/* ===== Default (light) theme ===== */
:root {
  --bg:#ffffff;
  --card:#f9fafb;
  --muted:#64748b;
  --text:#0f172a;
  --accent:#4cc9f0;
  --border:#e2e8f0;
}

/* ===== Dark theme ===== */
:root[data-theme="dark"] {
  --bg:#0b1220;
  --card:#10192e;
  --muted:#9fb0c7;
  --text:#e7eefb;
  --accent:#4cc9f0;
  --border:#1b2847;
}

/* ===== Shared styling (unchanged) ===== */
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
header.leader{position:sticky;top:0;z-index:50;background:var(--card);border-bottom:1px solid var(--border)}
.leader-inner{display:flex;gap:16px;align-items:center;max-width:1200px;margin:0 auto;padding:12px 16px}
.brand{font-weight:700;letter-spacing:.2px}
nav.menu{display:flex;gap:16px}
.menu a{color:var(--text);opacity:.9}
.menu a.active{color:var(--accent)}
.user{margin-left:auto;color:var(--muted);font-size:14px;display:flex;gap:12px;align-items:center}
.container{max-width:1200px;margin:24px auto;padding:0 16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px;box-shadow:0 6px 18px rgba(0,0,0,.15)}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid var(--border);padding:10px 8px;text-align:left}
.table th{color:var(--muted);font-weight:600}
.actions{display:flex;gap:10px}
.btn{display:inline-flex;gap:8px;align-items:center;background:var(--card);border:1px solid var(--border);color:var(--text);padding:8px 12px;border-radius:10px}
.btn:hover{background:rgba(0,0,0,.05)}
.btn.secondary{background:transparent}
.btn.danger{background:#3b0f16;border-color:#5a1d27;color:#fff}
.form label{display:block;margin:10px 0 6px;color:var(--muted)}
.form input,.form textarea,.form select{width:100%;background:var(--card);border:1px solid var(--border);color:var(--text);padding:10px;border-radius:10px}
.grid{display:grid;gap:16px}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.flash{margin-bottom:16px}
small.muted{color:var(--muted)}
footer{margin:40px 0;color:var(--muted);text-align:center;font-size:13px}