@font-face {
      font-family: 'Noto Sans KR';
      font-style: normal;
      font-weight: 400;
      src: url(//fonts.gstatic.com/ea/notosanskr/v2/NotoSansKR-Regular.woff2) format('woff2'),
           url(//fonts.gstatic.com/ea/notosanskr/v2/NotoSansKR-Regular.woff) format('woff'),
           url(//fonts.gstatic.com/ea/notosanskr/v2/NotoSansKR-Regular.otf) format('opentype');
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Noto Sans KR', sans-serif;
      background: #f5f7fb;
    }

    a {
      text-decoration: none;
      color: #333;
    }

    #con {
      width: 100%;
      min-height: 100vh;
      background:
        radial-gradient(circle at 18% 18%, rgba(29, 32, 138, 0.16), transparent 28%),
        radial-gradient(circle at 82% 72%, rgba(255, 120, 80, 0.14), transparent 30%),
        linear-gradient(135deg, #f7f8fc 0%, #eef1f7 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px 16px;
      position: relative;
      overflow: hidden;
    }

    #con::before {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: rgba(255,255,255,0.55);
      top: -120px;
      right: -120px;
    }

    #con::after {
      content: "";
      position: absolute;
      width: 340px;
      height: 340px;
      border-radius: 50%;
      background: rgba(29,32,138,0.08);
      bottom: -100px;
      left: -80px;
    }

    #login {
      width: 100%;
      max-width: 460px;
      z-index: 1;
    }

    #login_form {
      width: 100%;
      padding: 38px 38px 30px;
      background: rgba(255, 255, 255, 0.94);
      border-radius: 24px;
      text-align: center;
      box-shadow:
        0 24px 60px rgba(24, 32, 79, 0.16),
        0 6px 18px rgba(24, 32, 79, 0.08),
        inset 0 1px 0 rgba(255,255,255,0.9);
      border: 1px solid rgba(255,255,255,0.75);
    }

    .login {
      margin: 0 0 10px;
      font-size: 24px;
      font-weight: 900;
      color: #20243a;
      letter-spacing: -1px;
    }

    .sub_title {
      margin: 0 0 18px;
      font-size: 12px;
      color: #8a90a3;
    }

    hr {
      margin: 22px 0;
      border: 0;
      height: 1px;
      background: linear-gradient(to right, transparent, #d9deea, transparent);
    }

    label {
      display: block;
      margin-bottom: 13px;
    }

    label p {
      margin: 0 0 7px;
      text-align: left;
      font-size: 12px;
      font-weight: 700;
      color: #5f6577;
    }

    .input {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      background: #f8f9fc;
      border: 1px solid #e0e4ee;
      border-radius: 12px;
      font-size: 14px;
      color: #222;
      outline: none;
      transition: all 0.18s ease;
      box-shadow: inset 0 2px 4px rgba(0,0,0,0.03);
    }

    .input:focus {
      border-color: #1D208A;
      background: #fff;
      box-shadow:
        0 0 0 4px rgba(29,32,138,0.10),
        inset 0 1px 2px rgba(0,0,0,0.02);
    }

    .id_row {
      display: flex;
      gap: 8px;
    }

    .id_row .input {
      flex: 1;
    }

    .duplication_btn {
      width: 76px;
      height: 44px;
      border: none;
      border-radius: 12px;
      background: #BABABA;
      color: #fff;
      font-size: 13px;
      font-weight: 800;
      cursor: pointer;
      transition: all 0.18s ease;
    }

    .duplication_btn:not(:disabled) {
      background: linear-gradient(135deg, #1D208A, #3539c9);
      box-shadow: 0 8px 18px rgba(29,32,138,0.22);
    }

    .duplication_btn:disabled {
      cursor: not-allowed;
      opacity: 0.7;
    }

    .create_btn {
      width: 100%;
      height: 48px;
      margin-top: 4px;
      border: none;
      border-radius: 14px;
      background: linear-gradient(135deg, #1D208A, #3539c9);
      color: #fff;
      font-size: 15px;
      font-weight: 900;
      cursor: pointer;
      transition: all 0.18s ease;
      box-shadow: 0 10px 22px rgba(29,32,138,0.28);
    }

    .create_btn:hover:not(:disabled) {
      transform: translateY(-1px);
      box-shadow: 0 14px 28px rgba(29,32,138,0.34);
    }

    .create_btn:disabled {
      background: #c8ccd6;
      color: #f1f1f1;
      cursor: not-allowed;
      box-shadow: none;
    }

    .find {
      margin: 18px 0 0;
      font-size: 12px;
      text-align: center;
    }

    .find a {
      color: #8a90a3;
    }

    .find a:hover {
      color: #1D208A;
    }

    @media (max-width: 480px) {
      #login_form {
        padding: 32px 24px 26px;
        border-radius: 20px;
      }

      .login {
        font-size: 22px;
      }

      .id_row {
        gap: 6px;
      }

      .duplication_btn {
        width: 70px;
      }
    }