:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #eef4ff;
  --text: #101522;
  --muted: #657084;
  --line: #dde5f1;
  --primary: #08b6a1;
  --primary-dark: #078677;
  --accent: #ff5a87;
  --warning: #f6a700;
  --shadow: 0 14px 34px rgba(33, 45, 72, 0.12);
  --radius: 8px;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  min-height: 100vh;
  padding-bottom: 82px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 12px clamp(14px, 4vw, 32px);
  background: rgba(246, 248, 251, 0.92);
  border-bottom: 1px solid rgba(221, 229, 241, 0.8);
  backdrop-filter: blur(16px);
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius);
  background: #101522;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

.icon-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
}

.icon-button.ghost {
  border: 0;
  background: transparent;
}

.badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: white;
  font-size: 12px;
  font-weight: 800;
}

.search-wrap {
  min-width: 0;
  position: relative;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 20px;
}

.search-wrap input {
  width: 100%;
  height: 44px;
  padding: 0 14px 0 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  outline: none;
}

.search-wrap input:focus,
.field input:focus,
.field select:focus,
select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8, 182, 161, 0.16);
}

main {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 16px clamp(14px, 4vw, 32px) 28px;
}

.view {
  display: none;
}

.active-view {
  display: block;
}

.hero {
  display: grid;
  grid-template-columns: 1.7fr 0.8fr;
  gap: 18px;
  min-height: 300px;
  padding: clamp(22px, 5vw, 44px);
  border-radius: 12px;
  background:
    linear-gradient(130deg, rgba(16, 21, 34, 0.88), rgba(11, 43, 51, 0.78)),
    url("https://images.unsplash.com/photo-1516321318423-f06f85e504b3?auto=format&fit=crop&w=1600&q=80") center/cover;
  color: white;
  overflow: hidden;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 720px;
  font-size: clamp(36px, 7vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero p:not(.eyebrow) {
  max-width: 540px;
  margin: 16px 0 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 16px;
  line-height: 1.55;
}

.hero-panel {
  align-self: end;
  min-height: 154px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.26);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  justify-content: end;
}

.hero-panel span,
.hero-panel small {
  color: rgba(255, 255, 255, 0.72);
}

.hero-panel strong {
  display: block;
  margin: 6px 0;
  font-size: clamp(28px, 5vw, 44px);
  letter-spacing: 0;
}

.primary-button,
.secondary-button,
.text-button {
  border-radius: var(--radius);
  min-height: 44px;
  padding: 0 16px;
  font-weight: 800;
}

.primary-button {
  width: fit-content;
  border: 0;
  background: var(--primary);
  color: #042522;
  box-shadow: 0 12px 22px rgba(8, 182, 161, 0.24);
}

.primary-button:hover {
  background: #20cab6;
}

.primary-button.full {
  width: 100%;
}

.secondary-button {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
}

.text-button {
  border: 0;
  background: transparent;
  color: var(--primary-dark);
  padding-inline: 0;
}

.notice {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 16px 0;
  padding: 12px 14px;
  border: 1px solid #f3d587;
  border-radius: var(--radius);
  background: #fff8e5;
  color: #5f4500;
  line-height: 1.4;
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin: 24px 0 14px;
}

.section-head.compact {
  align-items: center;
  margin-top: 8px;
}

.section-head h2,
.panel h2,
.success-card h2 {
  margin: 0;
  font-size: clamp(24px, 4vw, 34px);
  letter-spacing: 0;
}

select,
.field input,
.field select {
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 0 12px;
  outline: none;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.product-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  box-shadow: 0 8px 18px rgba(33, 45, 72, 0.06);
}

.product-card button.image-button {
  width: 100%;
  padding: 0;
  border: 0;
  background: transparent;
  text-align: left;
}

.image-frame {
  position: relative;
  aspect-ratio: 1 / 0.82;
  background: var(--surface-2);
  overflow: hidden;
}

.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.watermark {
  position: absolute;
  left: 8px;
  bottom: 8px;
  padding: 5px 7px;
  border-radius: 6px;
  background: rgba(16, 21, 34, 0.78);
  color: white;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
}

.product-body {
  padding: 12px;
}

.product-title {
  min-height: 42px;
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.35;
}

.rating {
  color: #9f6b00;
  font-size: 13px;
}

.price-row {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.price {
  font-size: 18px;
  font-weight: 900;
}

.price small {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.mini-button {
  min-width: 44px;
  height: 38px;
  border: 0;
  border-radius: var(--radius);
  background: #101522;
  color: white;
  font-weight: 900;
}

.detail {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 20px;
  margin-top: 8px;
}

.detail-media {
  position: sticky;
  top: 82px;
  align-self: start;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
}

.detail-media .image-frame {
  aspect-ratio: 1 / 0.92;
}

.detail-info {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: clamp(16px, 4vw, 24px);
}

.detail-info h2 {
  margin: 0 0 10px;
  font-size: clamp(26px, 4vw, 44px);
  line-height: 1.06;
  letter-spacing: 0;
}

.detail-price {
  margin: 16px 0;
  padding: 14px;
  border-radius: var(--radius);
  background: var(--surface-2);
}

