/*
 * Forms
 * <div class="form-field">
 *   <label class="label">Email</label>
 *   <input class="input">
 *   <p class="form-hint">We'll never share it.</p>
 * </div>
 */
.form {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-1-5);
}

/* A group of radios/checkboxes as one field (<fieldset class="form-field"> + <legend class="label">):
   no browser border, and the legend spaced like a label (a legend isn't a flex item, so no gap) */
fieldset.form-field {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;

  > legend {
    margin-bottom: var(--space-1-5);
    padding: 0;
  }
}

.form-inline {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  flex-wrap: wrap;

  .form-field {
    flex: 1 1 14rem;
  }
}

.label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text);
}

.form-hint {
  font-size: var(--text-xs);
  color: var(--color-text-subtle);
}

.form-error {
  font-size: var(--text-xs);
  color: var(--color-danger-text);
}

.input,
.select,
.textarea {
  width: 100%;
  height: var(--control-height-md);
  padding: 0 var(--space-3);
  background: var(--color-surface);
  border: var(--border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: var(--text-sm);
  box-shadow: var(--shadow-xs);
  transition:
    border-color var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-fast) var(--ease-out);

  &::placeholder {
    color: var(--color-text-subtle);
  }

  &:hover {
    border-color: var(--color-text-disabled);
  }

  &:focus {
    outline: none;
    border-color: var(--color-focus);
    box-shadow: var(--focus-ring);
  }

  &:disabled {
    background: var(--color-surface-sunken);
    color: var(--color-text-disabled);
    cursor: not-allowed;
  }

  &[aria-invalid="true"] {
    border-color: var(--color-danger);
  }
}

.input--lg {
  height: var(--control-height-lg);
  font-size: var(--text-md);
}

/*
 * Date / datetime inputs. The calendar popup itself is drawn by the browser and
 * can't be styled; these rules cover the field (Chrome, Edge and Safari).
 */
.input[type="date"],
.input[type="datetime-local"] {
  /* Calendar icon: same chevron-style mask trick as .select::picker-icon, so it
     takes our colours instead of the browser's black/blue icon */
  &::-webkit-calendar-picker-indicator {
    width: 1.75rem;
    height: 1.75rem;
    margin-right: calc(var(--space-1) * -1);
    padding: 0;
    border-radius: var(--radius-sm);
    background: var(--color-text-subtle);
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill-rule='evenodd' d='M5.75 2a.75.75 0 0 1 .75.75V4h7V2.75a.75.75 0 0 1 1.5 0V4h.25A2.75 2.75 0 0 1 18 6.75v8.5A2.75 2.75 0 0 1 15.25 18H4.75A2.75 2.75 0 0 1 2 15.25v-8.5A2.75 2.75 0 0 1 4.75 4H5V2.75A.75.75 0 0 1 5.75 2Zm-1 5.5c-.69 0-1.25.56-1.25 1.25v6.5c0 .69.56 1.25 1.25 1.25h10.5c.69 0 1.25-.56 1.25-1.25v-6.5c0-.69-.56-1.25-1.25-1.25H4.75Z' clip-rule='evenodd'/%3E%3C/svg%3E") center / 1rem no-repeat;
    cursor: pointer;
    transition: background-color var(--duration-fast) var(--ease-out);
  }

  &:hover::-webkit-calendar-picker-indicator,
  &:focus::-webkit-calendar-picker-indicator {
    background: var(--color-primary);
  }

  /* Each part (day, month, hour…) highlights in teal instead of the default blue */
  &::-webkit-datetime-edit-day-field,
  &::-webkit-datetime-edit-month-field,
  &::-webkit-datetime-edit-year-field,
  &::-webkit-datetime-edit-hour-field,
  &::-webkit-datetime-edit-minute-field,
  &::-webkit-datetime-edit-ampm-field {
    padding: 0 var(--space-0-5);
    border-radius: var(--radius-xs);
  }

  &::-webkit-datetime-edit-day-field:focus,
  &::-webkit-datetime-edit-month-field:focus,
  &::-webkit-datetime-edit-year-field:focus,
  &::-webkit-datetime-edit-hour-field:focus,
  &::-webkit-datetime-edit-minute-field:focus,
  &::-webkit-datetime-edit-ampm-field:focus {
    background: var(--color-primary-subtle-hover);
    color: var(--color-primary-text);
  }

  /* The "/" and ":" between the parts */
  &::-webkit-datetime-edit-text {
    color: var(--color-text-subtle);
  }
}

.textarea {
  height: auto;
  min-height: 6rem;
  padding: var(--space-2) var(--space-3);
  resize: vertical;
}

