adjustments */
@media (min-width: 768px) {
  .app-content {
    max-width: 600px;
    margin: 0 auto;
  }

  .bottom-nav {
    max-width: 600px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 16px 16px 0 0;
  }

  .kz-card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  }
}