:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #121a2f;
  --panel-2: #18233e;
  --line: rgba(167, 184, 255, 0.16);
  --text: #f6f8ff;
  --muted: #9da8c7;
  --primary: #65d6c7;
  --primary-2: #8ee8df;
  --accent: #8f7cff;
  --accent-2: #c8c0ff;
  --shadow: rgba(0, 0, 0, 0.24);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 4%, rgba(101, 214, 199, 0.2), transparent 28%),
    radial-gradient(circle at 94% 0%, rgba(143, 124, 255, 0.18), transparent 30%),
    linear-gradient(180deg, #10172b 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Tahoma, Arial, sans-serif;
}

button {
  font: inherit;
}

.app {
  width: min(100%, 560px);
  margin: 0 auto;
  padding: 12px 12px 92px;
}

.hero {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 14px;
  background: linear-gradient(145deg, rgba(24, 35, 62, 0.84), rgba(13, 19, 36, 0.92));
  box-shadow: 0 10px 24px var(--shadow);
}

.brand {
  margin: 0 0 8px;
  color: var(--primary-2);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(24px, 6.2vw, 36px);
  line-height: 1.35;
  letter-spacing: 0;
}

.subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.tabs {
  display: grid;
  grid-template-columns: 1fr;
  margin: 12px 0;
}

.tab {
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(18, 26, 47, 0.86);
  color: var(--text);
  font-size: 15px;
  font-weight: 800;
}

.tab.active {
  background: linear-gradient(135deg, rgba(101, 214, 199, 0.9), rgba(143, 124, 255, 0.9));
  color: #08111e;
  border-color: rgba(200, 192, 255, 0.44);
}

.products {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.product {
  display: grid;
  align-content: center;
  gap: 5px;
  min-height: 82px;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(18, 26, 47, 0.86);
  color: var(--text);
  text-align: center;
  box-shadow: 0 6px 14px var(--shadow);
}

.product[hidden] {
  display: none;
}

.product.selected {
  border-color: rgba(101, 214, 199, 0.78);
  background: rgba(28, 42, 70, 0.94);
  box-shadow: 0 0 0 1px rgba(101, 214, 199, 0.2), 0 6px 14px var(--shadow);
}

.icon {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  margin: 0 auto;
  border: 1px solid rgba(200, 192, 255, 0.18);
  border-radius: 8px;
  background: rgba(143, 124, 255, 0.12);
  font-size: 14px;
}

.title {
  font-size: 14px;
  font-weight: 900;
  line-height: 1.35;
}

.price {
  color: var(--primary-2);
  font-size: 11px;
  font-weight: 800;
  line-height: 1.35;
}

.volume-panel {
  display: grid;
  gap: 8px;
  margin: 12px 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(24, 35, 62, 0.74);
}

.volume-panel[hidden] {
  display: none;
}

.volume-panel label {
  color: var(--text);
  font-size: 15px;
  font-weight: 900;
}

.volume-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.volume-control {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  gap: 8px;
  align-items: center;
}

.volume-control input,
.volume-control .step {
  min-height: 44px;
  border: 1px solid rgba(167, 184, 255, 0.2);
  border-radius: 12px;
  background: rgba(10, 16, 32, 0.78);
  color: var(--text);
  text-align: center;
  font-size: 18px;
  font-weight: 900;
}

.volume-control .step {
  background: rgba(143, 124, 255, 0.16);
  color: var(--accent-2);
}

.summary {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 13px;
}

.summary strong {
  color: var(--text);
  font-size: 14px;
}

.action-bar {
  position: fixed;
  right: 0;
  bottom: 0;
  left: 0;
  padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
  background: linear-gradient(180deg, rgba(11, 16, 32, 0), rgba(11, 16, 32, 0.96) 24%);
}

#submit-order {
  display: block;
  width: min(100%, 536px);
  min-height: 54px;
  margin: 0 auto;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #08111e;
  font-size: 20px;
  font-weight: 950;
  box-shadow: 0 10px 22px rgba(101, 214, 199, 0.16);
}