:root {
  --bg: #f4f6fb;
  --bg-grad-1: #eef2ff;
  --bg-grad-2: #f6f4ff;
  --card: #ffffff;
  --ink: #16192b;
  --muted: #6b7180;
  --line: #e7e9f2;
  --field: #f8f9fc;
  --brand: #4f46e5;
  --brand-ink: #ffffff;
  --brand-soft: #eef0ff;
  --ok: #12885a;
  --ok-soft: #e6f6ee;
  --err: #d23b53;
  --err-soft: #fdecef;
  --shadow: 0 10px 40px rgba(30, 34, 70, 0.12);
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0e16;
    --bg-grad-1: #12152300;
    --bg-grad-2: #1a1636;
    --card: #161927;
    --ink: #eef0f6;
    --muted: #9aa0b4;
    --line: #272b3d;
    --field: #1d2130;
    --brand: #7c74ff;
    --brand-ink: #ffffff;
    --brand-soft: #23234a;
    --ok: #3ddc97;
    --ok-soft: #16311f;
    --err: #ff7a90;
    --err-soft: #351a22;
    --shadow: 0 14px 50px rgba(0, 0, 0, 0.5);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  font-family:
    -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 15% -10%, var(--bg-grad-1), transparent 60%),
    radial-gradient(1000px 700px at 110% 10%, var(--bg-grad-2), transparent 55%), var(--bg);
}

.layout {
  display: flex;
  gap: 22px;
  align-items: flex-start;
  justify-content: center;
  width: 100%;
  max-width: 920px;
}

.card {
  flex: 0 0 460px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
}

.script-panel {
  flex: 0 0 340px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  max-height: 84vh;
  overflow-y: auto;
  transition: flex-basis 0.18s ease;
}

/* Collapsed: a slim vertical tab */
.script-panel.collapsed {
  flex: 0 0 46px;
  padding: 0;
  background: transparent;
  border: none;
  box-shadow: none;
  overflow: visible;
  max-height: none;
}

.script-panel.collapsed .script-body {
  display: none;
}

.script-toggle {
  display: none;
}

.script-panel.collapsed .script-toggle {
  display: block;
  width: 46px;
  padding: 16px 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  cursor: pointer;
}

.script-panel.collapsed .script-toggle:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.script-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.script-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.script-collapse {
  border: 1px solid var(--line);
  background: var(--field);
  color: var(--muted);
  width: 28px;
  height: 28px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: grid;
  place-items: center;
  padding: 0;
}

.script-collapse:hover {
  color: var(--ink);
  border-color: var(--brand);
}

@media (max-width: 860px) {
  .layout {
    flex-direction: column;
    align-items: stretch;
    max-width: 460px;
  }
  .card {
    flex: none;
    width: 100%;
  }
  .script-panel {
    flex: none;
    max-height: 60vh;
    order: 2;
  }
  .script-panel.collapsed {
    flex: none;
    width: 100%;
  }
  .script-panel.collapsed .script-toggle {
    writing-mode: horizontal-tb;
    width: 100%;
    padding: 12px 16px;
    text-align: left;
  }
}

.head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dot {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--brand), #9b8bff);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

h1 {
  font-size: 17px;
  margin: 0;
  line-height: 1.1;
}

h2 {
  font-size: 20px;
  margin: 0 0 4px;
}

.sub {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.badge {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 9px;
  border-radius: 999px;
  background: #fff5d6;
  color: #8a6d00;
  border: 1px solid #f0e0a0;
}

@media (prefers-color-scheme: dark) {
  .badge {
    background: #3a3212;
    color: #ffd873;
    border-color: #574a1c;
  }
}

.muted {
  color: var(--muted);
}

.field {
  display: block;
  margin: 0 0 18px;
}

.label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 7px;
}

input {
  width: 100%;
  font-size: 16px;
  color: var(--ink);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 13px 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}

.amount-wrap {
  position: relative;
}

.amount-wrap .prefix {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--muted);
}

.amount-wrap input {
  padding-left: 30px;
  font-size: 22px;
  font-weight: 600;
}

