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HTML

            
              <h1>Under-Engineered Text Boxen</h1>

<form action="#" autocomplete="off" method="get" novalidate>
  <fieldset>
    <legend>Assorted Fields</legend>
    <div>
      <label for="blather">Text area:</label>
      <textarea id="blather" cols="20" rows="4">Lorem ipsum dolor sit amet.</textarea>
    </div>

    <div>
      <label for="name">Text Input:</label>
      <input type="text" id="name" value="Frank">
    </div>

    <div>
      <label for="berries">Datalist:</label>
      <input id="berries" type="text" list="berrylist" value="">
      <datalist id="berrylist">
        <option value="Blackberry">
        <option value="Blueberry">
        <option value="Boysenberry">
        <option value="Chuckberry">
        <option value="Cloudberry">
        <option value="Cranberry">
        <option value="Dewberry">
        <option value="Elderberry">
        <option value="Gooseberry">
        <option value="Huckleberry, I’ll be your">
        <option value="Lingonberry">
        <option value="Loganberry">
        <option value="Marionberry">
        <option value="Mulberry">
        <option value="Raspberry">
        <option value="Snozzberry">
        <option value="Strawberry">
        <option value="Thimbleberry">
        <option value="Wolfberry">
        <option value="Youngberry">
      </datalist>
    </div>
  </fieldset>
  
  <fieldset>
    <legend>Fields with Attributes</legend>
    <div>
      <label for="name-readonly">Read-only Text Input:</label>
      <input type="text" id="name-readonly" value="Phrank" readonly>
    </div>

    <div>
      <label for="name-required">Required Text Input:</label>
      <input type="text" id="name-required" value="" required>
    </div>

    <div>
      <label for="name-error">Errored Text Input:</label>
      <input type="text" id="name-error" value="Ed" aria-invalid="true">
    </div>

    <div>
      <label for="name-required-error">Errored Required Text Input:</label>
      <input type="text" id="name-required-error" value="" required aria-invalid="true">
    </div>
  </fieldset>
  
  <fieldset>
    <legend>Disabled Fields</legend>
    <div>
      <label for="mumble">Mumble:</label>
      <textarea id="mumble" cols="20" rows="4" disabled aria-disabled="true">Lorem ipsum dolor sit amet.</textarea>
    </div>

    <div>
      <label for="name2">Assigned Name:</label>
      <input type="text" id="name2" value="Still Frank" disabled aria-disabled="true">
    </div>
  </fieldset>
  
  <fieldset dir="rtl" lang="iw">
    <legend>שדות שונים</legend>
    <div>
      <label for="RTLblather">לקשט:</label>
      <textarea id="RTLblather" cols="20" rows="4">Lorem ipsum dolor לשבת אמט.</textarea>
    </div>

    <div>
      <label for="RTLname">שם פרטי:</label>
      <input type="text" id="RTLname" value="Frank" aria-invalid="true">
    </div>

    <div>
      <label for="RTLberries">ברי?</label>
      <input id="RTLberries" type="text" list="RTLberrylist" value="">
      <datalist id="RTLberrylist">
        <option value="Blackberry">
        <option value="Blueberry">
        <option value="Boysenberry">
        <option value="Chuckberry">
        <option value="Cloudberry">
        <option value="Cranberry">
        <option value="Dewberry">
        <option value="Elderberry">
        <option value="Gooseberry">
        <option value="Huckleberry, I’ll be your">
        <option value="Lingonberry">
        <option value="Loganberry">
        <option value="Marionberry">
        <option value="Mulberry">
        <option value="Raspberry">
        <option value="Snozzberry">
        <option value="Strawberry">
        <option value="Thimbleberry">
        <option value="Wolfberry">
        <option value="Youngberry">
      </datalist>
    </div>

    <div>
      <label for="RTLname-required">נדרש:</label>
      <input type="text" id="RTLname-required" value="" required>
    </div>
  </fieldset>
  
