:root {
  --primary: #2f6fed;
  --primary-dark: #1f56c4;
  --green: #22a06b;
  --green-bg: #e8f7f0;
  --red: #d64545;
  --red-bg: #fdeaea;
  --orange: #e8930c;
  --orange-bg: #fdf3e3;
  --gray: #6b7280;
  --line: #e6e8eb;
  --bg: #f4f6f9;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  background: var(--bg);
  color: #1f2733;
}
button { cursor: pointer; font-family: inherit; }
input, select, textarea { font-family: inherit; }

/* ---------- 登录页 ---------- */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #1f56c4, #2f6fed);
}
.auth-card {
  background: #fff; padding: 40px 36px; border-radius: 14px; width: 360px;
  box-shadow: 0 12px 40px rgba(0,0,0,.2);
}
.auth-card h1 { font-size: 22px; margin-bottom: 4px; }
.auth-card .sub { color: var(--gray); font-size: 13px; margin-bottom: 22px; }
.auth-card label { font-size: 13px; color: #4b5563; display: block; margin: 12px 0 6px; }
.auth-card input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 8px; font-size: 14px;
}
.auth-card input:focus { outline: none; border-color: var(--primary); }
.auth-card .err { color: var(--red); font-size: 13px; min-height: 18px; margin-top: 8px; }
.btn-primary {
  width: 100%; padding: 11px; border: none; border-radius: 8px;
  background: var(--primary); color: #fff; font-size: 15px; margin-top: 6px;
}
.btn-primary:hover { background: var(--primary-dark); }

/* ---------- 顶栏 ---------- */
.topbar {
  background: #fff; border-bottom: 1px solid var(--line);
  padding: 0 24px; height: 58px; display: flex; align-items: center;
  justify-content: space-between; position: sticky; top: 0; z-index: 20;
}
.topbar .brand { font-size: 18px; font-weight: 700; color: var(--primary); }
.topbar .right { display: flex; align-items: center; gap: 18px; }
.topbar .meta { font-size: 12px; color: var(--gray); }
.link-btn {
  border: none; background: none; color: var(--red); font-size: 13px;
}

/* ---------- 概览统计 ---------- */
.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr));
  gap: 14px; margin-bottom: 22px;
}
.stat-card { background: #fff; border-radius: 12px; padding: 18px; border: 1px solid var(--line); }
.stat-card .num { font-size: 28px; font-weight: 700; }
.stat-card .label { color: var(--gray); font-size: 13px; margin-top: 4px; }
.stat-card.blue .num { color: var(--primary); }
.stat-card.green .num { color: var(--green); }
.stat-card.orange .num { color: var(--orange); }
.stat-card.red .num { color: var(--red); }

/* ---------- 工具条 ---------- */
.toolbar { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; align-items: center; }
.btn {
  padding: 9px 16px; border-radius: 8px; border: 1px solid var(--line);
  background: #fff; font-size: 13px;
}
.btn:hover { border-color: var(--primary); color: var(--primary); }
.btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn.primary:hover { background: var(--primary-dark); color: #fff; }
.btn.sm { padding: 5px 10px; font-size: 12px; }
.btn.danger { color: var(--red); }
.btn.danger:hover { border-color: var(--red); color: var(--red); background: var(--red-bg); }
.btn.warn { color: var(--orange); }
.btn.warn:hover { border-color: var(--orange); background: var(--orange-bg); }
.filter-tag { margin-left: auto; font-size: 12px; color: var(--gray); }

/* ---------- 房间卡片网格 ---------- */
.room-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr));
  gap: 16px;
}
.room-card {
  background: #fff; border-radius: 12px; border: 1px solid var(--line);
  padding: 16px; position: relative; transition: box-shadow .15s;
}
.room-card:hover { box-shadow: 0 6px 18px rgba(0,0,0,.06); }
.room-card .head { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.room-card .name { font-size: 18px; font-weight: 700; }
.room-card .dot { width: 10px; height: 10px; border-radius: 50%; }
.room-card.vacant .dot { background: var(--green); }
.room-card.rented .dot { background: var(--orange); }
.room-card.overdue .dot { background: var(--red); }
.badge {
  font-size: 11px; padding: 2px 8px; border-radius: 20px; font-weight: 600;
}
.badge.vacant { background: var(--green-bg); color: var(--green); }
.badge.rented { background: var(--orange-bg); color: var(--orange); }
.badge.overdue { background: var(--red-bg); color: var(--red); }
.room-card .body { font-size: 13px; color: #4b5563; line-height: 1.9; }
.room-card .body b { color: #1f2733; }
.room-card .ops { margin-top: 12px; display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: none; align-items: flex-start; justify-content: center; z-index: 100;
  overflow-y: auto; padding: 40px 16px;
}
.modal-mask.show { display: flex; }
.modal {
  background: #fff; border-radius: 14px; width: 640px; max-width: 100%;
  padding: 26px 28px; box-shadow: 0 16px 50px rgba(0,0,0,.25);
}
.modal h2 { font-size: 18px; margin-bottom: 18px; }
.modal .close { float: right; border: none; background: none; font-size: 20px; color: var(--gray); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 16px; }
.form-grid .full { grid-column: 1 / -1; }
.field label { display: block; font-size: 12.5px; color: #4b5563; margin-bottom: 5px; }
.field.required label::after { content: " *"; color: var(--red); }
.field input, .field select, .field textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--line);
  border-radius: 8px; font-size: 13.5px;
}
.field textarea { resize: vertical; min-height: 60px; }
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--primary); }
.modal .actions { margin-top: 20px; display: flex; justify-content: flex-end; gap: 10px; }
.btn-cancel { padding: 10px 18px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.hint { font-size: 12px; color: var(--gray); margin-top: 4px; }

/* ---------- Toast ---------- */
#toast {
  position: fixed; top: 72px; left: 50%; transform: translateX(-50%);
  background: #333; color: #fff; padding: 10px 20px; border-radius: 8px;
  font-size: 13px; opacity: 0; pointer-events: none; transition: opacity .25s;
  z-index: 200;
}
#toast.show { opacity: 1; }
#toast.ok { background: var(--green); }
#toast.err { background: var(--red); }

#app.loading { opacity: .4; pointer-events: none; }
.empty { text-align: center; color: var(--gray); padding: 40px; }