:root{
    --bg:#0f1226; --bg2:#171a36; --card:#1e2244; --card2:#262b54;
    --line:#33386b; --text:#e9ebff; --muted:#9aa0d4; --soft:#c3c8f5;
    --primary:#7c5cff; --primary2:#9d7bff; --accent:#ff5c8a; --green:#36d399;
    --gold:#ffcf6b; --radius:18px;
    --inputbg:#13162e; --cardgrad1:#1e2244; --cardgrad2:#171a36;
    --glow1:#3a2a8c; --glow2:#1d3a8c; --glow3:#5a1f6e; --shadow:rgba(0,0,0,.38);
    --chipbg:#13162e; --barbg:#11142c;
    --brandgrad:linear-gradient(90deg,#9d7bff,#ff8fb1 55%,#ffcf6b);
  }
  [data-theme="light"]{
    --bg:#f3f4fb; --bg2:#ffffff; --card:#ffffff; --card2:#f6f7fe;
    --line:#e3e6f4; --text:#1b1f30; --muted:#717798; --soft:#444a72;
    --primary:#6b4eff; --primary2:#7a5cff; --accent:#ff3d7a; --green:#1aa974;
    --gold:#c98a10;
    --inputbg:#ffffff; --cardgrad1:#ffffff; --cardgrad2:#fbfcff;
    --glow1:#dcd6ff; --glow2:#d4e4ff; --glow3:#ffe0ef; --shadow:rgba(90,100,150,.16);
    --chipbg:#f1f2fb; --barbg:#eceefa;
    --brandgrad:linear-gradient(90deg,#6b4eff,#ff4d83 55%,#e0930f);
  }
  *{box-sizing:border-box}
  body{margin:0;font-family:'Sarabun',sans-serif;background:
        radial-gradient(1100px 700px at 92% -12%, var(--glow1) 0%, transparent 55%),
        radial-gradient(950px 650px at -8% 4%, var(--glow2) 0%, transparent 52%),
        radial-gradient(800px 800px at 55% 118%, var(--glow3) 0%, transparent 55%),
        var(--bg);background-attachment:fixed;color:var(--text);line-height:1.6;
        transition:background .25s,color .25s}
  a{color:var(--primary2);text-decoration:none}

  /* App shell */
  .app{display:flex;min-height:100vh}
  .sidebar{width:248px;flex-shrink:0;position:sticky;top:0;align-self:flex-start;height:100vh;
        display:flex;flex-direction:column;gap:4px;padding:18px 14px;
        background:linear-gradient(180deg,var(--card2),var(--bg2));border-right:1px solid var(--line)}
  .side-logo{display:flex;align-items:center;gap:9px;padding:8px 6px 2px;font-weight:800;font-size:21px}
  .side-logo img{width:44px;height:auto;display:block;border-radius:11px;padding:4px;
        background:rgba(255,255,255,.94);box-shadow:0 2px 7px rgba(0,0,0,.32)}
  .side-logo span{background:var(--brandgrad);-webkit-background-clip:text;background-clip:text;color:transparent}
  [data-theme="light"] .side-logo img{background:rgba(20,20,60,.05);box-shadow:0 1px 4px rgba(20,20,60,.12)}
  .login-icon{width:108px;height:auto;border-radius:24px;padding:11px;
        background:rgba(255,255,255,.94);box-shadow:0 8px 22px rgba(0,0,0,.34)}
  [data-theme="light"] .login-icon{background:rgba(20,20,60,.05);box-shadow:0 5px 16px rgba(20,20,60,.13)}
  .side-logo .adm{font-size:22px;line-height:1}
  .side-sub{font-size:10px;letter-spacing:2px;color:var(--muted);font-weight:700;padding:3px 8px 12px}
  .side-user{display:flex;align-items:center;gap:10px;background:var(--inputbg);border:1px solid var(--line);border-radius:12px;padding:10px 12px;margin:2px 4px 10px}
  .side-avatar{width:40px;height:40px;border-radius:50%;object-fit:cover;flex-shrink:0;border:1px solid var(--line)}
  .side-avatar-ph{display:grid;place-items:center;background:linear-gradient(135deg,#7c5cff,#ff5c8a);color:#fff;font-weight:700;font-size:17px}
  .side-name{font-size:13.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .side-credit{font-size:13px;color:var(--gold);font-weight:700;margin-top:3px}
  .side-nav{display:flex;flex-direction:column;gap:3px;flex:1}
  .snav{display:flex;align-items:center;gap:9px;cursor:pointer;font-size:14.5px;font-weight:600;
        color:var(--soft);padding:11px 13px;border-radius:11px;transition:.13s;text-decoration:none}
  .snav:hover{background:var(--inputbg);color:var(--text)}
  .snav.active{background:linear-gradient(90deg,rgba(124,92,255,.28),transparent);
        color:var(--text);box-shadow:inset 3px 0 0 var(--primary)}
  .side-foot{display:flex;align-items:center;gap:8px;padding-top:10px;border-top:1px solid var(--line)}
