:root {
  --bg: #f4f7fb;
  --card: #ffffff;
  --ink: #10233a;
  --muted: #4f6178;
  --line: #ced8e5;
  --accent: #00796b;
  --accent-2: #0f4c81;
  --ok: #136f3a;
  --bad: #a61b1b;
  --editor: #0f172a;
  --editor-ink: #d8e8ff;
  --text-line-height: 1.6;
  --text-letter-spacing: 0;
  --text-word-spacing: 0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--ink);
  line-height: var(--text-line-height);
  letter-spacing: var(--text-letter-spacing);
  word-spacing: var(--text-word-spacing);
  background:
    radial-gradient(circle at 12% 8%, #dff6f2 0%, transparent 28%),
    radial-gradient(circle at 88% 5%, #e1eefb 0%, transparent 32%),
    var(--bg);
}

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.2rem;
  display: grid;
  gap: 1rem;
}

.hero {
  background: linear-gradient(120deg, #0a6f63, #0d5f93);
  color: #f7fffe;
  border-radius: 16px;
  padding: 1.1rem 1.2rem;
  box-shadow: 0 10px 24px rgba(13, 95, 147, 0.24);
}

.hero h1 {
  margin: 0.2rem 0 0.4rem;
  font-size: 1.8rem;
}

.hero-meta {
  margin-top: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.pill {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 999px;
  padding: 0.38rem 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.reading-age-control label {
  font-size: 0.82rem;
  font-weight: 700;
}

.reading-age-control select {
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.95);
  padding: 0.22rem 0.48rem;
  font-size: 0.82rem;
}

.kicker {
  margin: 0;
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  box-shadow: 0 8px 20px rgba(16, 35, 58, 0.08);
}

h2 {
  margin: 0 0 0.45rem;
}

.intro {
  margin: 0 0 0.85rem;
  color: var(--muted);
}

.predict-task {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem;
  margin-top: 0.85rem;
}

.predict-task h3 {
  margin: 0 0 0.55rem;
  font-size: 1.04rem;
}

.predict-layout,
.modify-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.mini-editor,
.mini-console {
  border: 1px solid var(--line);
  border-radius: 10px;
  overflow: hidden;
  background: #fbfdff;
}

.panel-title {
  padding: 0.48rem 0.62rem;
  font-size: 0.82rem;
  font-weight: 700;
  background: linear-gradient(180deg, #eef3f9, #e2ebf6);
  border-bottom: 1px solid var(--line);
}

.code,
.console,
#modifyEditor {
  margin: 0;
  padding: 0.75rem;
  min-height: 170px;
  font-family: "JetBrains Mono", "Cascadia Code", monospace;
  font-size: 0.92rem;
  line-height: 1.48;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  overflow-x: hidden;
  overflow-y: auto;
}

#modifyConsole {
  min-height: 220px;
}

.code,
#modifyEditor {
  background: var(--editor);
  color: var(--editor-ink);
}

.console {
  background: #0e2238;
  color: #bcead8;
}

#modifyEditor {
  width: 100%;
  border: 0;
  resize: vertical;
  min-height: 220px;
  outline: none;
  position: relative;
  z-index: 2;
  color: transparent;
  caret-color: #e2e8f0;
  background: transparent;
}

.modify-editor-shell {
  display: grid;
  grid-template-columns: 3rem 1fr;
  grid-template-rows: 1fr;
  min-height: 220px;
  background: var(--editor);
}

.modify-line-numbers {
  margin: 0;
  padding: 0.75rem 0.45rem;
  border-right: 1px solid #273548;
  color: #7d94b2;
  text-align: right;
  font-family: "JetBrains Mono", "Cascadia Code", monospace;
  font-size: 0.92rem;
  line-height: 1.48;
  white-space: pre;
  overflow: hidden;
}

.modify-highlight {
  grid-column: 2;
  grid-row: 1;
  margin: 0;
  padding: 0.75rem;
  min-height: 220px;
  color: var(--editor-ink);
  font-family: "JetBrains Mono", "Cascadia Code", monospace;
  font-size: 0.92rem;
  line-height: 1.48;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
  pointer-events: none;
  overflow: hidden;
}

.modify-editor-shell #modifyEditor {
  grid-column: 2;
  grid-row: 1;
}

.py-keyword { color: #f472b6; }
.py-number { color: #f59e0b; }
.py-string { color: #34d399; }
.py-comment { color: #93a4bd; font-style: italic; }

.choices {
  border: 0;
  margin: 0.65rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.choices label {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  background: #f7fbff;
  border: 1px solid #d3e0ef;
  border-radius: 10px;
  padding: 0.55rem;
}