  <fieldset>
    <legend>Assorted Inputs</legend>
    <details>
      <summary>Show them all</summary>
      <div>
        <input type="button" value="button">
      </div>
      <div>
        <input type="checkbox" value="checkbox">
      </div>
      <div>
        <input type="color" value="color">
      </div>
      <div>
        <input type="date" value="date">
      </div>
      <div>
        <input type="datetime-local" value="datetime-local">
      </div>
      <div>
        <input type="email" value="email">
      </div>
      <div>
        <input type="file" value="file">
      </div>
      <div>
        <input type="hidden" value="hidden">
      </div>
      <div>
        <input type="image" value="image">
      </div>
      <div>
        <input type="month" value="month">
      </div>
      <div>
        <input type="number" value="number">
      </div>
      <div>
        <input type="password" value="password">
      </div>
      <div>
        <input type="radio" value="radio">
      </div>
      <div>
        <input type="range" value="range">
      </div>
      <div>
        <input type="reset" value="reset">
      </div>
      <div>
        <input type="search" value="search">
      </div>
      <div>
        <input type="submit" value="submit">
      </div>
      <div>
        <input type="tel" value="tel">
      </div>
      <div>
        <input type="text" value="text">
      </div>
      <div>
        <input type="time" value="time">
      </div>
      <div>
        <input type="url" value="url">
      </div>
      <div>
        <input type="week" value="week">
      </div>
      <div>
        <input type="datetime" value="datetime">
      </div>
    </details>
  </fieldset>
</form>
!

CSS

            
              body {
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto,
    Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  line-height: 1.4;
/*     line-height: 1.5; */
/*     letter-spacing: 0.12em; */
/*     word-spacing: 0.16em; */
/*     font-size: 200%; */
}

@media print {
  body {
    font-size: 8pt;
  }
}

/*-- forms --*/

form {
  background-color: #fff;
  padding: 0.5em 1em;
  display: grid;
  grid-template-columns: repeat(2, [col] 1fr );
}

fieldset {
  padding: 0 1em;
  margin: 0 0.5em 1em 0.5em;
}

fieldset:last-child {
  grid-column: span 2;
}

form details div {
  display: inline-block;
  margin: .25em;
}

details {
  margin: 1em 0;
}

summary {
  margin-bottom: 1em;
}

form div {
  box-sizing: border-box;
  margin: 1em 0;
}

label {
  display: block;
  margin: 0.25em 0;
}

/* Text fields */

textarea,
input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"]) {
  font: inherit;
  letter-spacing: inherit;
  word-spacing: inherit;
  border: 0.1em solid;
  padding: 0 0.2em;
}

/* Focus */

textarea:focus,
input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"]):focus {
  outline: 0.15em solid #00f;
  box-shadow: 0 0 0.2em #00f;
}

/* Read-only */

textarea[readonly],
input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[readonly] {
  border-color: rgba(0, 0, 0, 0.42);
  border-left: none;
  border-top: none;
  border-right: none;
}

/* Errored */

textarea[aria-invalid="true"],
textarea[aria-invalid="spelling"],
textarea[aria-invalid="grammar"],
input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[aria-invalid] {
  background: linear-gradient(135deg, rgba(255,0,0,1) 0, rgba(255,0,0,1) .4em, rgba(255,255,255,1) .4em);
}

/* RTL Errored */

*[dir="rtl"] textarea[aria-invalid="true"],
*[dir="rtl"] textarea[aria-invalid="spelling"],
*[dir="rtl"] textarea[aria-invalid="grammar"],
*[dir="rtl"] input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[aria-invalid] {
  background: linear-gradient(225deg, rgba(255,0,0,1) 0, rgba(255,0,0,1) .4em, rgba(255,255,255,1) .4em);
}

/* Required */

textarea[required],
input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[required] {
  border-left-width: 0.3em;
}

/* RTL Required */

*[dir="rtl"] textarea[required],
*[dir="rtl"] input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[required] {
  border-left-width: 0.1em;
  border-right-width: 0.3em;
}

/* Dark mode */

@media screen and (prefers-color-scheme: dark) {
  form {
    background-color: #000;
    color: #fff;
  }
  textarea,
  input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"]) {
    background-color: transparent;
    color: inherit;
    border-color: #ccc;
  }
  textarea:focus,
  input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"]):focus {
    outline-color: #0ff;
    box-shadow: 0 0 0.2em #0ff;
  }
  textarea:disabled,
  input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"]):disabled {
    border-color: rgba(255,255,255,.3);
    color: rgba(255,255,255,.3);
    background-color: rgba(255,255,255,.1);
  }
  textarea[readonly],
  input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[readonly] {
    border-color: #777;
  }
  textarea[aria-invalid],
  input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[aria-invalid] {
    background: linear-gradient(135deg, rgba(238,0,0,1) 0, rgba(238,0,0,1) .3em, rgba(0,0,0,0) .3em);
  }
  *[dir="rtl"] textarea[aria-invalid],
  *[dir="rtl"] input:not([type="checkbox"]):not([type="file"]):not([type="image"]):not([type="radio"]):not([type="range"])[aria-invalid] {
    background: linear-gradient(225deg, rgba(238,0,0,1) 0, rgba(238,0,0,1) .3em, rgba(0,0,0,0) .3em);
  }
}
!

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