/* ===== Переменные: светлая тема (по умолчанию) ===== */
:root {
  --bg: #f2f4f7;
  --surface: #ffffff;
  --surface-hover: #f8f9fc;
  --text-primary: #121826;
  --text-secondary: #5a6170;
  --accent: #2d6ee0;
  --accent-light: #e9efff;
  --border: #dce1e8;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.06);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --transition: 0.2s ease;
  --font-mono: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ===== Тёмная тема ===== */
body.dark {
  --bg: #0f1119;
  --surface: #1b1e28;
  --surface-hover: #242836;
  --text-primary: #edf0f5;
  --text-secondary: #9aa1b0;
  --accent: #4d8af0;
  --accent-light: #1e2b48;
  --border: #2a2f3d;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.4);
}

/* ===== Базовые стили ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-mono);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-tap-highlight-color: transparent;
  transition: background var(--transition), color var(--transition);
  padding: env(safe-area-inset-top) 0 env(safe-area-inset-bottom) 0;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 16px 24px 16px;
}

/* ===== App Bar (шапка как в приложении) ===== */
.app-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--surface);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  margin: 0 -16px 20px -16px;   /* растягиваем на всю ширину контейнера */
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), border var(--transition);
}

.app-bar h1 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.4rem;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--transition);
}
.icon-btn:active {
  background: var(--accent-light);
}

/* ===== Карточки (основной элемент дизайна) ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition);
  border: 1px solid var(--border);
}

.card:active {
  transform: scale(0.995);
}

/* ===== Калькулятор ===== */
.calculator .calc-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 12px;
}

.calc-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.calc-row label {
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.select-wrapper {
  position: relative;
  width: 100%;
}

select {
  width: 100%;
  padding: 14px 40px 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: background var(--transition), border var(--transition);
}

.select-wrapper::after {
  content: "▾";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

input[type="number"] {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
  transition: background var(--transition), border var(--transition);
}

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

.calc-result {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  background: var(--accent-light);
  padding: 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1.2rem;
}

#total-price {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
}

.calc-note {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 8px;
  text-align: right;
}

/* ===== Аккордеоны (список услуг) ===== */
.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  padding-left: 4px;
  color: var(--text-primary);
}

details.service-group {
  background: var(--surface);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: background var(--transition);
}

details.service-group summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 1rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

details.service-group summary::after {
  content: "▸";
  font-size: 1.2rem;
  transition: transform 0.2s;
  color: var(--text-secondary);
}

details.service-group[open] summary::after {
  transform: rotate(90deg);
}

.details-content {
  padding: 0 20px 20px 20px;
  animation: slideDown 0.25s ease;
}

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

.zone-cards {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.zone-card {
  background: var(--bg);
  padding: 14px;
  border-radius: var(--radius-sm);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
}

.zone-card .price {
  font-weight: 700;
  color: var(--accent);
  font-size: 1.1rem;
}

.service-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  padding: 14px;
  margin-bottom: 8px;
  border-left: 3px solid var(--accent);
}

.service-item h4 {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.service-item p, .service-item li {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.min-order {
  color: #e04b4b !important;
  font-weight: 600;
}

/* ===== Нижняя навигация (как в приложении) ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-around;
  padding: 10px 0 env(safe-area-inset-bottom, 0) 0;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.7rem;
  text-decoration: none;
  gap: 4px;
  padding: 6px 12px;
  border-radius: 12px;
  transition: color var(--transition);
}

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

.nav-item span:first-child {
  font-size: 1.3rem;
}

/* ===== Утилиты ===== */
.footer-link {
  text-align: center;
  margin: 20px 0 80px 0;  /* отступ под нижнюю панель */
  color: var(--text-secondary);
  font-size: 0.85rem;
}
.footer-link a {
  color: var(--accent);
  text-decoration: none;
}

/* ===== Адаптация для очень узких экранов ===== */
@media (max-width: 380px) {
  .container {
    padding: 0 12px 24px 12px;
  }
  .app-bar {
    padding: 12px 12px;
  }
}