/* 中学生が迷いにくいように、余白を広めにして読みやすくしています。 */
:root {
  --ink: #172026;
  --muted: #5c6872;
  --line: #d7dde4;
  --paper: #ffffff;
  --soft: #f4f7f8;
  --top: #dff3ee;
  --accent: #0f7f72;
  --accent-dark: #0a5d54;
  --input-line: #ff8a00;
  --input-glow: rgba(255, 138, 0, 0.24);
  --download-line: #2f6fed;
  --download-dark: #1d4fb8;
  --download-glow: rgba(47, 111, 237, 0.22);
  --warn-bg: #fff7df;
  --warn-line: #e3b84e;
  --error-bg: #fff0f0;
  --error-line: #d65d5d;
  --block-event: #ffbf45;
  --block-control: #ffab3d;
  --block-motion: #4d8df7;
  --block-look: #8b63d9;
  --block-extension: #138a78;
}

/* 画面全体の基本設定です。 */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--soft);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

button,
input,
select,
textarea {
  font: inherit;
}

code,
pre,
textarea {
  font-family: "Consolas", "Yu Gothic UI", monospace;
}

.page-width {
  width: min(1160px, calc(100% - 32px));
  margin-inline: auto;
}

/* 上部は、このサイトでできることと使い方をすぐ見せます。 */
.top-band {
  background: var(--top);
  border-bottom: 1px solid var(--line);
  padding: 28px 0;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 440px);
  gap: 24px;
  align-items: start;
}

.eyebrow,
.panel-kicker {
  margin: 0 0 6px;
  color: var(--accent-dark);
  font-weight: 700;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3.2rem);
  letter-spacing: 0;
  line-height: 1.1;
}

h2,
h3 {
  margin: 0 0 12px;
  letter-spacing: 0;
  line-height: 1.25;
}

.lead {
  max-width: 660px;
  margin: 0;
  font-size: 1.12rem;
}

.text-link {
  color: var(--accent-dark);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.text-link:hover {
  color: var(--accent);
}

.strong-link {
  font-size: 1.08em;
}

.stretch3-link-box {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
}

.stretch3-link-box p {
  margin: 0;
  font-weight: 750;
}

.cat-link {
  display: inline-flex;
  width: 126px;
  min-width: 126px;
  border: 3px solid var(--block-event);
  border-radius: 12px;
  background: #fff7df;
  box-shadow: 0 0 0 4px rgba(255, 191, 69, 0.22);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.cat-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 0 5px rgba(255, 191, 69, 0.34);
}

.cat-link img {
  display: block;
  width: 100%;
  height: auto;
}

.guide-panel,
.tool-panel,
.result-panel,
.prompt-panel,
.help-panel,
.json-panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.guide-panel {
  padding: 20px;
}

.steps {
  margin: 0;
  padding-left: 1.4rem;
  font-weight: 650;
}

.steps li + li {
  margin-top: 7px;
}

/* Chromebookの保存場所説明は目に入りやすい帯にしています。 */
.notice-band {
  margin-top: 20px;
  padding: 14px 18px;
  background: #eef8ff;
  border: 1px solid #a7cbe2;
  border-radius: 8px;
}

.notice-band p {
  margin: 4px 0;
  font-weight: 650;
}

/* 入力とプレビューは横に並べ、狭い画面では縦にします。 */
.workspace-band {
  padding: 22px 0;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: 18px;
  align-items: stretch;
}

.tool-panel,
.prompt-panel,
.help-panel,
.json-panel,
.result-panel {
  padding: 18px;
}

/* いちばん大事な入力エリアは、太い色つき枠で主役だと分かるようにします。 */
.workspace-grid > .tool-panel:first-child {
  border: 3px solid var(--input-line);
  box-shadow: 0 0 0 4px var(--input-glow);
}

.workspace-grid > .tool-panel:first-child:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 5px rgba(15, 127, 114, 0.24);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
  margin-bottom: 12px;
}

.source-editor {
  display: flex;
  width: 100%;
  border: 4px solid var(--input-line);
  border-radius: 8px;
  background: #fffdf7;
  box-shadow: inset 0 0 0 1px rgba(255, 138, 0, 0.22);
  overflow: hidden;
}

.source-editor:focus-within {
  border-color: var(--accent);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(15, 127, 114, 0.18), inset 0 0 0 1px rgba(15, 127, 114, 0.18);
}

.source-editor.has-error {
  border-color: var(--error-line);
  background: #fff8f8;
  box-shadow: 0 0 0 5px rgba(214, 93, 93, 0.2);
}

.line-numbers {
  min-width: 46px;
  padding: 14px 8px;
  border-right: 2px solid rgba(255, 138, 0, 0.35);
  background: #fff3d9;
  color: #7a5a1f;
  font-family: "Consolas", "Yu Gothic UI", monospace;
  font-size: 0.98rem;
  line-height: 1.5;
  text-align: right;
  user-select: none;
  overflow: hidden;
}

.line-numbers span {
  display: block;
  min-height: 1.5em;
}

.line-numbers span.error-line-number {
  margin-inline: -4px;
  border-radius: 5px;
  background: var(--error-line);
  color: #fff;
  font-weight: 800;
}

#sourceInput {
  width: 100%;
  min-height: 430px;
  resize: vertical;
  border: 0;
  border-radius: 0;
  padding: 14px;
  background: transparent;
  color: var(--ink);
  font-size: 0.98rem;
  line-height: 1.5;
  outline: none;
}

