* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --primary: #2bb6a3;
  --primary-dark: #1f7a6b;
  --bg: #f4f6f8;
  --card: #ffffff;
  --text: #2c3e50;
  --muted: #8a97a3;
  --border: #e3e8ee;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 20px; background: #fff; box-shadow: 0 1px 6px rgba(0,0,0,.06);
  position: sticky; top: 0; z-index: 10;
}
.brand { font-size: 20px; font-weight: 700; color: var(--primary-dark); }
.userbox { font-size: 14px; color: var(--muted); display: flex; align-items: center; gap: 10px; }
.container { max-width: 960px; margin: 0 auto; padding: 20px; }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 20px; margin-bottom: 18px; box-shadow: 0 2px 10px rgba(0,0,0,.03);
}
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
h2 { font-size: 18px; margin-bottom: 12px; color: var(--primary-dark); }
h3 { font-size: 16px; margin-bottom: 12px; }
.hint { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.form-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
input, select {
  flex: 1; min-width: 160px; padding: 11px 13px; border: 1px solid var(--border);
  border-radius: 10px; font-size: 15px; outline: none; background: #fff;
}
input:focus, select:focus { border-color: var(--primary); }
.btn {
  padding: 11px 18px; border: none; border-radius: 10px; font-size: 15px;
  cursor: pointer; transition: .15s; font-weight: 600;
}
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: #eef2f5; color: var(--text); }
.btn.danger { background: #ffe9e9; color: #d33; }
.err { color: #e74c3c; font-size: 13px; margin-top: 8px; min-height: 18px; }
.login-card { max-width: 420px; margin: 40px auto; }
.empty { color: var(--muted); font-size: 14px; padding: 14px 0; text-align: center; }

.theme-lib { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
.theme-group { border: 1px dashed var(--border); border-radius: 10px; padding: 10px; }
.theme-group h4 { font-size: 13px; color: var(--primary-dark); margin-bottom: 8px; }
.theme-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag {
  font-size: 12px; padding: 5px 10px; background: #eafaf6; color: var(--primary-dark);
  border-radius: 20px; cursor: pointer; border: 1px solid #cdeee6;
}
.tag:hover { background: var(--primary); color: #fff; }

.proj-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.proj-card {
  border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: #fff;
  display: flex; flex-direction: column; gap: 8px;
}
.proj-card .pt { font-weight: 700; font-size: 15px; }
.proj-card .pm { font-size: 12px; color: var(--muted); }
.proj-card .actions { display: flex; gap: 8px; margin-top: auto; }
.proj-card .actions .btn { flex: 1; padding: 8px; font-size: 13px; }

@media (max-width: 560px) {
  .container { padding: 12px; }
  .card { padding: 16px; }
  .form-row { flex-direction: column; }
  input, select { min-width: 0; width: 100%; }
}