:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #dbe8ff;
  --danger: #d6336c;
  --danger-soft: #fef0f5;
  --ok: #1a7f37;
  --ok-soft: #effaf2;
  --warn: #cf6f0a;
  --warn-soft: #fff7ed;
  --ink: #1f2328;
  --muted: #57606a;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --border: #d0d7de;
  --border-soft: #e6e9ec;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(31, 35, 40, 0.08), 0 4px 14px rgba(31, 35, 40, 0.05);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Navbar */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
}
.navbar .brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; font-size: 1.05rem; }
.navbar .logo {
  width: 30px; height: 30px;
  background: linear-gradient(135deg, var(--primary), #6b9eff);
  border-radius: 8px;
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 1rem;
}
.navbar .nav-links { display: flex; gap: 1.2rem; align-items: center; }
.navbar .nav-links a { color: var(--muted); font-size: 0.92rem; }
.navbar .nav-links a:hover { color: var(--primary); text-decoration: none; }
.navbar .nav-user { color: var(--muted); font-size: 0.88rem; }

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 1.8rem 1.5rem 4rem; }
.container.narrow { max-width: 460px; padding-top: 4rem; }

/* Card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.6rem;
}
.card + .card { margin-top: 1.2rem; }
.card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 1rem; display:flex; align-items:center; gap:.5rem; }
.card-title .count { font-size: .85rem; color: var(--muted); font-weight: 400; }

/* Forms */
label { display: block; font-size: 0.88rem; color: var(--muted); margin-bottom: 0.35rem; font-weight: 500; }
input, textarea, select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: var(--font);
  background: var(--surface);
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
textarea { resize: vertical; min-height: 90px; }
.form-row { margin-bottom: 1rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hint { font-size: 0.8rem; color: var(--muted); margin-top: 0.3rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
}
.btn:hover { background: var(--bg); text-decoration: none; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-danger:hover { background: #b8275a; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn-ghost:hover { background: var(--bg); }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.82rem; }
.btn-block { width: 100%; }

/* Badge */
.badge { display: inline-flex; align-items: center; padding: 0.15rem 0.55rem; border-radius: 20px; font-size: 0.74rem; font-weight: 600; }
.badge-pending { background: var(--warn-soft); color: var(--warn); }
.badge-shown { background: var(--ok-soft); color: var(--ok); }
.badge-hidden { background: var(--danger-soft); color: var(--danger); }
.badge-open { background: var(--ok-soft); color: var(--ok); }
.badge-closed { background: #f0f1f3; color: var(--muted); }
.badge-audit { background: var(--primary-soft); color: var(--primary); }

/* Table */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; min-width: 560px; }
table th, table td { padding: 0.65rem 0.85rem; text-align: left; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
table thead th { background: #f6f8fa; font-weight: 600; position: sticky; top: 0; }
table tbody tr:last-child td { border-bottom: none; }
table tbody tr:hover { background: #f9fafb; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); font-size: 0.82rem; }
.break-all { word-break: break-all; }

/* Project item */
.proj-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}
.proj-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; }
.proj-name { font-size: 1.1rem; font-weight: 700; }
.proj-meta { color: var(--muted); font-size: 0.82rem; margin-top: 0.3rem; }
.proj-badges { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 0.6rem; }
.proj-stats { display: flex; gap: 1.5rem; margin-top: 0.8rem; font-size: 0.85rem; }
.proj-stats b { font-size: 1.15rem; color: var(--primary); }
.proj-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.qr-box { margin-top: 1rem; padding: 1rem; background: var(--bg); border-radius: 8px; text-align: center; }
.qr-box img, .qr-box canvas { display: inline-block; }

/* Filter bar */
.filter-bar { display: flex; gap: 0.6rem; flex-wrap: wrap; align-items: center; margin-bottom: 1rem; }
.filter-bar select { width: auto; padding: 0.4rem 0.6rem; }

/* Login */
.auth-card { text-align: center; }
.auth-card h1 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.auth-card .sub { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.5rem; }
.auth-logo {
  width: 56px; height: 56px; margin: 0 auto 1rem;
  background: linear-gradient(135deg, var(--primary), #6b9eff);
  border-radius: 14px; display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: 1.7rem;
}

/* Message list (admin) */
.msg-item { display: flex; gap: 0.8rem; padding: 0.85rem 0; border-bottom: 1px solid var(--border-soft); }
.msg-item:last-child { border-bottom: none; }
.msg-body { flex: 1; min-width: 0; }
.msg-nick { font-weight: 600; font-size: 0.9rem; }
.msg-text { margin-top: 0.15rem; font-size: 0.92rem; word-break: break-word; }
.msg-time { color: var(--muted); font-size: 0.78rem; margin-top: 0.3rem; }
.msg-actions { display: flex; gap: 0.4rem; flex-shrink: 0; }
.msg-item .msg-check { width: auto; flex-shrink: 0; margin-top: 0.3rem; cursor: pointer; }

/* 批量操作栏 */
.bulk-bar {
  display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap;
  padding: 0.6rem 0.8rem; margin-bottom: 0.8rem;
  background: var(--bg); border: 1px solid var(--border-soft); border-radius: 8px;
}
.bulk-bar label { margin: 0; display: flex; align-items: center; gap: 0.4rem; cursor: pointer; white-space: nowrap; }
.bulk-bar input[type=checkbox] { width: auto; cursor: pointer; }
.bulk-bar .muted { font-size: 0.84rem; }

/* Toast */
#toast {
  position: fixed; top: 1.2rem; left: 50%; transform: translateX(-50%);
  z-index: 9999; display: flex; flex-direction: column; gap: 0.5rem; align-items: center;
}
.toast-item {
  background: var(--ink); color: #fff; padding: 0.6rem 1.1rem; border-radius: 8px;
  font-size: 0.88rem; box-shadow: 0 6px 20px rgba(0,0,0,0.18);
  animation: toastIn 0.2s ease;
  max-width: 90vw;
}
.toast-item.ok { background: var(--ok); }
.toast-item.err { background: var(--danger); }
@keyframes toastIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

.empty { text-align: center; color: var(--muted); padding: 2.5rem 1rem; font-size: 0.9rem; }

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .navbar { padding: 0 1rem; }
  .container { padding: 1.2rem 1rem 3rem; }
  .proj-stats { gap: 1rem; }
}