/* ===========================================================================
   Pi 支付示例 · 样式
   移动端优先（Pi Browser 主要在手机上），浅色主题，主色 Pi 紫。
   =========================================================================== */
:root {
  --pi: #7d4698;
  --pi-dark: #5f3475;
  --pi-soft: #f3ecf7;
  --ink: #1c1a1f;
  --ink-2: #4b4653;
  --ink-3: #8a8492;
  --line: #e6e2ea;
  --bg: #f7f5f9;
  --card: #ffffff;
  --ok: #12805c;
  --ok-bg: #e6f6ef;
  --warn: #8a5a00;
  --warn-bg: #fdf3e0;
  --err: #b3261e;
  --err-bg: #fdeceb;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(28, 26, 31, 0.04), 0 8px 24px rgba(28, 26, 31, 0.05);
}

* { box-sizing: border-box; }

/* 作者样式里的 display 会盖掉浏览器默认的 [hidden]{display:none}，
   凡是靠 hidden 属性隐藏的元素都必须显式压回去，否则会出现空横幅。 */
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  padding-bottom: 32px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.86em;
  background: var(--pi-soft);
  color: var(--pi-dark);
  padding: 1px 5px;
  border-radius: 5px;
  word-break: break-all;
}

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px 14px;
  background: linear-gradient(135deg, var(--pi) 0%, #9a5fb4 100%);
  color: #fff;
}
.topbar__main { display: flex; align-items: center; gap: 12px; min-width: 0; }
.logo {
  width: 40px; height: 40px;
  flex: 0 0 40px;
  display: grid; place-items: center;
  border-radius: 12px;
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.28);
  font-size: 22px; font-weight: 600;
}
.topbar h1 { margin: 0; font-size: 17px; font-weight: 600; letter-spacing: 0.2px; }
.topbar .sub { margin: 1px 0 0; font-size: 12px; opacity: 0.82; }

.badge {
  flex: 0 0 auto;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.18);
  color: #fff;
  white-space: nowrap;
}
.badge--muted { opacity: 0.75; }

/* ---------- 提示条 ---------- */
.banner {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin: 14px 16px 0;
  padding: 11px 13px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.55;
  border: 1px solid transparent;
}
.banner strong { flex: 0 0 auto; }
.banner--warn { background: var(--warn-bg); color: var(--warn); border-color: #f0dcb4; }
.banner--error { background: var(--err-bg); color: var(--err); border-color: #f5cdc9; }

/* ---------- 卡片 ---------- */
main { padding: 14px 16px 0; display: flex; flex-direction: column; gap: 14px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
}
.card__head { display: flex; align-items: center; gap: 9px; margin-bottom: 8px; }
.card__head h2 { margin: 0; font-size: 15px; font-weight: 600; flex: 1; }
.step {
  width: 22px; height: 22px;
  flex: 0 0 22px;
  display: grid; place-items: center;
  border-radius: 7px;
  background: var(--pi-soft);
  color: var(--pi-dark);
  font-size: 12px;
  font-weight: 700;
}
.step--log { background: #eef1f6; color: #4b5a70; }

.hint {
  margin: 0 0 12px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--ink-3);
}

/* ---------- 按钮 ---------- */
.row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s, transform 0.06s;
}
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn--primary { background: var(--pi); color: #fff; }
.btn--primary:not(:disabled):hover { background: var(--pi-dark); }

.btn--ghost {
  background: #fff;
  color: var(--ink-2);
  border-color: var(--line);
}
.btn--ghost:not(:disabled):hover { background: #faf9fb; border-color: #d8d2de; }

.btn--mini { padding: 4px 10px; font-size: 12px; border-radius: 8px; font-weight: 500; }

.btn--pay { width: 100%; justify-content: center; }

/* ---------- 状态点 ---------- */
.state { font-size: 13px; font-weight: 500; }
.state--idle { color: var(--ink-3); }
.state--ok { color: var(--ok); }
.state--busy { color: var(--pi); }
.state--err { color: var(--err); }

/* ---------- 表单内错误（登录失败原因直接摊开，不藏在日志里）---------- */
.form-error {
  margin: 10px 0 0;
  padding: 9px 11px;
  border-radius: 9px;
  border: 1px solid #f5cdc9;
  background: var(--err-bg);
  color: var(--err);
  font-size: 12.5px;
  line-height: 1.6;
  word-break: break-word;
}

/* ---------- 用户信息 ---------- */
.kv {
  margin: 12px 0 0;
  padding: 11px 12px;
  background: #fbfafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 12.5px;
}
.kv > div { display: flex; gap: 10px; }
.kv dt { flex: 0 0 96px; color: var(--ink-3); margin: 0; }
.kv dd {
  margin: 0;
  color: var(--ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  word-break: break-all;
}
/* 钱包地址比 uid 长得多，留一行的余量并允许换行，避免把卡片撑破 */
.kv__wallet dd { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; }
.wallet { font-size: 11.5px; line-height: 1.5; letter-spacing: 0.2px; }
.wallet--empty { color: var(--ink-3); font-family: inherit; }
.pill--wallet {
  background: var(--pi-soft);
  color: var(--pi-dark);
  border-color: #e4d5ec;
  font-family: -apple-system, "PingFang SC", sans-serif;
  letter-spacing: 0;
}
.wallet-note { margin-top: 8px; }

