body {
      min-height: 100vh;
      background: #0d1117;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: #e6edf3;
      line-height: 1.6;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      background:
        radial-gradient(ellipse 80% 60% at 20% 10%, rgba(0,150,255,.12) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 80% 90%, rgba(0,230,150,.09) 0%, transparent 55%);
      pointer-events: none;
      z-index: 0;
    }

    /* ── Nav ── */
    .top-nav {
      position: sticky;
      top: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 16px 32px;
      background: rgba(13,17,23,.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid #21262d;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .nav-logo {
      width: 36px; height: 36px;
      background: linear-gradient(135deg, #0096ff 0%, #00e676 100%);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
    }
    .nav-title {
      font-size: 18px;
      font-weight: 700;
      background: linear-gradient(90deg, #4fc3f7, #00e676);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .nav-links {
      display: flex;
      gap: 24px;
    }
    .nav-links a {
      color: #8b949e;
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color .2s;
    }
    .nav-links a:hover { color: #e6edf3; }

    /* ── Content ── */
    .content-wrap {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
      padding: 48px 24px 80px;
    }
    .page-title {
      font-size: 36px;
      font-weight: 800;
      margin-bottom: 8px;
      background: linear-gradient(90deg, #4fc3f7, #00e676);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .page-subtitle {
      font-size: 15px;
      color: #8b949e;
      margin-bottom: 40px;
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 320px;
      gap: 32px;
    }

    /* ── Form Card ── */
    .form-card {
      background: #161b22;
      border: 1px solid #30363d;
      border-radius: 12px;
      padding: 32px;
    }
    .form-card h2 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 24px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 20px;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: #c9d1d9;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      background: #0d1117;
      border: 1px solid #30363d;
      border-radius: 8px;
      padding: 12px 14px;
      font-size: 15px;
      color: #e6edf3;
      font-family: inherit;
      transition: border-color .2s;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: #00e676;
      box-shadow: 0 0 0 3px rgba(0,230,118,.15);
    }
    .form-group textarea {
      min-height: 140px;
      resize: vertical;
    }
    .form-group select {
      cursor: pointer;
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b949e' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 14px center;
      padding-right: 36px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, #00e676 0%, #00c853 100%);
      color: #0d1117;
      font-size: 15px;
      font-weight: 700;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      transition: transform .15s, box-shadow .15s;
    }
    .btn-submit:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 20px rgba(0,230,118,.35);
    }
    .btn-submit:active {
      transform: translateY(0);
    }

    /* ── Success ── */
    .success-box {
      background: #161b22;
      border: 1px solid #238636;
      border-radius: 12px;
      padding: 40px 32px;
      text-align: center;
    }
    .success-icon {
      font-size: 48px;
      margin-bottom: 16px;
    }
    .success-box h2 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #00e676;
    }
    .success-box p {
      color: #8b949e;
      font-size: 15px;
      margin-bottom: 24px;
    }
    .btn-back {
      display: inline-block;
      padding: 12px 28px;
      background: #21262d;
      color: #e6edf3;
      font-size: 14px;
      font-weight: 600;
      border: 1px solid #30363d;
      border-radius: 8px;
      text-decoration: none;
      transition: background .2s;
    }
    .btn-back:hover { background: #30363d; }

    /* ── Sidebar ── */
    .sidebar {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .info-card {
      background: #161b22;
      border: 1px solid #30363d;
      border-radius: 12px;
      padding: 24px;
    }
    .info-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #e6edf3;
    }
    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
    }
    .info-item:last-child { margin-bottom: 0; }
    .info-icon {
      font-size: 20px;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .info-text .label {
      font-size: 12px;
      color: #8b949e;
      text-transform: uppercase;
      letter-spacing: .5px;
      margin-bottom: 2px;
    }
    .info-text .value {
      font-size: 15px;
      color: #e6edf3;
    }
    .info-text a {
      color: #00e676;
      text-decoration: none;
    }
    .info-text a:hover {
      text-decoration: underline;
    }

    /* ── Footer ── */
    .footer {
      text-align: center;
      padding: 32px 24px;
      color: #484f58;
      font-size: 13px;
      border-top: 1px solid #21262d;
    }

    @media (max-width: 768px) {
      .top-nav { padding: 12px 16px; }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .content-wrap { padding: 32px 16px 60px; }
      .page-title { font-size: 28px; }
    }