:root {
  --bg: #06080f;
  --text: #e0e8f0;
  --muted: #8b95a5;
  --line: rgba(224, 232, 240, 0.1);
  --accent: #00e5ff;
  --accent-soft: rgba(0, 229, 255, 0.16);
  --indigo-soft: rgba(99, 102, 241, 0.22);
  --warning: #ffba7a;
  --warning-soft: rgba(255, 186, 122, 0.12);
  --sans: "Kanit", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100svh;
  position: relative;
}

.atmosphere {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 42% at 88% -8%, var(--accent-soft), transparent 58%),
    radial-gradient(ellipse 45% 36% at 8% 108%, var(--indigo-soft), transparent 62%);
}

.masthead {
  position: relative;
  padding: 1.5rem 1.5rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin: 0;
}

.brand-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.brand-name {
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: lowercase;
}

.brand-name span {
  color: var(--accent);
}

#page {
  position: relative;
  width: min(72rem, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 2.5rem 0 4.5rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.85rem, 4vw, 2.7rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

h1:focus {
  outline: none;
}

.lede,
.note,
.product-desc {
  margin: 0;
  max-width: 32rem;
  color: var(--muted);
  font-size: 1.02rem;
  font-weight: 400;
  line-height: 1.55;
}

.note {
  margin-top: 1.75rem;
  font-size: 0.88rem;
  line-height: 1.5;
}

section[hidden] {
  display: none;
}

.standalone-state {
  padding: 8vh 0 12vh;
  animation: rise 480ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.closing-state {
  min-height: min(38rem, calc(100svh - 10rem));
  display: grid;
  align-content: center;
  justify-items: start;
  max-width: 38rem;
}

.closing-state[hidden] {
  display: none;
}

.status-mark {
  width: 4.2rem;
  height: 4.2rem;
  position: relative;
  margin-bottom: 2.25rem;
  border: 1px solid rgba(0, 229, 255, 0.4);
  border-radius: 50%;
  color: var(--accent);
  box-shadow:
    0 0 0 0.7rem rgba(0, 229, 255, 0.04),
    0 0 3rem rgba(0, 229, 255, 0.12);
  animation: mark-in 520ms 120ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.status-mark-success::after {
  content: "";
  position: absolute;
  width: 1.25rem;
  height: 0.68rem;
  left: 1.35rem;
  top: 1.4rem;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
}

.status-mark-pending::before,
.status-mark-pending::after {
  content: "";
  position: absolute;
  inset: 50% auto auto 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.status-mark-pending::before {
  width: 0.7rem;
  height: 0.7rem;
  background: currentColor;
  box-shadow: 0 0 1.2rem currentColor;
}

.status-mark-pending::after {
  width: 1.9rem;
  height: 1.9rem;
  border: 1px solid currentColor;
  animation: status-pulse 1.8s ease-out infinite;
}

.status-mark-failed {
  color: var(--warning);
  border-color: rgba(255, 186, 122, 0.42);
  box-shadow:
    0 0 0 0.7rem rgba(255, 186, 122, 0.04),
    0 0 3rem rgba(255, 186, 122, 0.1);
}

.status-mark-failed::before,
.status-mark-failed::after {
  content: "";
  position: absolute;
  width: 1.45rem;
  height: 2px;
  left: 1.32rem;
  top: 2rem;
  background: currentColor;
}

.status-mark-failed::before {
  transform: rotate(45deg);
}

.status-mark-failed::after {
  transform: rotate(-45deg);
}

.closing-summary {
  margin: 1.65rem 0 0;
  color: var(--text);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.return-action {
  min-height: 2.85rem;
  margin-top: 2rem;
  padding: 0.72rem 1.15rem;
  border: 1px solid var(--accent);
  border-radius: 0.3rem;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition:
    background-color 160ms ease,
    color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.return-action:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 1.5rem rgba(0, 229, 255, 0.12);
  transform: translateY(-1px);
}

.return-action:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
}

.return-action-secondary {
  background: transparent;
  color: var(--accent);
}

.return-action-secondary:hover {
  background: var(--accent);
  color: var(--bg);
}

.return-fallback {
  margin: 1rem 0 0;
  max-width: 31rem;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

#state-checkout {
  animation: rise 480ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.checkout-layout {
  display: grid;
  gap: 2.5rem;
}

.order {
  min-width: 0;
}

.product-hero {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.85rem;
}

.product-hero h1 {
  margin: 0;
}

#product-image {
  width: 4.25rem;
  height: 4.25rem;
  flex-shrink: 0;
  object-fit: cover;
  border-radius: 0.4rem;
}

.product-desc {
  margin-bottom: 1.5rem;
}

.lines {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.35rem 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.line-name {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.line-meta {
  grid-column: 1;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}

.line-amount {
  grid-row: 1 / span 2;
  align-self: center;
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.totals {
  margin: 0.35rem 0 0;
  display: grid;
  gap: 0.65rem;
}

.totals > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.totals dt {
  font-weight: 400;
}

.totals dd {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.88rem;
  color: var(--text);
}

.totals .grand {
  margin-top: 0.45rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
  color: var(--text);
  font-size: 1.02rem;
}

.totals .grand dt {
  font-weight: 500;
}

.totals .grand dd {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
}

.pay {
  min-width: 0;
  position: relative;
}

.payment-alert {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.7rem;
  align-items: start;
  margin: 0 0 1.15rem;
  padding: 0.8rem 0 0.8rem 0.9rem;
  border-left: 2px solid var(--warning);
  background: linear-gradient(90deg, var(--warning-soft), transparent 82%);
  color: var(--warning);
  animation: alert-in 240ms ease-out both;
}

.payment-alert[hidden] {
  display: none;
}

.payment-alert-mark {
  display: grid;
  place-items: center;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.08rem;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
}

.payment-alert p {
  margin: 0;
  color: var(--text);
  font-size: 0.9rem;
  line-height: 1.45;
}

.pay-label {
  margin: 0 0 0.85rem;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--muted);
}

.checkout-container {
  min-height: 28rem;
}

.pay .pulse {
  position: absolute;
  top: 0;
  right: 0;
}

.pulse {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 var(--accent-soft);
  animation: pulse 1.6s ease-out infinite;
}

body.is-loaded .pay .pulse {
  display: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 var(--accent-soft);
  }
  70% {
    box-shadow: 0 0 0 12px transparent;
  }
  100% {
    box-shadow: 0 0 0 0 transparent;
  }
}

@keyframes mark-in {
  from {
    opacity: 0;
    transform: scale(0.82) rotate(-8deg);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes status-pulse {
  0% {
    opacity: 0.75;
    transform: translate(-50%, -50%) scale(0.7);
  }
  70%,
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.5);
  }
}

@keyframes alert-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 860px) {
  .masthead {
    padding: 2rem 2.5rem 0;
  }

  #page {
    width: min(72rem, calc(100% - 5rem));
    padding-top: 3.25rem;
  }

  .checkout-layout {
    grid-template-columns: minmax(16rem, 0.92fr) minmax(20rem, 1.08fr);
    gap: 4rem;
    align-items: start;
  }

  .pay {
    padding-left: 4rem;
    border-left: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .standalone-state,
  #state-checkout,
  .status-mark,
  .status-mark-pending::after,
  .payment-alert,
  .pulse {
    animation: none;
  }

  .return-action {
    transition: none;
  }
}