:root {
  --bg: #f4f7f8;
  --surface: #ffffff;
  --surface-soft: #f8fafb;
  --text: #172329;
  --muted: #6b7a80;
  --border: #dfe7e9;
  --accent: #0f766e;
  --accent-dark: #0b5f59;
  --accent-soft: #e6f4f2;
  --danger: #b42318;
  --danger-soft: #fff0ee;
  --shadow: 0 8px 30px rgba(25, 45, 52, .07);
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  padding-bottom: 126px;
}

button, input { font: inherit; }
button { cursor: pointer; }

.app-shell {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding: 34px 0 26px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .14em;
}

h1, h2, p { margin-top: 0; }

h1 {
  margin-bottom: 7px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.05;
  letter-spacing: -.035em;
}

.subtitle {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.5;
}

.header-clear {
  flex: 0 0 auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  padding: 11px 16px;
  font-weight: 700;
  transition: .18s ease;
}

.header-clear:hover { border-color: #c6d3d6; transform: translateY(-1px); }

.money-section { margin-bottom: 28px; }

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.section-heading h2 {
  margin-bottom: 3px;
  font-size: 22px;
  letter-spacing: -.02em;
}

.section-meta { color: var(--muted); font-size: 13px; }

.money-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.money-card {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 150px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.money-card:focus-within,
.money-card:hover {
  border-color: #bdd7d4;
  box-shadow: 0 12px 34px rgba(25, 45, 52, .1);
  transform: translateY(-1px);
}

.money-card.coin-card { grid-template-columns: 86px minmax(0, 1fr); }

.money-image-wrap {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--surface-soft);
  overflow: hidden;
}

.money-card.coin-card .money-image-wrap { height: 86px; }

.money-image {
  max-width: 92%;
  max-height: 92%;
  object-fit: contain;
  display: block;
}

.money-details { min-width: 0; }

.denomination {
  margin-bottom: 2px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -.02em;
}

.unit-label {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 10px;
}

.quantity-control {
  display: grid;
  grid-template-columns: 42px minmax(46px, 1fr) 42px;
  gap: 6px;
  align-items: center;
  max-width: 210px;
}

.step-button {
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font-size: 25px;
  line-height: 1;
  font-weight: 500;
  transition: .15s ease;
}

.step-button:hover { border-color: #b9cccf; background: var(--surface-soft); }
.step-button:active { transform: scale(.96); }
.step-button.minus:hover { color: var(--danger); background: var(--danger-soft); }
.step-button.plus:hover { color: var(--accent-dark); background: var(--accent-soft); }

.quantity-input {
  width: 100%;
  min-width: 0;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-soft);
  color: var(--text);
  text-align: center;
  font-size: 17px;
  font-weight: 800;
  outline: none;
  appearance: textfield;
  -moz-appearance: textfield;
}

.quantity-input::-webkit-outer-spin-button,
.quantity-input::-webkit-inner-spin-button { appearance: none; margin: 0; }
.quantity-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(15,118,110,.12); }

.line-total {
  margin-top: 8px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 750;
  min-height: 18px;
}

.total-bar {
  position: fixed;
  z-index: 20;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid rgba(207, 220, 223, .95);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(14px);
  box-shadow: 0 -10px 35px rgba(25, 45, 52, .08);
}

.total-inner {
  width: min(1240px, 100%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.total-info {
  display: grid;
  grid-template-columns: auto auto;
  column-gap: 12px;
  align-items: baseline;
}

.total-label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: .08em;
}

#totalAmount {
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: -.035em;
}

.total-pieces {
  grid-column: 2;
  color: var(--muted);
  font-size: 12px;
}

.clear-button {
  flex: 0 0 auto;
  min-width: 128px;
  height: 46px;
  padding: 0 18px;
  border: 0;
  border-radius: 13px;
  background: var(--accent);
  color: #fff;
  font-weight: 800;
  transition: .18s ease;
}

.clear-button:hover { background: var(--accent-dark); transform: translateY(-1px); }
.clear-button:active { transform: translateY(0); }

.toast {
  position: fixed;
  z-index: 30;
  left: 50%;
  bottom: 92px;
  transform: translate(-50%, 12px);
  padding: 10px 14px;
  border-radius: 10px;
  background: #172329;
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
}

.toast.show { opacity: 1; transform: translate(-50%, 0); }

@media (max-width: 980px) {
  .money-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 680px) {
  body { padding-bottom: 112px; }
  .app-shell { width: min(100% - 20px, 620px); }
  .app-header { padding: 22px 0 18px; align-items: center; }
  .header-clear { padding: 9px 12px; font-size: 13px; }
  .subtitle { font-size: 13px; }
  .money-grid { grid-template-columns: 1fr; gap: 10px; }
  .money-card { grid-template-columns: 88px minmax(0, 1fr); min-height: 140px; }
  .money-card.coin-card { grid-template-columns: 82px minmax(0, 1fr); }
  .total-inner { gap: 10px; }
  .total-info { column-gap: 8px; }
  .clear-button { min-width: 105px; height: 44px; padding: 0 12px; }
}

@media (max-width: 430px) {
  .app-header { gap: 12px; }
  h1 { font-size: 27px; }
  .eyebrow { font-size: 10px; }
  .header-clear { font-size: 12px; }
  .money-card { grid-template-columns: 76px minmax(0, 1fr); gap: 10px; padding: 10px; }
  .money-card.coin-card { grid-template-columns: 72px minmax(0, 1fr); }
  .money-image-wrap { height: 68px; }
  .money-card.coin-card .money-image-wrap { height: 72px; }
  .denomination { font-size: 16px; }
  .quantity-control { grid-template-columns: 38px minmax(44px, 1fr) 38px; }
  .step-button { width: 38px; height: 38px; }
  .quantity-input { height: 38px; font-size: 16px; }
  #totalAmount { font-size: 23px; }
  .total-label { font-size: 11px; }
  .total-pieces { font-size: 10px; }
}

.kbd-green { color: green; }
.kbd-red { color: red; }


/* Основная навигация */
.site-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  padding: 16px 0 0;
}

.site-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  transition: .18s ease;
}

.site-nav-link:hover {
  border-color: #b9cccf;
  background: var(--surface-soft);
  transform: translateY(-1px);
}

.site-nav-link.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

@media (max-width: 640px) {
  .site-nav {
    display: grid;
    grid-template-columns: 1fr;
  }

  .site-nav-link {
    justify-content: center;
  }
}