:root{
    --bg:#0f1417;
    --bg-2:#141b1f;
    --panel:#1a2227;
    --panel-2:#212a30;
    --border:#2b363c;
    --gold:#e3ab3d;
    --gold-dim:#a67e2c;
    --gold-soft:rgba(227,171,61,.12);
    --red:#c1443a;
    --red-soft:rgba(193,68,58,.15);
    --green:#4f9d69;
    --green-soft:rgba(79,157,105,.15);
    --text:#eee8da;
    --text-dim:#93a3aa;
    --text-faint:#5f6e75;
    --radius:14px;
    --shadow: 0 10px 30px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;}
  body{
    background:
      radial-gradient(1100px 500px at 15% -10%, rgba(227,171,61,.07), transparent 60%),
      radial-gradient(900px 500px at 100% 0%, rgba(79,157,105,.06), transparent 55%),
      var(--bg);
    color:var(--text);
    font-family:'Be Vietnam Pro', sans-serif;
    min-height:100vh;
  }
/*  @media (prefers-reduced-motion: reduce){
    *{animation:none !important; transition:none !important;}
  } */

  .mono{font-family:'JetBrains Mono', monospace;}
  a{color:inherit;text-decoration:none;}
  button{font-family:inherit;cursor:pointer;}
  ::selection{background:var(--gold-soft);}

  /* ---------- utility ---------- */
  .hidden{display:none !important;}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:12px 22px;border-radius:10px;border:1px solid var(--border);
    background:var(--panel-2);color:var(--text);font-weight:700;font-size:14px;
    letter-spacing:.02em;transition:transform .15s ease, border-color .15s ease, background .15s ease;
  }
  .btn:hover{transform:translateY(-1px);border-color:var(--gold-dim);}
  .btn-primary{background:linear-gradient(180deg,#f0bc55,var(--gold));color:#231a08;border:1px solid var(--gold-dim);}
  .btn-primary:hover{filter:brightness(1.05);}
  .btn-ghost{background:transparent;}
  .btn-danger{border-color:var(--red);color:#ffd9d5;}
  .btn-block{width:100%;}
  .pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;}
  .pill-green{background:var(--green-soft);color:#8fe3ab;}
  .pill-red{background:var(--red-soft);color:#ffb3ac;}
  .pill-gold{background:var(--gold-soft);color:var(--gold);}

  /* ---------- topbar ---------- */
  .topbar{
    position:sticky;top:0;z-index:40;
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 28px;background:rgba(15,20,23,.85);backdrop-filter:blur(10px);
    border-bottom:1px solid var(--border);
  }
  .brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.03em;font-size:19px;}
  .brand .mark{
    width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(160deg,var(--gold),#8a5f1c);color:#1a1206;font-size:17px;font-weight:900;
    box-shadow:0 4px 14px rgba(227,171,61,.25);
  }
  .brand span.sub{color:var(--text-dim);font-weight:500;font-size:12px;letter-spacing:.08em;text-transform:uppercase;margin-left:2px;}
  .nav-tabs{display:flex;gap:4px;background:var(--panel);border:1px solid var(--border);padding:4px;border-radius:11px;}
  .nav-tabs button{
    background:transparent;border:none;color:var(--text-dim);padding:9px 16px;border-radius:8px;
    font-size:13.5px;font-weight:700;letter-spacing:.01em;transition:all .15s ease;
  }
  .nav-tabs button.active{background:var(--gold-soft);color:var(--gold);}
  .nav-tabs button:hover:not(.active){color:var(--text);}
  .user-box{display:flex;align-items:center;gap:14px;}
  .balance{
    display:flex;flex-direction:column;align-items:flex-end;line-height:1.2;
    padding:6px 14px;border:1px solid var(--border);border-radius:10px;background:var(--panel);
  }
  .balance .lbl{font-size:10px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.08em;}
  .balance .val{font-size:14.5px;font-weight:800;color:var(--green);}
  .avatar-chip{
    width:36px;height:36px;border-radius:50%;background:var(--panel-2);border:1px solid var(--border);
    display:flex;align-items:center;justify-content:center;font-weight:800;color:var(--gold);
  }