#sampleSelect,
#fileNameInput {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 0 12px;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

button {
  min-height: 44px;
  border-radius: 8px;
  border: 1px solid transparent;
  padding: 0 16px;
  cursor: pointer;
  font-weight: 750;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.primary-button {
  background: var(--accent);
  color: #fff;
}

.primary-button:hover:not(:disabled) {
  background: var(--accent-dark);
}

.ghost-button {
  background: #fff;
  color: var(--accent-dark);
  border-color: var(--line);
}

.ghost-button:hover {
  border-color: var(--accent);
}

/* Scratchのブロックらしさを、人間が読める形で出しています。 */
.preview-output {
  min-height: 430px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbfc;
  padding: 14px;
  overflow: auto;
}

.script-preview {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.preview-line {
  display: flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 10px;
  border-radius: 7px;
  color: #fff;
  font-weight: 700;
  word-break: break-word;
}

.preview-event {
  background: var(--block-event);
  color: #3b2600;
}

.preview-control {
  background: var(--block-control);
  color: #3b2600;
}

.preview-motion {
  background: var(--block-motion);
}

.preview-look {
  background: var(--block-look);
}

.preview-extension {
  background: var(--block-extension);
}

.preview-basic {
  background: #5e6c7a;
}

/* 結果エリアは、成功とエラーをすぐ見分けられるようにしています。 */
.result-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 22px;
}

.status-box,
.warning-box,
.error-box {
  border-radius: 8px;
  padding: 12px;
  white-space: pre-wrap;
}

.status-box {
  background: #eef8f4;
  border: 1px solid #9ed2c4;
}

.status-box.idle {
  background: #f6f7f8;
  border-color: var(--line);
}

.warning-box {
  margin-top: 10px;
  background: var(--warn-bg);
  border: 1px solid var(--warn-line);
}

.error-box {
  background: var(--error-bg);
  border: 1px solid var(--error-line);
}

.error-title {
  margin: 0 0 8px;
  color: #9b1c1c;
  font-weight: 850;
}

.error-location {
  margin: 0 0 10px;
  font-weight: 800;
}

.error-detail {
  margin: 0 0 8px;
}

.error-snippet {
  margin: 10px 0;
  padding: 10px;
  border: 2px solid var(--error-line);
  border-radius: 8px;
  background: #fffafa;
  color: #9b1c1c;
  font-family: "Consolas", "Yu Gothic UI", monospace;
  font-weight: 800;
  overflow-x: auto;
  white-space: pre;
}

.error-code-line {
  display: block;
}

.error-caret-line {
  display: block;
  color: var(--error-line);
}

.hint-text {
  color: var(--muted);
  margin-bottom: 0;
}

.download-panel {
  display: grid;
  gap: 10px;
  border: 3px solid var(--download-line);
  background: #f7fbff;
  box-shadow: 0 0 0 4px var(--download-glow);
}

.download-panel:focus-within {
  border-color: var(--download-dark);
  box-shadow: 0 0 0 5px rgba(29, 79, 184, 0.24);
}

#downloadButton {
  background: var(--download-line);
  color: #fff;
  box-shadow: 0 3px 0 var(--download-dark);
}

#downloadButton:hover:not(:disabled) {
  background: var(--download-dark);
}

#downloadButton:disabled {
  background: #9ab4df;
  box-shadow: none;
}

#fileNameInput:focus {
  border-color: var(--download-line);
  outline: none;
  box-shadow: 0 0 0 3px var(--download-glow);
}

.file-label {
  font-weight: 700;
}

.prompt-panel,
.help-panel,
.json-panel {
  margin-bottom: 22px;
}

#geminiPrompt {
  width: 100%;
  min-height: 150px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfd;
}

.copy-status {
  min-height: 1.5rem;
  margin: 8px 0 0;
  color: var(--accent-dark);
  font-weight: 700;
}

.help-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 18px;
}

pre {
  margin: 0;
  overflow: auto;
  background: #111820;
  color: #f7fbff;
  border-radius: 8px;
  padding: 14px;
}

.help-panel ul {
  margin: 0;
  padding-left: 1.2rem;
}

.json-panel summary {
  cursor: pointer;
  font-weight: 800;
}

#jsonOutput {
  margin-top: 12px;
  max-height: 420px;
}

#validationOutput {
  margin-top: 12px;
  margin-bottom: 16px;
  max-height: 360px;
}

.analyzer-controls {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.analyzer-controls label {
  font-weight: 800;
}

#sb3AnalyzeInput {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px;
}

#extensionAnalysisOutput {
  max-height: 520px;
}

/* Chromebookの小さい画面でも押しやすく、読みやすくします。 */
@media (max-width: 900px) {
  .hero-grid,
  .workspace-grid,
  .result-grid,
  .help-grid {
    grid-template-columns: 1fr;
  }

  .panel-head {
    flex-direction: column;
  }

  #sourceInput,
  .source-editor,
  .preview-output {
    min-height: 360px;
  }
}

@media (max-width: 560px) {
  .page-width {
    width: min(100% - 20px, 1160px);
  }

  .top-band {
    padding: 20px 0;
  }

  .stretch3-link-box {
    align-items: flex-start;
    flex-direction: column;
  }

  .tool-panel,
  .prompt-panel,
  .help-panel,
  .json-panel,
  .result-panel {
    padding: 14px;
  }

  button,
  #sampleSelect,
  #fileNameInput {
    width: 100%;
  }
}