/* ---------- 自定义金额 ---------- */
.custom {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed #d9cfe2;
  border-radius: 12px;
  background: #fbf9fd;
}
.custom__head { display: flex; flex-direction: column; gap: 2px; margin-bottom: 9px; }
.custom__title { font-weight: 600; font-size: 14px; }
.custom__desc { font-size: 11.5px; color: var(--ink-3); line-height: 1.45; }

.custom__row { display: flex; gap: 9px; align-items: stretch; }
.amount-field {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 11px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.amount-field:focus-within { border-color: var(--pi); box-shadow: 0 0 0 3px rgba(125, 70, 152, 0.12); }
.amount-field.is-invalid { border-color: var(--err); box-shadow: 0 0 0 3px rgba(179, 38, 30, 0.1); }
.amount-field input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  font: 16px/1.4 inherit;
  font-variant-numeric: tabular-nums;
  color: var(--ink);
  padding: 10px 0;
}
.amount-field input::placeholder { color: #b8b2c0; }
.amount-unit { color: var(--ink-3); font-size: 14px; font-weight: 600; }
.btn--pay-custom { flex: 0 0 auto; padding: 0 18px; }

.chips { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 9px; }
.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink-2);
  border-radius: 999px;
  padding: 3px 11px;
  font-size: 12px;
  font-family: inherit;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}
.chip:hover { border-color: #d8d2de; background: #faf9fb; }
.chip:active { transform: translateY(1px); }

.amount-hint { margin: 8px 0 0; font-size: 11.5px; color: var(--ink-3); }
.amount-hint.is-error { color: var(--err); }
.custom .form-error { margin-top: 9px; font-size: 12px; }

/* ---------- 商品 ---------- */
.products { display: flex; flex-direction: column; gap: 10px; }

.product {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fcfbfd;
}
.product__body { flex: 1; min-width: 0; }
.product__name { font-weight: 600; font-size: 14px; }
.product__desc { font-size: 12px; color: var(--ink-3); margin-top: 2px; line-height: 1.45; }
.product__side { flex: 0 0 auto; display: flex; flex-direction: column; align-items: flex-end; gap: 7px; }
.price {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--pi-dark);
  font-size: 15px;
}
.product .btn--pay { width: auto; padding: 7px 14px; font-size: 13px; }

/* ---------- 订单 ---------- */
.orders { display: flex; flex-direction: column; gap: 9px; }
.empty { color: var(--ink-3); font-size: 13px; text-align: center; padding: 14px 0; margin: 0; }

.order {
  border: 1px solid var(--line);
  border-radius: 11px;
  padding: 10px 12px;
  background: #fcfbfd;
  font-size: 12.5px;
}
.order__top { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.order__name { font-weight: 600; font-size: 13.5px; flex: 1; }
.order__amt { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--pi-dark); }
.order__meta { color: var(--ink-3); font-family: ui-monospace, Menlo, monospace; font-size: 11.5px; word-break: break-all; }
.order__actions { margin-top: 7px; display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

.pill {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
}
.pill--approved { background: #eef4fd; color: #2c5aa0; border-color: #d5e3f7; }
.pill--completed { background: var(--ok-bg); color: var(--ok); border-color: #c6e9db; }
.pill--failed { background: var(--err-bg); color: var(--err); border-color: #f5cdc9; }
.pill--demo { background: var(--warn-bg); color: var(--warn); border-color: #f0dcb4; }

/* ---------- 日志 ---------- */
.log {
  list-style: none;
  margin: 0;
  padding: 0;
  max-height: 320px;
  overflow-y: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.55;
  background: #fbfafc;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 11px;
}
.log:empty::after {
  content: "暂无事件";
  color: var(--ink-3);
  font-family: inherit;
}
.log li { padding: 2px 0; border-bottom: 1px dashed #efecf2; color: var(--ink-2); }
.log li:last-child { border-bottom: none; }
.log .t { color: var(--ink-3); margin-right: 6px; }
.log .ok { color: var(--ok); }
.log .err { color: var(--err); }
.log .hi { color: var(--pi-dark); font-weight: 600; }

/* ---------- 页脚 ---------- */
footer {
  padding: 22px 16px 0;
  text-align: center;
  font-size: 12px;
  color: var(--ink-3);
  display: flex;
  gap: 8px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
footer a { color: var(--ink-3); text-decoration: none; border-bottom: 1px solid var(--line); }
footer a:hover { color: var(--pi); border-color: var(--pi); }

/* ---------- 法规页面 ---------- */
.doc { max-width: 720px; margin: 0 auto; padding: 20px 18px 40px; }
.doc h1 { font-size: 20px; margin: 0 0 4px; }
.doc .updated { color: var(--ink-3); font-size: 12px; margin: 0 0 18px; }
.doc h2 { font-size: 15px; margin: 20px 0 6px; color: var(--pi-dark); }
.doc p, .doc li { font-size: 13.5px; color: var(--ink-2); line-height: 1.75; }
.doc ul { padding-left: 20px; }
.doc a { color: var(--pi); }

@media (min-width: 640px) {
  main { max-width: 760px; margin: 0 auto; }
  .topbar { padding: 18px 24px; }
  .banner { max-width: 760px; margin: 16px auto 0; }
  .doc { padding-top: 32px; }
}