/* Native select with a custom chevron */
.select {
  appearance: none;
  padding-right: var(--space-8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748b'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.17l3.71-3.94a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-2) center;
  background-size: 1.25rem;
  cursor: pointer;
}

.select--sm {
  width: auto;
  height: var(--control-height-sm);
  font-size: var(--text-xs);
}

/*
 * Customizable select: browsers that support appearance: base-select draw the
 * dropdown list in the page instead of using the OS menu, so it can follow our
 * tokens. Others (Safari, Firefox for now) keep the native select above.
 * Only on mouse/trackpad devices: phones keep their native wheel/sheet picker.
 */
@supports (appearance: base-select) {
  @media (hover: hover) and (pointer: fine) {
    /* The opt-in on its own: an unknown ::picker() would drop the whole rule */
    .select,
    .select::picker(select) {
      appearance: base-select;
    }

    .select {
      display: flex;
      align-items: center;
      padding-right: var(--space-2);
      background-image: none; /* ::picker-icon replaces the background chevron */
    }

    .select::picker-icon {
      content: "";
      width: 1.25rem;
      height: 1.25rem;
      margin-left: auto;
      background: var(--color-text-subtle);
      mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath fill-rule='evenodd' d='M5.23 7.21a.75.75 0 011.06.02L10 11.17l3.71-3.94a.75.75 0 111.08 1.04l-4.25 4.5a.75.75 0 01-1.08 0l-4.25-4.5a.75.75 0 01.02-1.06z' clip-rule='evenodd'/%3E%3C/svg%3E") center / contain no-repeat;
      transition: rotate var(--duration-normal) var(--ease-out);
    }

    .select:open::picker-icon {
      rotate: 180deg;
    }

    /* The dropdown panel */
    .select::picker(select) {
      max-height: 16rem;
      margin-block: var(--space-1);
      padding: var(--space-1);
      overflow-y: auto;
      background: var(--color-surface);
      border: var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
    }

    .select option {
      display: flex;
      align-items: center;
      gap: var(--space-2);
      padding: var(--space-1-5) var(--space-2);
      border-radius: var(--radius-sm);
      color: var(--color-text);
      cursor: pointer;

      &:hover,
      &:focus-visible {
        outline: none;
        background: var(--color-surface-hover);
      }

      &:checked {
        color: var(--color-primary-text);
        font-weight: var(--weight-medium);
      }

      &:disabled {
        color: var(--color-text-disabled);
        cursor: not-allowed;
      }

      /* Tick on the right of the selected option */
      &::checkmark {
        order: 1;
        margin-left: auto;
        color: var(--color-primary);
      }
    }

    @media (prefers-reduced-motion: no-preference) {
      .select::picker(select) {
        opacity: 0;
        translate: 0 -0.25rem;
        transition:
          opacity var(--duration-fast) var(--ease-out),
          translate var(--duration-fast) var(--ease-out),
          display var(--duration-fast) allow-discrete,
          overlay var(--duration-fast) allow-discrete;
      }

      .select:open::picker(select) {
        opacity: 1;
        translate: 0 0;
      }

      /* Where the opening animation starts from */
      @starting-style {
        .select:open::picker(select) {
          opacity: 0;
          translate: 0 -0.25rem;
        }
      }
    }
  }
}

/*
 * Search field: input with a magnifying glass on the left
 * <div class="search-field"><svg>…</svg><input class="input" type="search"></div>
 */
.search-field {
  position: relative;

  svg {
    position: absolute;
    top: 50%;
    left: var(--space-3);
    width: var(--icon-sm);
    height: var(--icon-sm);
    color: var(--color-text-subtle);
    translate: 0 -50%;
    pointer-events: none; /* clicks go through to the input */
  }

  .input {
    padding-left: calc(var(--space-3) + var(--icon-sm) + var(--space-2));
  }
}

/* Narrower input for short values (post code, CIF…) */
/* Codes and patterns ("[y]-[s]/[n]", "PK"): monospace so every character is clear */
.input--mono {
  font-family: var(--font-mono);
}

.input--short {
  max-width: 12rem;
}

/*
 * An input with a unit inside it, on the right: <div class="input-affix"><input class="input">
 * <span class="input-affix__suffix">%</span></div>. The unit is decoration (aria-hidden);
 * the label says what it is.
 */
.input-affix {
  position: relative;
  display: block;
  width: 100%;

  & .input {
    padding-right: calc(var(--space-3) + 1.25rem);
    text-align: right;
  }
}

.input-affix__suffix {
  position: absolute;
  top: 50%;
  right: var(--space-3);
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  pointer-events: none;
}