.choices label.choice-correct {
  background: #dcfce7;
  border-color: #15803d;
}

.choices label.choice-selected-wrong {
  background: #fee2e2;
  border-color: #b91c1c;
}

.controls {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

button,
.ide-link {
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  cursor: pointer;
  padding: 0.52rem 0.78rem;
  text-decoration: none;
  font-size: 0.9rem;
}

button:hover,
.ide-link:hover {
  filter: brightness(1.08);
}

.predict-task [data-run]:disabled {
  background: repeating-linear-gradient(
    -45deg,
    #8b95a5,
    #8b95a5 10px,
    #a3acba 10px,
    #a3acba 20px
  );
  color: #eef2f7;
  border: 2px dashed #64748b;
  cursor: not-allowed;
  filter: none;
  opacity: 1;
}

.feedback {
  margin: 0;
  font-weight: 700;
}

.feedback.ok {
  color: var(--ok);
}

.feedback.bad {
  color: var(--bad);
}

.parsons-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.8rem;
}

.drop-zone {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f7fbff;
  min-height: 300px;
  padding: 0.55rem;
}

.drop-zone h3 {
  margin: 0.2rem 0 0.6rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.drop-zone.target {
  border: 2px dashed #8db9d8;
}

.drop-zone.over {
  background: #e8f6ff;
  border-color: #1b86cf;
}

.parsons-block {
  margin: 0.45rem 0;
  padding: 0.55rem;
  border: 1px solid #9db1c6;
  border-radius: 8px;
  background: #fff;
  font-family: "JetBrains Mono", "Cascadia Code", monospace;
  font-size: 0.9rem;
  cursor: grab;
  white-space: pre;
}

.parsons-block:active {
  cursor: grabbing;
}

.challenge {
  margin: 0 0 0.75rem;
  padding: 0.65rem;
  border-left: 4px solid var(--accent-2);
  background: #eff6ff;
}

.ide-frame {
  width: 100%;
  height: 1700px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  display: block;
  overflow: hidden;
}

.make-actions {
  margin-bottom: 0.7rem;
}

@media (max-width: 860px) {
  .predict-layout,
  .modify-grid,
  .parsons-grid {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 1.4rem;
  }

  .ide-frame {
    height: 1500px;
  }
}

body[data-sensory="dyslexia-friendly"] {
  --text-line-height: 1.85;
  --text-letter-spacing: 0.015em;
  --text-word-spacing: 0.08em;
  font-family: "Verdana", "Tahoma", sans-serif;
}

body[data-sensory="high-contrast"] {
  --ink: #ffffff;
  --muted: #f4f4f4;
  --bg: #000000;
  --card: #111111;
  --line: #ffffff;
  --accent: #ffcc00;
  --accent-2: #00e5ff;
  --editor: #000000;
  --editor-ink: #ffffff;
}

body[data-sensory="high-contrast"] .console {
  background: #000000;
  color: #ffffff;
}

body[data-sensory="high-contrast"] .panel-title {
  background: #000000;
  color: #ffffff;
  border-bottom-color: #ffffff;
}

body[data-sensory="high-contrast"] .predict-task h3,
body[data-sensory="high-contrast"] .drop-zone h3 {
  color: #ffffff;
}

body[data-sensory="high-contrast"] .choices label {
  background: #000000;
  color: #ffffff;
  border-color: #ffffff;
}

body[data-sensory="high-contrast"] .choices input[type="radio"] {
  accent-color: #ffcc00;
}

body[data-sensory="high-contrast"] .choices label.choice-correct {
  background: #003300;
  border-color: #00ff66;
}

body[data-sensory="high-contrast"] .choices label.choice-selected-wrong {
  background: #330000;
  border-color: #ff6666;
}

body[data-sensory="high-contrast"] .drop-zone {
  background: #000000;
  border-color: #ffffff;
}

body[data-sensory="high-contrast"] .drop-zone.target {
  border-color: #ffcc00;
}

body[data-sensory="high-contrast"] .drop-zone.over {
  background: #111111;
  border-color: #00e5ff;
}

body[data-sensory="high-contrast"] .parsons-block {
  background: #000000;
  color: #ffffff;
  border-color: #ffffff;
}

body[data-sensory="high-contrast"] #parsonsFeedback {
  color: #ffffff;
}

body[data-sensory="low-sensory"] {
  --bg: #edf2f5;
  --card: #f9fcff;
  --accent: #1f6b86;
  --accent-2: #2f5d79;
}

body[data-sensory="low-sensory"] * {
  transition: none !important;
}

body[data-reading-age="9-11"] {
  font-size: 1.04rem;
}

body[data-reading-age="15-16"] {
  font-size: 0.97rem;
}