  .side-foot form{flex:1}
  .theme-btn{cursor:pointer;font-family:inherit;font-size:16px;line-height:1;border:1px solid var(--line);
        background:var(--inputbg);color:var(--text);width:38px;height:38px;border-radius:10px;transition:.15s}
  .theme-btn:hover{border-color:var(--primary2)}
  .content{flex:1;min-width:0;display:flex;flex-direction:column}
  .topbar2{position:sticky;top:0;z-index:15;display:flex;align-items:center;justify-content:space-between;
        gap:14px;padding:15px 26px;background:var(--card2);border-bottom:1px solid var(--line)}
  .topbar2 h1{margin:0;font-size:20px}
  .content-inner{padding:22px 26px 90px;width:100%;max-width:1320px}
  .guest-wrap{max-width:1080px;margin:0 auto;padding:18px 20px 80px}
  @media(max-width:820px){
    .app{flex-direction:column}
    .sidebar{width:auto;height:auto;position:static;border-right:none;
          border-bottom:1px solid var(--line);flex-direction:row;flex-wrap:wrap;align-items:center;gap:6px}
    .side-logo{padding:4px}.side-logo img{width:150px}.side-sub,.side-user{display:none}
    .side-nav{flex-direction:row;flex-wrap:wrap;flex:1 0 100%}
    .side-foot{border-top:none;padding-top:0;width:100%}
    .content-inner{padding:16px}.topbar2{padding:13px 16px}
  }

  /* Components */
  .card{background:linear-gradient(180deg,var(--cardgrad1),var(--cardgrad2));border:1px solid var(--line);
        border-radius:var(--radius);padding:22px;margin:16px 0;box-shadow:0 12px 40px var(--shadow)}
  .card h2{margin:0 0 10px;font-size:20px}
  h1{font-size:26px}
  .btn{appearance:none;border:none;cursor:pointer;font-family:inherit;font-weight:700;font-size:15px;
        padding:11px 20px;border-radius:11px;color:#fff;background:linear-gradient(90deg,var(--primary),var(--accent));
        box-shadow:0 8px 24px var(--shadow);transition:.15s}
  .btn:hover{filter:brightness(1.08)}
  .btn:disabled{opacity:.5;cursor:not-allowed}
  .btn.ghost{background:transparent;border:1.5px solid var(--line);box-shadow:none;color:var(--soft)}
  .btn.green{background:linear-gradient(90deg,#1fae7a,#36d399)}
  .btn.danger{background:linear-gradient(90deg,#c0395c,#ff5c8a)}
  .btn.small{padding:7px 13px;font-size:13px;box-shadow:none}
  input,select,textarea{width:100%;background:var(--inputbg);color:var(--text);border:1px solid var(--line);
        border-radius:10px;padding:10px 12px;font-family:inherit;font-size:14.5px;transition:border .15s}
  input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary)}
  label.fld{display:block;margin:12px 0 5px;font-size:13.5px;color:var(--soft);font-weight:600}
  table{width:100%;border-collapse:collapse;font-size:14px}
  th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
  th{color:var(--muted);font-weight:600;font-size:12.5px}
  .hint{font-size:12.5px;color:var(--muted)}
  .ok{color:var(--green)} .bad{color:var(--accent)}
  .pill{display:inline-block;font-size:12px;padding:2px 9px;border-radius:999px;border:1px solid var(--line)}
  .flash{background:rgba(54,211,153,.12);border:1px solid var(--green);color:var(--green);
        padding:10px 14px;border-radius:10px;margin-bottom:14px;font-size:14px}
  .flash.err{background:rgba(255,92,138,.12);border-color:var(--accent);color:var(--accent)}
  .row{display:flex;gap:14px;flex-wrap:wrap}.row>div{flex:1;min-width:160px}
  .credit-pill{display:inline-flex;align-items:center;gap:5px;font-weight:700;font-size:14px;
        background:rgba(255,207,107,.14);color:var(--gold);border:1px solid var(--gold);
        padding:6px 13px;border-radius:999px}
  .sub{color:var(--muted);font-size:14px;margin:0 0 12px}
  .navlink{font-size:14.5px;color:var(--soft);padding:6px 11px;border-radius:8px;display:inline-block}
  .navlink:hover{background:var(--inputbg);color:var(--text)}
  .appfoot{text-align:center;color:var(--muted);font-size:12.5px;margin-top:40px;padding-top:16px;border-top:1px solid var(--line)}