:root{
  --bg:#f5f7fb;
  --surface:#ffffff;
  --surface-2:#f8fafc;
  --line:#d8dee8;
  --text:#172033;
  --muted:#667085;
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --danger:#dc2626;
  --shadow:0 10px 28px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Yu Gothic",Meiryo,sans-serif;font-size:15px;line-height:1.55}
a{color:var(--primary)}
.admin-header{position:sticky;top:0;z-index:10;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 2px 14px rgba(15,23,42,.05)}
.admin-brand{display:block;padding:14px 16px 8px;color:var(--text);font-weight:800;text-decoration:none;letter-spacing:.01em}
.admin-nav{display:flex;gap:6px;overflow-x:auto;padding:0 12px 12px;scrollbar-width:none}
.admin-nav::-webkit-scrollbar{display:none}
.admin-nav a{flex:0 0 auto;text-decoration:none;color:var(--text);font-size:14px;font-weight:700;padding:9px 12px;border:1px solid var(--line);border-radius:999px;background:var(--surface-2)}
.admin-nav a:hover{border-color:#b7c3d5;background:#eef4ff}
.admin-main{width:100%;max-width:1180px;margin:0 auto;padding:18px 12px 72px}
h1{font-size:24px;line-height:1.2;margin:0 0 16px;color:var(--text)}
h2{font-size:17px;margin:0 0 14px;color:var(--text)}
.panel,.login-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:16px;margin:14px 0}
.login-body{min-height:100vh;display:grid;place-items:center;padding:18px}
.login-card{width:min(420px,100%);display:grid;gap:14px}
.form-grid{display:grid;gap:14px}
.form-inline{display:grid;gap:12px}
label{display:grid;gap:6px;color:var(--muted);font-size:13px;font-weight:700}
.check{display:flex;align-items:center;gap:9px;min-height:44px;color:var(--text)}
input,textarea,select{width:100%;min-height:46px;background:#fff;border:1px solid #cfd7e3;color:var(--text);padding:11px 12px;border-radius:8px;font-size:16px}
textarea{min-height:140px}
input:focus,select:focus,textarea:focus{outline:3px solid rgba(37,99,235,.16);border-color:var(--primary)}
input[type="checkbox"]{width:20px;min-height:20px;accent-color:var(--primary)}
button,.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;width:100%;border:0;border-radius:8px;background:var(--primary);color:white;text-decoration:none;padding:11px 16px;font-size:15px;font-weight:800;cursor:pointer}
button:hover,.button:hover{background:var(--primary-dark)}
.link-danger{background:none;border:0;color:var(--danger);padding:0;margin:8px 0 0;width:auto;min-height:0;font-weight:800}
.inline{display:inline}
.alert{padding:12px 14px;background:#fef2f2;border:1px solid #fecaca;border-radius:10px;color:#991b1b}
.notice{padding:12px 14px;background:#eff6ff;border:1px solid #bfdbfe;border-radius:10px;color:#1e3a8a}
.hint,.muted{color:var(--muted);font-size:12px}
table{width:100%;border-collapse:separate;border-spacing:0;margin-top:12px;background:var(--surface);border:1px solid var(--line);border-radius:10px;overflow:hidden}
th,td{border-bottom:1px solid var(--line);padding:10px;text-align:left;vertical-align:top}
th{color:var(--muted);font-size:12px;background:var(--surface-2)}
tr:last-child td{border-bottom:0}
.stats{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.stat{display:block;padding:14px;background:var(--surface);border:1px solid var(--line);border-radius:10px;text-decoration:none;box-shadow:var(--shadow)}
.stat span{display:block;color:var(--muted);font-size:11px;font-weight:800;letter-spacing:.04em}
.stat strong{font-size:28px;line-height:1.15;color:var(--text)}
.thumbs,.image-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(132px,1fr));gap:12px}
.thumbs img,.image-grid img,.preview{max-width:220px;width:100%;height:auto;border:1px solid var(--line);border-radius:8px;background:#fff}
figure{margin:0;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px}
figcaption{font-size:11px;color:var(--muted);word-break:break-all}
@media(min-width:720px){
  .admin-header{display:flex;align-items:center;justify-content:space-between;padding:0 12px}
  .admin-brand{padding:14px 10px}
  .admin-nav{padding:10px 0}
  .form-inline{display:flex;align-items:end;flex-wrap:wrap}
  .form-inline label{flex:1 1 180px}
  .form-inline button,.form-inline .button{width:auto}
  button,.button{width:auto}
  .stats{grid-template-columns:repeat(4,minmax(0,1fr))}
}