:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --accent: #A068FF;
  --accent-dark: #7F3FE0;
  --text: #1f2330;
  --text-2: #5f6472;
  --border: #e6e8ef;
  --danger: #e24b4a;
  --success: #1d9e75;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

/* 紫丹统一顶部栏 */
.topbar {
  height: 60px;
  background: linear-gradient(90deg, #0d0726, #1a0f3d);
  display: flex;
  align-items: center;
  padding: 0 20px;
  color: #fff;
  gap: 12px;
}
.logo-chip { height: 32px; width: auto; border-radius: 6px; background: #fff; padding: 2px; }
.brand-name { font-weight: 600; font-size: 16px; }
.version {
  font-size: 12px;
  background: rgba(255, 255, 255, 0.18);
  padding: 2px 10px;
  border-radius: 999px;
}
.back-nav {
  margin-left: auto;
  color: #fff;
  text-decoration: none;
  font-size: 13px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 6px 14px;
  border-radius: 8px;
}
.back-nav:hover { background: rgba(255, 255, 255, 0.12); }

.container { max-width: 640px; margin: 28px auto; padding: 0 16px; }
.page-title { font-size: 22px; margin: 0 0 6px; font-weight: 600; }
.page-sub { color: var(--text-2); margin: 0 0 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
  box-shadow: 0 1px 2px rgba(20, 20, 40, 0.04);
}

.field { display: block; margin-bottom: 16px; }
.label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 6px; }
.label em { color: var(--accent); font-style: normal; }
.field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  background: #fff;
}
.field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(160, 104, 255, 0.15); }

.btn-primary {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
}
.btn-primary:hover { background: var(--accent-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.form-msg { margin: 12px 0 0; font-size: 13px; min-height: 18px; }
.form-msg.error { color: var(--danger); }
.form-msg.ok { color: var(--success); }

.result { margin-top: 20px; }
.hidden { display: none; }
.result-title { margin: 0 0 14px; font-size: 17px; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.result-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.result-item .k { font-size: 12px; color: var(--text-2); }
.result-item .v { font-size: 16px; font-weight: 600; word-break: break-all; }
.join-link {
  display: inline-block;
  margin-top: 16px;
  color: var(--accent-dark);
  text-decoration: none;
  font-weight: 500;
}
.join-link:hover { text-decoration: underline; }

/* 已被预定的时段 */
.booked { margin-bottom: 20px; }
.booked-title { margin: 0 0 12px; font-size: 15px; font-weight: 600; color: var(--text); }
.booked-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.booked-list li {
  font-size: 13px;
  color: var(--text-2);
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 8px 12px;
}
.booked-empty { color: var(--text-2); border-left-color: var(--border) !important; }