.detail-price strong {
  display: block;
  font-size: 32px;
}

.option-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 8px 0 16px;
}

.option {
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 0 12px;
}

.option.selected {
  border-color: var(--primary);
  background: rgba(8, 182, 161, 0.12);
}

.bullets {
  padding-left: 18px;
  color: #30394a;
  line-height: 1.55;
}

.cart-list,
.ledger,
.tracking {
  display: grid;
  gap: 12px;
}

.cart-item,
.ledger-item,
.timeline-item,
.panel,
.wallet-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 18px rgba(33, 45, 72, 0.05);
}

.cart-item {
  display: grid;
  grid-template-columns: 94px 1fr auto;
  gap: 14px;
  padding: 12px;
  align-items: center;
}

.cart-item img {
  width: 94px;
  height: 84px;
  object-fit: cover;
  border-radius: var(--radius);
}

.cart-item h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.cart-item p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.qty {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 10px;
}

.qty button {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-2);
}

.cart-total {
  margin-top: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.total-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
}

.total-row:last-child {
  border-bottom: 0;
  font-weight: 900;
}

.checkout-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 16px;
}

.panel {
  padding: clamp(16px, 4vw, 24px);
}

.field {
  display: grid;
  gap: 8px;
  margin-top: 16px;
  color: var(--muted);
  font-weight: 700;
}

.field input,
.field select {
  width: 100%;
  color: var(--text);
}

.check-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  align-items: start;
  margin: 18px 0;
  color: #30394a;
  line-height: 1.45;
}

.summary-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.summary-line:last-child {
  border-bottom: 0;
  font-weight: 900;
}

.success-card {
  position: relative;
  max-width: 720px;
  margin: 40px auto;
  padding: clamp(24px, 6vw, 48px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  text-align: center;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.success-card p:not(.eyebrow) {
  color: var(--muted);
  line-height: 1.5;
}

.success-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.confetti {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 18% 20%, var(--primary) 0 4px, transparent 5px),
    radial-gradient(circle at 76% 18%, var(--accent) 0 5px, transparent 6px),
    radial-gradient(circle at 62% 72%, var(--warning) 0 4px, transparent 5px),
    radial-gradient(circle at 28% 78%, #6f7cff 0 4px, transparent 5px);
  animation: floaty 2s ease-in-out infinite alternate;
  opacity: 0.55;
}

@keyframes floaty {
  to {
    transform: translateY(10px);
  }
}

.timeline-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 14px;
}

.timeline-dot {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border-radius: 999px;
  border: 3px solid var(--line);
  background: var(--surface);
}

.timeline-item.done .timeline-dot {
  border-color: var(--primary);
  background: var(--primary);
}

.timeline-item h3 {
  margin: 0 0 4px;
  font-size: 16px;
}

.timeline-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.wallet-card {
  padding: 22px;
  margin-bottom: 14px;
  background:
    linear-gradient(135deg, rgba(8, 182, 161, 0.18), rgba(255, 90, 135, 0.12)),
    var(--surface);
}

.wallet-card span,
.wallet-card small {
  display: block;
  color: var(--muted);
}

.wallet-card strong {
  display: block;
  margin: 4px 0;
  font-size: clamp(38px, 8vw, 62px);
  letter-spacing: 0;
}

.ledger-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px;
}

.ledger-item p {
  margin: 0;
  color: var(--muted);
}

.ledger-item strong.positive {
  color: var(--primary-dark);
}

.ledger-item strong.negative {
  color: var(--accent);
}

.bottom-nav {
  position: fixed;
  left: 50%;
  bottom: 12px;
  z-index: 30;
  width: min(520px, calc(100% - 24px));
  transform: translateX(-50%);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 8px;
  border: 1px solid rgba(221, 229, 241, 0.88);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.nav-item {
  min-width: 0;
  height: 52px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.nav-item span {
  display: block;
  margin-bottom: 2px;
  font-size: 17px;
}

.nav-item.active {
  background: rgba(8, 182, 161, 0.13);
  color: var(--primary-dark);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 86px;
  z-index: 60;
  width: min(420px, calc(100% - 28px));
  transform: translate(-50%, 16px);
  padding: 12px 14px;
  border-radius: var(--radius);
  background: #101522;
  color: white;
  opacity: 0;
  pointer-events: none;
  transition: 0.2s ease;
}

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

.empty {
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
  color: var(--muted);
}

@media (max-width: 840px) {
  .hero,
  .detail,
  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .detail-media {
    position: static;
  }

  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .topbar {
    grid-template-columns: auto 1fr auto;
    padding-inline: 10px;
  }

  main {
    padding-inline: 10px;
  }

  .hero {
    min-height: 420px;
    padding: 22px;
  }

  .hero h1 {
    font-size: 44px;
  }

  .section-head {
    align-items: stretch;
    flex-direction: column;
  }

  .product-grid {
    gap: 10px;
  }

  .product-body {
    padding: 10px;
  }

  .product-title {
    font-size: 14px;
  }

  .cart-item {
    grid-template-columns: 78px 1fr;
  }

  .cart-item img {
    width: 78px;
    height: 78px;
  }

  .cart-line-price {
    grid-column: 1 / -1;
  }

  .success-actions {
    display: grid;
  }

  .success-actions .primary-button,
  .success-actions .secondary-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}