:root{
      --bg:var(--mui-bg-subtle);
      --card:var(--mui-surface);
      --text:var(--mui-text-primary);
      --muted:var(--mui-text-secondary);
      --border:var(--mui-border-default);

      --primary:var(--mui-info-600);
      --primary-dark:var(--mui-info-700);
      --primary-soft:var(--mui-info-soft);

      --warn:var(--mui-warning-700);
      --warn-bg:var(--mui-warning-soft);

      --danger:var(--mui-danger-700);
      --danger-bg:var(--mui-danger-soft);

      --shadow:0 18px 45px rgba(15,23,42,.08);
      --radius:24px;
      --max:1100px;
    }

    *{
      box-sizing:border-box;
    }

    body{
      margin:0;
      font-family:Tahoma,Arial,sans-serif;
      background:
        radial-gradient(circle at top right, rgba(37,99,235,.08), transparent 24%),
        linear-gradient(180deg,var(--mui-bg-subtle) 0%,var(--bg) 100%);
      color:var(--text);
      line-height:2;
    }

    a{
      text-decoration:none;
      color:inherit;
    }

    .container{
      width:100%;
      max-width:var(--max);
      margin:auto;
      padding:0 16px;
    }

    /* =========================
       HEADER
    ========================= */

    .site-header{
      position:sticky;
      top:0;
      z-index:50;
      background:rgba(255,255,255,.88);
      backdrop-filter:blur(12px);
      border-bottom:1px solid rgba(226,232,240,.9);
    }

    .site-header .inner{
      min-height:78px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
    }

    .brand{
      display:flex;
      align-items:center;
      gap:12px;
    }

    .brand-badge{
      width:46px;
      height:46px;
      border-radius:16px;
      background:linear-gradient(135deg,var(--primary),var(--mui-info-600));
      color:var(--mui-surface);
      display:grid;
      place-items:center;
      font-weight:900;
      font-size:20px;
      box-shadow:0 12px 25px rgba(37,99,235,.25);
    }

    .brand-text strong{
      display:block;
      font-size:20px;
      color:var(--mui-text-primary);
    }

    .brand-text span{
      display:block;
      color:var(--muted);
      font-size:13px;
    }

    .nav{
      display:flex;
      align-items:center;
      gap:10px;
      flex-wrap:wrap;
    }

    .nav a{
      padding:10px 16px;
      border-radius:999px;
      color:var(--muted);
      font-size:14px;
      font-weight:800;
      transition:.2s ease;
    }

    .nav a:hover{
      background:var(--mui-surface);
      color:var(--mui-text-primary);
      box-shadow:0 8px 18px rgba(15,23,42,.06);
    }

    .nav .active{
      background:var(--primary);
      color:var(--mui-surface);
    }

    .nav .active:hover{
      background:var(--primary-dark);
      color:var(--mui-surface);
    }

    /* =========================
       PAGE
    ========================= */

    .page{
      padding:38px 0 70px;
    }

    .layout{
      display:grid;
      grid-template-columns:320px 1fr;
      gap:22px;
      align-items:start;
    }

    .card{
      background:var(--card);
      border:1px solid var(--border);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
    }

    /* =========================
       LEFT BLUE CARD
    ========================= */

    .side-card{
      background:
        radial-gradient(circle at top left, rgba(255,255,255,.18), transparent 26%),
        linear-gradient(135deg,var(--mui-info-600),var(--mui-info-600));
      color:var(--mui-surface);
      padding:28px;
      position:sticky;
      top:110px;
      overflow:hidden;
    }

    .side-card h2{
      margin:0 0 22px;
      font-size:34px;
      line-height:1.4;
      color:var(--mui-surface);
    }

    .side-list{
      display:flex;
      flex-direction:column;
      gap:14px;
    }

    .side-item{
      background:rgba(255,255,255,.10);
      border:1px solid rgba(255,255,255,.16);
      border-radius:18px;
      padding:18px;
      font-size:15px;
      font-weight:700;
      line-height:1.9;
      backdrop-filter:blur(8px);
    }

    /* =========================
       MAIN CONTENT
    ========================= */

    .main-card{
      overflow:hidden;
    }

    .hero{
      padding:34px;
      border-bottom:1px solid var(--border);
      background:linear-gradient(180deg,var(--mui-surface) 0%,var(--mui-bg-subtle) 100%);
    }

    .hero-badge{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding:10px 16px;
      border-radius:999px;
      background:var(--primary-soft);
      border:1px solid var(--mui-info-100);
      color:var(--primary-dark);
      font-size:13px;
      font-weight:800;
      margin-bottom:18px;
    }

    h1{
      margin:0 0 14px;
      font-size:54px;
      line-height:1.2;
      color:var(--mui-text-primary);
      font-weight:900;
    }

    .hero p{
      margin:0;
      color:var(--muted);
      font-size:17px;
      line-height:2.1;
    }

    .notice{
      margin-top:24px;
      background:var(--primary-soft);
      border:1px solid var(--mui-info-100);
      border-right:4px solid var(--primary);
      border-radius:18px;
      padding:18px;
      color:var(--mui-info-700);
      font-size:15px;
      line-height:2;
      font-weight:700;
    }

    .content{
      padding:0 34px 34px;
    }

    .section{
      padding:34px 0;
      border-bottom:1px solid var(--mui-bg-subtle);
    }

    .section:last-child{
      border-bottom:none;
      padding-bottom:10px;
    }

    .section h2{
      margin:0 0 16px;
      font-size:42px;
      line-height:1.4;
      color:var(--mui-text-primary);
      font-weight:900;
    }

    .section p{
      margin:0 0 18px;
      color:var(--mui-text-primary);
      font-size:17px;
      line-height:2.1;
    }

    .section ul{
      margin:0;
      padding-right:22px;
    }

    .section li{
      margin-bottom:12px;
      color:var(--mui-text-secondary);
      font-size:16px;
      line-height:2;
    }

    .warning{
      margin-top:22px;
      background:var(--warn-bg);
      border:1px solid var(--mui-warning-100);
      border-right:4px solid var(--warn);
      border-radius:18px;
      padding:18px;
      color:var(--mui-warning-700);
      font-size:15px;
      line-height:2;
      font-weight:700;
    }

    .danger{
      margin-top:22px;
      background:var(--danger-bg);
      border:1px solid var(--mui-danger-100);
      border-right:4px solid var(--danger);
      border-radius:18px;
      padding:18px;
      color:var(--mui-danger-700);
      font-size:15px;
      line-height:2;
      font-weight:700;
    }

    /* =========================
       FOOTER
    ========================= */

    .footer{
      margin-top:26px;
      padding-top:22px;
      border-top:1px solid var(--border);

      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;

      color:var(--muted);
      font-size:14px;
    }

    .footer-links{
      display:flex;
      gap:10px;
      flex-wrap:wrap;
    }

    .footer-links a{
      color:var(--muted);
      transition:.2s;
    }

    .footer-links a:hover{
      color:var(--primary);
    }

    /* =========================
       MOBILE
    ========================= */

    @media(max-width:950px){

      .layout{
        grid-template-columns:1fr;
      }

      .side-card{
        position:relative;
        top:0;
      }

      h1{
        font-size:40px;
      }

      .section h2{
        font-size:30px;
      }
    }

    @media(max-width:700px){

      .hero,
      .content{
        padding-inline:22px;
      }

      h1{
        font-size:34px;
      }

      .site-header .inner{
        justify-content:center;
        text-align:center;
      }

      .brand{
        justify-content:center;
      }

      .footer{
        flex-direction:column;
        align-items:flex-start;
      }
    }