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

html, body {
  height: 100%;
  overflow: hidden;
}

:root {
  --bg-gradient: radial-gradient(circle at 20% 30%, #1a2a3a, #0b1219);
  --card-bg: rgba(20, 30, 40, 0.55);
  --card-border: rgba(120, 180, 240, 0.2);
  --text-primary: rgba(255, 255, 255, 0.9);
  --text-secondary: #9bb7d4;
  --accent-color: #3e8edd;
  --input-bg: rgba(10, 20, 30, 0.65);
  --input-border: rgba(70, 140, 210, 0.3);
  --select-bg: rgba(8, 18, 28, 0.7);
  --option-bg: #132433;
  --time-glow: #3e8edd80;
  --distance-panel-bg: rgba(0, 0, 0, 0.2);
  --btn-primary: #2e6eb0;
  --shadow-color: rgba(0, 0, 0, 0.6);
  --faq-bg: rgba(0, 0, 0, 0.15);
}

body.light-theme {
  --bg-gradient: radial-gradient(circle at 20% 30%, #eef4fa, #c8d9e8);
  --card-bg: rgba(255, 255, 255, 0.65);
  --card-border: rgba(60, 120, 200, 0.25);
  --text-primary: #1a2a3a;
  --text-secondary: #3a5a7a;
  --accent-color: #2a6ebb;
  --input-bg: rgba(255, 255, 255, 0.8);
  --input-border: rgba(60, 120, 200, 0.4);
  --select-bg: rgba(255, 255, 255, 0.9);
  --option-bg: #e8f0fe;
  --time-glow: #2a6ebb40;
  --distance-panel-bg: rgba(240, 248, 255, 0.5);
  --btn-primary: #1f4b77;
  --shadow-color: rgba(0, 20, 40, 0.3);
  --faq-bg: rgba(0, 0, 0, 0.05);
  color-scheme: light;
}

body {
  background: var(--bg-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Inter', sans-serif;
  padding: 0.8rem;
  transition: background 0.3s ease;
}

.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(14px) saturate(180%);
  -webkit-backdrop-filter: blur(14px) saturate(180%);
  border: 1px solid var(--card-border);
  border-radius: 32px;
  box-shadow: 0 25px 40px -10px var(--shadow-color), 0 0 0 1px rgba(80, 160, 255, 0.1) inset;
  padding: 1.2rem 1.6rem;
  max-width: 820px;
  width: 100%;
  max-height: 100%;
  overflow-y: auto;
  transition: all 0.3s ease;
  color: var(--text-primary);
}

.glass-card::-webkit-scrollbar {
  width: 0;
  background: transparent;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.2rem;
}

h1 {
  font-weight: 500;
  font-size: 1.4rem;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  text-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 6px;
}

h1 span {
  background: rgba(80, 180, 255, 0.18);
  padding: 2px 8px;
  border-radius: 60px;
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--accent-color);
  border: 1px solid var(--card-border);
  margin-left: 4px;
}

.breadcrumbs {
  display: flex;
  gap: 4px;
  margin-bottom: 8px;
  font-size: 0.65rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

.breadcrumbs a {
  color: var(--accent-color);
  text-decoration: none;
}

.theme-toggle {
  display: flex;
  background: var(--distance-panel-bg);
  border-radius: 40px;
  padding: 2px;
  border: 1px solid var(--card-border);
}

.theme-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: 0.2s;
}

.theme-btn.active {
  background: var(--btn-primary);
  color: white;
  box-shadow: 0 2px 6px var(--shadow-color);
}

.subhead {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-weight: 400;
  font-size: 0.8rem;
  border-left: 3px solid var(--accent-color);
  padding-left: 10px;
  opacity: 0.9;
}

.search-wrapper {
  margin-bottom: 8px;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 0.9rem;
  pointer-events: none;
}

#citySearch {
  width: 100%;
  padding: 8px 14px 8px 38px;
  background: var(--input-bg);
  border: 1.5px solid var(--input-border);
  border-radius: 36px;
  font-size: 0.9rem;
  color: var(--text-primary);
  backdrop-filter: blur(8px);
  transition: all 0.25s;
  box-shadow: 0 8px 12px -6px var(--shadow-color);
}

#citySearch:focus {
  outline: none;
  border-color: var(--accent-color);
  background: var(--select-bg);
  box-shadow: 0 0 0 3px rgba(60, 140, 230, 0.2);
}

#citySearch::placeholder {
  color: var(--text-secondary);
  font-weight: 300;
}

.select-container {
  margin-bottom: 10px;
}

#citySelect,
#baseCitySelect {
  width: 100%;
  padding: 8px 16px;
  background: var(--select-bg);
  backdrop-filter: blur(8px);
  border: 1.5px solid var(--input-border);
  border-radius: 30px;
  font-size: 0.95rem;
  color: var(--text-primary);
  font-weight: 400;
  cursor: pointer;
  box-shadow: 0 12px 18px -8px var(--shadow-color);
  appearance: none;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="%233e8edd" stroke-width="2"><polyline points="6 9 12 15 18 9"/></svg>');
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 14px;
}

