/*
 * lessons/metals-non-metals/practice/practice.css
 *
 * Colour values copied verbatim from design/shell.css's .tl-root tokens (the
 * same "Electricity-based app styling" every metals-non-metals lesson
 * already uses) so this page looks like part of the same chapter. Declared
 * locally under .mnp-root rather than reusing .tl-root itself: that class
 * also carries a fixed 3-row grid + position:absolute layout built for the
 * orchestrator-driven lesson stage, which is the wrong shape for this
 * page's plain scrolling content — only the colours are shared, not the
 * structural rules.
 */

.mnp-root {
  --tl-bg: #124F40;
  --tl-surface: #185E4C;
  --tl-border: #397565;
  --tl-mint: #A9E8CF;
  --tl-cream: #FFF6D8;
  --tl-text: #F7FAF8;
  --tl-secondary: #C5D8D1;
  --tl-wrong: #e3897a;

  min-height: 100vh;
  background: var(--tl-bg);
  color: var(--tl-text);
  font-family: 'Manrope', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

.mnp-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--tl-border);
  position: sticky;
  top: 0;
  background: var(--tl-bg);
  z-index: 5;
}
.mnp-topbar a { color: var(--tl-mint); text-decoration: none; font-weight: 700; }
.mnp-topbar a:hover { text-decoration: underline; }
.mnp-topbar span { color: var(--tl-secondary); font-size: 0.9rem; }

.mnp-main { max-width: 780px; margin: 0 auto; padding: 24px 20px 80px; }

.mnp-eyebrow { color: var(--tl-mint); font-weight: 800; text-transform: uppercase; font-size: 0.72rem; letter-spacing: 0.04em; margin: 0 0 6px; }
.mnp-heading h1 { margin: 0 0 10px; font-size: clamp(1.4rem, 5vw, 2rem); font-weight: 800; }
.mnp-heading p:not(.mnp-eyebrow) { color: var(--tl-secondary); line-height: 1.5; margin: 0 0 6px; }

.mnp-toc { margin: 20px 0 28px; padding: 14px 16px; background: var(--tl-surface); border: 1px solid var(--tl-border); border-radius: 12px; }
.mnp-toc p { margin: 0 0 8px; color: var(--tl-secondary); font-weight: 700; font-size: 0.85rem; }
.mnp-toc ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.mnp-toc a { color: var(--tl-mint); text-decoration: none; font-size: 0.88rem; padding: 4px 10px; border: 1px solid var(--tl-border); border-radius: 999px; display: inline-block; }
.mnp-toc a:hover { background: var(--tl-border); }

.mnp-section { margin: 36px 0; scroll-margin-top: 70px; }
.mnp-section h2 { font-size: 1.15rem; font-weight: 800; margin: 0 0 4px; }
.mnp-revisit { color: var(--tl-mint); font-size: 0.85rem; text-decoration: none; display: inline-block; margin-bottom: 14px; }
.mnp-revisit:hover { text-decoration: underline; }

.mnp-items { display: flex; flex-direction: column; gap: 14px; }

.mnp-card { background: var(--tl-surface); border: 1px solid var(--tl-border); border-radius: 14px; padding: 16px 18px; scroll-margin-top: 70px; }
.mnp-source { margin: 0 0 8px; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--tl-mint); font-weight: 800; }
.mnp-prompt p { margin: 0 0 6px; line-height: 1.55; font-weight: 600; }
.mnp-prompt p:last-child { margin-bottom: 0; }

.mnp-options { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; }
.mnp-option {
  text-align: left;
  padding: 11px 14px;
  min-height: 46px;
  border-radius: 10px;
  border: 1px solid var(--tl-border);
  background: rgba(255, 255, 255, 0.04);
  color: var(--tl-text);
  font-family: inherit;
  font-size: 0.95rem;
  cursor: pointer;
}
.mnp-option:not(:disabled):hover { background: rgba(255, 255, 255, 0.09); }
.mnp-option:disabled { cursor: default; }
.mnp-option.is-correct { border-color: var(--tl-mint); background: rgba(169, 232, 207, 0.18); }
.mnp-option.is-wrong { border-color: var(--tl-wrong); background: rgba(227, 137, 122, 0.18); }
.mnp-option.is-answer:not(.is-correct) { border-color: var(--tl-mint); }

.mnp-reveal-btn {
  margin-top: 12px;
  min-height: 46px;
  padding: 10px 18px;
  border-radius: 10px;
  border: 1px solid var(--tl-mint);
  background: transparent;
  color: var(--tl-mint);
  font-family: inherit;
  font-weight: 700;
  font-size: 0.92rem;
  cursor: pointer;
}
.mnp-reveal-btn:hover { background: rgba(169, 232, 207, 0.12); }

.mnp-feedback { margin-top: 12px; padding: 12px 14px; background: rgba(255, 255, 255, 0.05); border-left: 3px solid var(--tl-mint); border-radius: 4px; }
.mnp-feedback p { margin: 0 0 6px; line-height: 1.5; color: var(--tl-secondary); }
.mnp-feedback p:last-child { margin-bottom: 0; }
.mnp-verdict { color: var(--tl-cream) !important; font-weight: 800 !important; }

.mnp-privacy { margin-top: 40px; color: var(--tl-secondary); font-size: 0.8rem; opacity: 0.8; }

@media (max-width: 480px) {
  .mnp-main { padding: 18px 16px 60px; }
  .mnp-card { padding: 14px; }
}