  main{max-width:1180px;margin:0 auto;padding:32px 28px 80px;}

  /* ---------- LOGIN ---------- */
  .login-wrap{
    min-height:calc(100vh - 0px);display:flex;align-items:center;justify-content:center;padding:24px;
  }
  .login-card{
    width:100%;max-width:400px;background:var(--panel);border:1px solid var(--border);
    border-radius:18px;padding:34px 32px 30px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  }
  .login-card::before{
    content:"";position:absolute;top:-60px;right:-60px;width:180px;height:180px;border-radius:50%;
    background:radial-gradient(circle, rgba(227,171,61,.18), transparent 70%);
  }
  .login-seal{
    width:56px;height:56px;margin:0 auto 14px;border-radius:50%;
    background:linear-gradient(160deg,var(--gold),#8a5f1c);
    display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:900;color:#1a1206;
    box-shadow:0 6px 20px rgba(227,171,61,.3);
  }
  .login-title{text-align:center;font-size:22px;font-weight:900;letter-spacing:.01em;margin:0 0 4px;}
  .login-sub{text-align:center;color:var(--text-dim);font-size:13px;margin:0 0 26px;}
  .field{margin-bottom:16px;}
  .field label{display:block;font-size:12px;font-weight:700;color:var(--text-dim);margin-bottom:6px;text-transform:uppercase;letter-spacing:.06em;}
  .field input{
    width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);
    background:var(--bg-2);color:var(--text);font-size:14px;outline:none;transition:border-color .15s ease;
  }
  .field input:focus{border-color:var(--gold-dim);}
  .login-foot{text-align:center;margin-top:18px;font-size:12.5px;color:var(--text-dim);}
  .login-foot b{color:var(--gold);font-weight:700;cursor:pointer;}
  .login-note{margin-top:14px;padding:10px 12px;background:var(--gold-soft);border:1px solid var(--gold-dim);border-radius:9px;font-size:12px;color:var(--gold);text-align:center;}

  /* ---------- HOME ---------- */
  .hero{
    display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:26px;
  }
  .hero h1{font-size:28px;margin:0 0 6px;font-weight:900;letter-spacing:.01em;}
  .hero p{margin:0;color:var(--text-dim);font-size:14px;max-width:520px;}
  .filters{
    display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px;padding:14px;
    background:var(--panel);border:1px solid var(--border);border-radius:12px;
  }
  .filters select, .filters input{
    background:var(--bg-2);border:1px solid var(--border);color:var(--text);
    padding:9px 12px;border-radius:8px;font-size:13px;font-family:inherit;
  }
  .filters .count{margin-left:auto;align-self:center;font-size:12.5px;color:var(--text-dim);}

  .grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:18px;}
  .card{
    position:relative;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);
    padding:18px;cursor:pointer;transition:transform .18s ease, border-color .18s ease, box-shadow .18s ease;
    overflow:hidden;
  }
  .card:hover{transform:translateY(-3px);border-color:var(--gold-dim);box-shadow:var(--shadow);}
  .card .ribbon{
    position:absolute;top:14px;left:-32px;transform:rotate(-45deg);
    background:var(--red);color:#fff;font-size:10px;font-weight:800;letter-spacing:.06em;
    padding:3px 36px;text-transform:uppercase;box-shadow:0 2px 6px rgba(0,0,0,.3);
  }
  .card-top{display:flex;align-items:center;gap:12px;margin-bottom:14px;}
  .class-badge{
    width:48px;height:48px;border-radius:12px;background:var(--panel-2);border:1px solid var(--border);
    display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;
  }
  .card-top .name{font-weight:800;font-size:15px;line-height:1.25;}
  .card-top .sub{font-size:11.5px;color:var(--text-dim);margin-top:2px;}
  .stat-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:14px;}
  .stat-chip{
    font-size:11px;padding:4px 9px;border-radius:7px;background:var(--bg-2);border:1px solid var(--border);color:var(--text-dim);
  }
  .card-foot{display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px dashed var(--border);}
  .price-seal{
    font-family:'JetBrains Mono',monospace;font-weight:700;font-size:15px;color:var(--gold);
  }
  .price-seal .d{font-size:10.5px;color:var(--text-faint);}
  .view-btn{font-size:12px;font-weight:700;color:var(--text-dim);}
  .card:hover .view-btn{color:var(--gold);}

  /* ---------- DETAIL ---------- */
  .back-link{display:inline-flex;align-items:center;gap:6px;color:var(--text-dim);font-size:13px;font-weight:700;margin-bottom:20px;}
  .back-link:hover{color:var(--gold);}
  .detail-grid{display:grid;grid-template-columns:1.1fr 1.4fr;gap:28px;}
  @media (max-width:820px){.detail-grid{grid-template-columns:1fr;}}
  .detail-visual{
    background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:30px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:14px;
    position:relative;min-height:340px;
  }
  .detail-visual .big-icon{
    width:110px;height:110px;border-radius:24px;background:linear-gradient(160deg,var(--panel-2),var(--bg-2));
    border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:52px;
  }
  .cert-stamp{
    position:absolute;top:22px;right:22px;width:76px;height:76px;border-radius:50%;
    border:2px dashed var(--gold-dim);display:flex;align-items:center;justify-content:center;
    transform:rotate(-12deg);color:var(--gold);font-size:9.5px;font-weight:800;text-align:center;
    letter-spacing:.04em;line-height:1.3;text-transform:uppercase;
  }
  .detail-info{background:var(--panel);border:1px solid var(--border);border-radius:18px;padding:28px;}
  .detail-info h2{margin:0 0 4px;font-size:23px;font-weight:900;}
  .detail-info .sv{color:var(--text-dim);font-size:13px;margin-bottom:18px;}
  .spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px;}
  .spec-item{background:var(--bg-2);border:1px solid var(--border);border-radius:10px;padding:11px 13px;}
  .spec-item .k{font-size:10.5px;color:var(--text-faint);text-transform:uppercase;letter-spacing:.06em;margin-bottom:3px;}
  .spec-item .v{font-size:14px;font-weight:700;}
  .desc{font-size:13.5px;line-height:1.7;color:var(--text-dim);margin-bottom:22px;}
  .price-box{
    display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-radius:12px;
    background:var(--gold-soft);border:1px solid var(--gold-dim);margin-bottom:18px;
  }
  .price-box .amount{font-family:'JetBrains Mono',monospace;font-weight:800;font-size:24px;color:var(--gold);}
  .price-box .label{font-size:11px;color:var(--text-dim);text-transform:uppercase;letter-spacing:.06em;}
  .action-row{display:flex;gap:10px;flex-wrap:wrap;}

