/* Copyright 2026 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

.mlc-scroll {
  color-scheme: light dark;

  --surface-bg: light-dark(#f3f3f3, #252526);
  --input-bg: light-dark(#fff, #3c3c3c);
  --button-bg: light-dark(#f3f3f3, #3c3c3c);
  --button-hover-bg: light-dark(#e0e0e0, #4a4a4a);
  --text-color: light-dark(#1e1e1e, #d4d4d4);
  --muted-color: light-dark(#6e6e6e, #888);
  --accent-color: light-dark(#0070c1, #9cdcfe);
  --border-subtle-color: light-dark(#d0d0d0, #444);
  --input-border-color: light-dark(#c8c8c8, #555);
  --match-bg: light-dark(rgb(255 200 0 / 0.35), rgb(255 200 0 / 0.25));
  --match-outline-color: light-dark(rgb(200 140 0 / 0.8), rgb(255 200 0 / 0.6));

  display: flex;
  flex-direction: column;
  border: 1px solid var(--border-subtle-color);
  border-radius: 3px;
  overflow: hidden;

  .mlc-load-sentinel {
    height: 0;
  }

  /* Row wrapper that sits between the toolbar and the scrollable content.
     Hosts the frozen line-number column and the actual scroll container. */
  .mlc-body {
    flex: 1;
    display: flex;
    flex-direction: row;
    min-height: 0;
    line-height: 1.8em;
  }

  /* The line-number column lives *outside* the scroll container so it is
     never affected by horizontal or vertical scroll. Its scrollTop is kept
     in sync with the adjacent scroll container via a JS scroll listener. */
  .mlc-line-nums-col {
    overflow: hidden;
    flex-shrink: 0;
    background: var(--surface-bg);
    border-inline-end: 1px solid var(--border-subtle-color);
  }

  .mlc-inner {
    flex: 1;
    overflow: auto;
    /* Disable scroll anchoring so manual scrollTop corrections aren't doubled. */
    overflow-anchor: none;
  }

  .mlc-goto-bar {
    position: sticky;
    top: 0;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 3px 4px;
    background: var(--surface-bg);
    border-bottom: 1px solid var(--border-subtle-color);
    z-index: 1;

    .mlc-search-group {
      display: flex;
      align-items: center;
      gap: 4px;
      flex-wrap: wrap;
    }

    .mlc-search-input,
    .mlc-goto {
      font: inherit;
      font-size: 0.85em;
      padding: 2px 6px;
      border: 1px solid var(--input-border-color);
      border-radius: 3px;
      background: var(--input-bg);
      color: var(--text-color);

      &:focus {
        outline: 2px solid var(--accent-color);
        outline-offset: 0;
      }

      &[aria-invalid="true"] {
        border-color: red;
      }
    }

    .mlc-search-input {
      width: 140px;
    }

    .mlc-goto {
      width: 110px;
      margin-inline-start: auto;
    }

    .mlc-nav-button {
      font: inherit;
      font-size: 0.85em;
      padding: 1px 6px;
      border: 1px solid var(--input-border-color);
      border-radius: 3px;
      background: var(--button-bg);
      color: var(--text-color);
      cursor: pointer;
      line-height: 1.4;

      &:hover:not(:disabled) {
        background: var(--button-hover-bg);
      }

      &:disabled {
        opacity: 0.4;
        cursor: default;
      }

      &[aria-pressed="true"] {
        background: var(--accent-color);
        color: light-dark(white, black);
        border-color: var(--accent-color);
      }
    }

    .mlc-match-info {
      font-size: 0.8em;
      color: var(--muted-color);
      white-space: nowrap;
      min-width: 4ch;
    }
  }

  .mlc-num-item {
    display: block;
    white-space: nowrap;
    min-width: var(--line-num-width, 3ch);
    padding-inline: 0.4em;
    text-align: right;
    font-family: monospace;
    font-size: 0.8em;
    color: var(--muted-color);
    user-select: none;
    height: 22px;
  }

  .mlc-num-item.mlc-match {
    background: var(--match-bg);
  }

  .mlc-match {
    background: var(--match-bg);
    outline: 1px solid var(--match-outline-color);
  }
}

@media (forced-colors: active) {
  .mlc-scroll {
    --surface-bg: Canvas;
    --input-bg: Field;
    --button-bg: ButtonFace;
    --button-hover-bg: Highlight;
    --text-color: CanvasText;
    --muted-color: GrayText;
    --accent-color: CanvasText;
    --border-subtle-color: ButtonBorder;
    --input-border-color: ButtonBorder;
    --match-bg: Mark;
    --match-outline-color: ButtonBorder;

    .mlc-search-input[aria-invalid="true"],
    .mlc-goto[aria-invalid="true"] {
      border-color: ButtonBorder;
    }
  }
}