/* ===== 基础与变量 ===== */
:root {
  --pink: #f6528f;
  --pink-strong: #ec407a;
  --pink-light: #ffd3e2;
  --pink-soft: #fff1f6;
  --white: #ffffff;
  --text: #3b2b35;
  --text-muted: #a08d97;
  --radius: 18px;
  --shadow: 0 10px 30px rgba(246, 82, 143, 0.14);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  color: var(--text);
  background: linear-gradient(160deg, #fff8fb 0%, #fff1f6 45%, #ffe3ef 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.page {
  max-width: 520px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

/* ===== 头部 ===== */
.header { text-align: center; margin-bottom: 24px; }
.title {
  margin: 0;
  font-size: 28px;
  font-weight: 800;
  background: linear-gradient(120deg, #ec407a, #f6528f);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.subtitle { margin: 6px 0 0; color: var(--text-muted); font-size: 14px; }

/* ===== 卡片 ===== */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin-bottom: 18px;
}
.card-title {
  margin: 0 0 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--pink-strong);
  letter-spacing: 1px;
}

/* ===== 余量展示 ===== */
.remaining-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 0 20px;
}
.remaining-label { font-size: 14px; color: var(--text-muted); letter-spacing: 2px; }
.remaining-value {
  font-size: clamp(72px, 24vw, 120px);
  font-weight: 900;
  line-height: 1;
  margin: 8px 0 4px;
  color: var(--pink-strong);
  font-variant-numeric: tabular-nums;
}
.remaining-unit { font-size: 15px; color: var(--text-muted); }

/* ===== 操作区 ===== */
.action-row { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.action-row label { font-size: 14px; color: var(--text); flex-shrink: 0; }
.action-row input {
  flex: 1;
  min-width: 0;
  padding: 10px 12px;
  border: 1.5px solid var(--pink-light);
  border-radius: 10px;
  font-size: 15px;
  color: var(--text);
  outline: none;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.action-row input:focus {
  border-color: var(--pink);
  box-shadow: 0 0 0 3px rgba(246, 82, 143, 0.12);
}

.btn-row { display: flex; gap: 10px; margin-bottom: 16px; }

.btn {
  flex: 1;
  padding: 12px 16px;
  border: none;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.2s, background 0.2s;
  letter-spacing: 1px;
  user-select: none;
}
.btn:active { transform: translateY(1px) scale(0.99); }

.btn-use {
  background: linear-gradient(120deg, #f6528f, #ec407a);
  color: #fff;
  box-shadow: 0 6px 16px rgba(246, 82, 143, 0.35);
}
.btn-use:hover { box-shadow: 0 8px 20px rgba(246, 82, 143, 0.45); }

.btn-refund {
  background: #fff;
  color: var(--pink-strong);
  border: 1.5px solid var(--pink);
  padding: 11px 16px;
}
.btn-refund:hover { background: var(--pink-soft); }

.btn-set {
  flex: 0 0 auto;
  background: var(--pink-soft);
  color: var(--pink-strong);
  border: 1.5px solid var(--pink-light);
  padding: 11px 18px;
}
.btn-set:hover { background: #ffe7f0; }

.divider { height: 1px; background: #ffe0ed; margin: 4px 0 16px; }
.hint { margin: 4px 0 0; font-size: 12px; color: var(--text-muted); line-height: 1.6; }

/* ===== 日志 ===== */
.log-list { list-style: none; margin: 0; padding: 0; max-height: 380px; overflow-y: auto; }
.log-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 6px;
  border-bottom: 1px solid #fff0f5;
}
.log-item:last-child { border-bottom: none; }

.log-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.log-badge.use { background: linear-gradient(120deg, #f04b5f, #e0244e); }
.log-badge.refund { background: linear-gradient(120deg, #34c08f, #27a974); }
.log-badge.set_remaining { background: linear-gradient(120deg, #a78bfa, #8b5cf6); }

.log-main { flex: 1; min-width: 0; }
.log-line { font-size: 15px; font-weight: 700; color: var(--text); }
.log-remaining { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.log-time { font-size: 12px; color: var(--text-muted); flex-shrink: 0; }

.log-empty { padding: 20px 0; text-align: center; color: var(--text-muted); font-size: 13px; }

/* ===== 提示浮层 ===== */
.toast {
  position: fixed;
  top: 18px;
  left: 50%;
  transform: translateX(-50%) translateY(-150%);
  padding: 11px 22px;
  border-radius: 999px;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 100;
  max-width: 90vw;
  text-align: center;
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: linear-gradient(120deg, #f6528f, #ec407a); }
.toast.error { background: linear-gradient(120deg, #f04b5f, #e0244e); }

/* ===== 页脚 ===== */
.footer { text-align: center; color: var(--text-muted); font-size: 12px; margin-top: 8px; }

/* ===== 响应式 ===== */
@media (max-width: 460px) {
  .page { padding: 16px 12px 32px; }
  .card { padding: 16px; }
  .btn-row { flex-direction: column; }
  .remaining-value { font-size: clamp(60px, 28vw, 100px); }
}