#citySelect option,
#baseCitySelect option {
  background: var(--option-bg);
  color: var(--text-primary);
}

.time-block {
  text-align: center;
  padding: 4px 10px 2px;
}

.time-label {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

#currentTime {
  font-size: 3.2rem;
  font-weight: 600;
  font-feature-settings: "tnum";
  letter-spacing: 2px;
  color: var(--text-primary);
  text-shadow: 0 0 18px var(--time-glow);
  line-height: 1.1;
  margin-bottom: 2px;
}

#currentDate {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--text-secondary);
  background: var(--distance-panel-bg);
  display: inline-block;
  padding: 2px 14px;
  border-radius: 40px;
  backdrop-filter: blur(6px);
  border: 1px solid var(--card-border);
  margin-bottom: 6px;
}

.distance-panel {
  background: var(--distance-panel-bg);
  border-radius: 24px;
  padding: 10px 14px;
  margin-top: 6px;
  border: 1px solid var(--card-border);
}

.distance-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.distance-title {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.9rem;
}

.mode-switch {
  display: flex;
  background: var(--select-bg);
  border-radius: 30px;
  padding: 2px;
}

.mode-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  padding: 3px 8px;
  border-radius: 30px;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: 0.2s;
}

.mode-btn.active {
  background: var(--btn-primary);
  color: white;
}

.base-city-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 6px;
}

.base-city-selector label {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.api-key-section {
  margin: 4px 0;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.api-key-section label {
  color: var(--text-secondary);
  font-size: 0.65rem;
}

#apiKeyInput {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 24px;
  padding: 2px 6px;
  color: var(--text-primary);
  width: 150px;
  font-family: monospace;
  font-size: 0.65rem;
}

#saveApiKeyBtn {
  background: var(--btn-primary);
  border: none;
  color: white;
  padding: 2px 8px;
  border-radius: 24px;
  font-weight: 500;
  font-size: 0.65rem;
  cursor: pointer;
}

.cost-input-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0;
  flex-wrap: wrap;
}

.cost-input-row label {
  color: var(--text-secondary);
  font-size: 0.7rem;
}

#costPerKm {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 20px;
  padding: 2px 6px;
  color: var(--text-primary);
  width: 80px;
  font-size: 0.7rem;
}

.distance-result {
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
  flex-wrap: wrap;
}

#distanceValue {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-color);
  text-shadow: 0 0 10px var(--time-glow);
}

#distanceDetails {
  color: var(--text-secondary);
  margin-left: 2px;
  font-size: 0.75rem;
}

#timeEstimate {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-left: 6px;
}

#costEstimate {
  color: #2ecc71;
  font-size: 0.8rem;
  margin-left: 6px;
}

#calcBtn {
  background: var(--btn-primary);
  border: none;
  color: white;
  padding: 4px 12px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.8rem;
  cursor: pointer;
  box-shadow: 0 4px 8px var(--shadow-color);
}

.meta-info {
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.65rem;
  border-top: 1px dashed var(--card-border);
  padding-top: 6px;
}

.city-count {
  background: var(--distance-panel-bg);
  padding: 2px 8px;
  border-radius: 24px;
  border: 1px solid var(--card-border);
}

.note {
  display: flex;
  gap: 4px;
  align-items: center;
}

.pulse-dot {
  width: 6px;
  height: 6px;
  background: #3ccf7c;
  border-radius: 50%;
  box-shadow: 0 0 8px #2ecc71;
  animation: pulse 1.8s infinite;
}

.faq-section {
  margin-top: 10px;
  background: var(--faq-bg);
  border-radius: 20px;
  padding: 10px 14px;
  border: 1px solid var(--card-border);
}

.faq-title {
  color: var(--accent-color);
  font-weight: 600;
  font-size: 0.8rem;
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
}

.faq-item {
  font-size: 0.6rem;
  color: var(--text-secondary);
}

.faq-item strong {
  color: var(--text-primary);
}

.seo-footer {
  margin-top: 8px;
  font-size: 0.5rem;
  color: var(--text-secondary);
  text-align: center;
  opacity: 0.7;
  line-height: 1.3;
}

/* Утроенный SEO-текст в стиле страницы */
.seo-extended {
  margin-top: 12px;
  padding: 12px 14px;
  background: var(--distance-panel-bg);
  border-radius: 20px;
  border: 1px solid var(--card-border);
  font-size: 0.6rem;
  color: var(--text-secondary);
  line-height: 1.5;
  backdrop-filter: blur(4px);
}

.seo-extended strong {
  color: var(--accent-color);
}

.counter-container {
  margin-top: 8px;
  text-align: center;
}

@keyframes pulse {
  0% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
  100% { opacity: 0.8; transform: scale(1); }
}

@media (max-height: 700px) {
  .glass-card { padding: 0.9rem 1.3rem; }
  #currentTime { font-size: 2.8rem; }
  .faq-section { padding: 6px 10px; }
}