:root {
  --bg: #f8fafc;
  --card: #ffffff;
  --primary: #111827;
  --text: #1a1a1a;
  --text2: #6b7280;
  --border: #e5e7eb;
  --radius: 12px;
  --blue: #3b82f6;
  --green: #10b981;
  --red: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--blue); text-decoration: none; transition: color 0.15s; }
a:hover { text-decoration: underline; }
.container { max-width: 960px; margin: 0 auto; padding: 20px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.btn {
  display: inline-block;
  padding: 10px 20px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  transition: all 0.15s ease;
  font-family: inherit;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: #000; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(17,24,39,0.25); }
.btn-blue { background: var(--blue); color: #fff; }
.btn-blue:hover { background: #2563eb; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.3); }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: #dc2626; transform: translateY(-1px); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: var(--bg); border-color: #d1d5db; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }
.btn:active { transform: translateY(0); }

input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
  background: var(--card);
  color: var(--text);
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
}
input::placeholder, textarea::placeholder { color: #9ca3af; }

label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; }
.field { margin-bottom: 16px; }

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.nav-brand { font-weight: 700; font-size: 17px; }
.nav-links { display: flex; gap: 16px; align-items: center; }
.nav-links a { color: var(--text2); font-size: 14px; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.hint { font-size: 12px; color: var(--text2); margin-top: -10px; margin-bottom: 16px; }

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 14px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.alert-ok { background: #ecfdf5; color: #065f46; border: 1px solid #d1fae5; }
.alert-err { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--border); font-size: 14px; }
th { color: var(--text2); font-weight: 600; font-size: 13px; text-transform: uppercase; letter-spacing: 0.03em; }
tbody tr { transition: background 0.1s; }
tbody tr:hover { background: var(--bg); }

.badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 12px; font-weight: 500; }
.badge-green { background: #d1fae5; color: #065f46; }
.badge-yellow { background: #fef3c7; color: #92400e; }
.badge-gray { background: #f3f4f6; color: #6b7280; }
.badge-blue { background: #dbeafe; color: #1e40af; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

@media (max-width: 768px) {
  .grid2 { grid-template-columns: 1fr; }
  .nav { padding: 12px 16px; }
  .nav-links { gap: 12px; }
  .container { padding: 16px; }
  .card { padding: 18px; }
}
@media (max-width: 640px) {
  .nav-links { gap: 10px; }
}