.otp {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.otp-box {
  width: 100%;
  aspect-ratio: 1 / 1;
  padding: 0;
  text-align: center;
  font-size: 22px;
  font-weight: 700;
  caret-color: var(--brand);
}

.turnstile {
  margin: 0 0 16px;
}

.turnstile:empty {
  margin: 0;
}

.segmented {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 5px;
}

.seg {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 15px;
  font-weight: 600;
  padding: 10px;
  border-radius: 9px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.seg.active {
  background: var(--card);
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

.chips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.chip {
  border: 1px solid var(--line);
  background: var(--field);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.chip.active {
  border-color: var(--brand);
  background: var(--brand-soft);
  color: var(--brand);
}

.summary {
  min-height: 0;
  margin: -4px 0 18px;
}

.summary:not(:empty) {
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--brand-soft);
  border: 1px solid var(--line);
}

.summary .big {
  font-size: 18px;
  font-weight: 700;
}

.summary .row {
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 4px;
}

.summary .tag {
  display: inline-block;
  margin-top: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--card);
  border: 1px solid var(--line);
  color: var(--muted);
}

.confirm {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  margin: 0 0 18px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--field);
  cursor: pointer;
  font-size: 14px;
  line-height: 1.4;
  transition: border-color 0.15s;
}

.confirm:hover {
  border-color: var(--brand);
}

.confirm input[type='checkbox'] {
  appearance: auto;
  -webkit-appearance: auto;
  width: 18px;
  height: 18px;
  min-width: 18px;
  margin: 1px 0 0;
  padding: 0;
  border: 0;
  background: none;
  box-shadow: none;
  accent-color: var(--brand);
  cursor: pointer;
}

.btn {
  width: 100%;
  font-size: 16px;
  font-weight: 700;
  padding: 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.05s, opacity 0.15s, background 0.15s;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: var(--brand);
  color: var(--brand-ink);
}

.btn.primary:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--line);
  margin-top: 14px;
}

.error {
  color: var(--err);
  background: var(--err-soft);
  border: 1px solid transparent;
  font-size: 13.5px;
  padding: 10px 12px;
  border-radius: 10px;
  margin: 0 0 14px;
}

.pay-summary {
  font-size: 14px;
  color: var(--muted);
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  margin-bottom: 16px;
}

.pay-summary strong {
  color: var(--ink);
}

.result-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 6px auto 16px;
  display: grid;
  place-items: center;
  font-size: 32px;
}

.result-icon.ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.result-icon.err {
  background: var(--err-soft);
  color: var(--err);
}

.result-icon.pending {
  background: var(--brand-soft);
  color: var(--brand);
}

#step-result {
  text-align: center;
}

.result-detail {
  color: var(--muted);
  font-size: 14.5px;
  margin: 6px 0 22px;
  line-height: 1.5;
}

.result-detail strong {
  color: var(--ink);
}

.foot {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  text-align: center;
  font-size: 12px;
}

.hidden {
  display: none !important;
}

/* Rendered script markdown */
.markdown {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
}

.markdown > *:first-child {
  margin-top: 0;
}

.markdown h1,
.markdown h2,
.markdown h3,
.markdown h4 {
  line-height: 1.25;
  margin: 18px 0 8px;
}

.markdown h1 {
  font-size: 19px;
}

.markdown h2 {
  font-size: 16px;
}

.markdown h3 {
  font-size: 14.5px;
}

.markdown h4 {
  font-size: 12.5px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.markdown p {
  margin: 0 0 12px;
}

.markdown ul,
.markdown ol {
  margin: 0 0 12px;
  padding-left: 20px;
}

.markdown li {
  margin: 5px 0;
}

.markdown blockquote {
  margin: 0 0 12px;
  padding: 10px 14px;
  border-left: 3px solid var(--brand);
  background: var(--field);
  border-radius: 0 8px 8px 0;
}

.markdown hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 18px 0;
}

.markdown a {
  color: var(--brand);
}

.markdown strong {
  color: var(--ink);
  font-weight: 700;
}

.markdown code {
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 0.9em;
}

.markdown pre {
  background: var(--field);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
  overflow-x: auto;
  margin: 0 0 12px;
}

.markdown pre code {
  border: 0;
  background: none;
  padding: 0;
}