  /* ---------- TOPUP ---------- */
  .page-title{font-size:24px;font-weight:900;margin:0 0 6px;}
  .page-sub{color:var(--text-dim);font-size:13.5px;margin:0 0 26px;}
  .topup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px;}
  @media (max-width:720px){.topup-grid{grid-template-columns:1fr;}}
  .method-card{
    background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:18px;cursor:pointer;
    transition:border-color .15s ease, transform .15s ease;
  }
  .method-card:hover{transform:translateY(-2px);}
  .method-card.selected{border-color:var(--gold);background:var(--gold-soft);}
  .method-card .icon{font-size:26px;margin-bottom:10px;}
  .method-card .m-name{font-weight:800;font-size:14.5px;margin-bottom:4px;}
  .method-card .m-desc{font-size:12px;color:var(--text-dim);}
  .topup-panel{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:26px;}
  .amount-row{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;}
  .amount-chip{
    padding:9px 16px;border-radius:9px;border:1px solid var(--border);background:var(--bg-2);
    font-size:13px;font-weight:700;font-family:'JetBrains Mono',monospace;
  }
  .amount-chip.active{border-color:var(--gold);color:var(--gold);background:var(--gold-soft);}
  .instructions{background:var(--bg-2);border:1px solid var(--border);border-radius:10px;padding:14px 16px;font-size:13px;color:var(--text-dim);margin:16px 0;line-height:1.7;}
  .instructions b{color:var(--text);}

  /* ---------- CONTACT ---------- */
  .contact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:28px;}
  @media (max-width:820px){.contact-grid{grid-template-columns:repeat(2,1fr);}}
  .contact-card{background:var(--panel);border:1px solid var(--border);border-radius:14px;padding:20px;text-align:center;transition:transform .15s ease,border-color .15s ease;}
  .contact-card:hover{transform:translateY(-2px);border-color:var(--gold-dim);}
  .contact-card .c-icon{font-size:28px;margin-bottom:10px;}
  .contact-card .c-name{font-weight:800;font-size:14px;margin-bottom:3px;}
  .contact-card .c-handle{font-size:12px;color:var(--text-dim);font-family:'JetBrains Mono',monospace;}
  .msg-panel{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:26px;}
  .msg-panel h3{margin:0 0 4px;font-size:16px;font-weight:800;}
  .msg-panel .msg-sub{color:var(--text-dim);font-size:12.5px;margin-bottom:18px;}
  textarea{
    width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--border);
    background:var(--bg-2);color:var(--text);font-size:14px;font-family:inherit;resize:vertical;min-height:90px;outline:none;
  }
  textarea:focus, .field input:focus{border-color:var(--gold-dim);}
  .msg-list{margin-top:20px;display:flex;flex-direction:column;gap:10px;}
  .msg-item{background:var(--bg-2);border:1px solid var(--border);border-radius:10px;padding:12px 14px;font-size:13px;}
  .msg-item .m-head{display:flex;justify-content:space-between;color:var(--text-faint);font-size:11px;margin-bottom:6px;}
  .empty{color:var(--text-faint);font-size:13px;text-align:center;padding:24px;}

  .toast{
    position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);
    background:var(--panel-2);border:1px solid var(--gold-dim);color:var(--text);
    padding:13px 22px;border-radius:11px;font-size:13.5px;font-weight:700;box-shadow:var(--shadow);
    opacity:0;pointer-events:none;transition:all .25s ease;z-index:80;
  }
  .toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

  @media (max-width:640px){
    .topbar{padding:12px 16px;flex-wrap:wrap;gap:10px;}
    .nav-tabs{order:3;width:100%;overflow-x:auto;}
    main{padding:22px 16px 60px;}
    .contact-grid{grid-template-columns:1fr;}
  }