/* ── How-To page specific styles ───────────────────── */
.howto-steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; margin-top: 8px;}

/* Personal Dashboard section: 2×3 on wide screens, 2×2 / 1 col on smaller */
.howto-dash-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
@media (max-width: 960px) {
  .howto-dash-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
  .howto-dash-grid { grid-template-columns: 1fr; }
}
.howto-dash-grid .howto-step-card p { line-height: 1.8; }
.howto-step-card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 28px 24px; position: relative; overflow: hidden; transition: border-color 0.2s;}
.howto-step-card:hover { border-color: var(--border2); }
.howto-step-num { font-family: var(--font-display); font-weight: 800; font-size: 3.5rem; color: var(--border2); line-height: 1; position: absolute; top: 12px; right: 18px; letter-spacing: -0.05em; pointer-events: none;}
.howto-step-icon { font-size: 1.6rem; margin-bottom: 16px;}
.howto-step-card h3 { font-family: var(--font-display); font-weight: 700; font-size: 1rem; color: var(--text); margin-bottom: 10px;}
.howto-step-card p { font-size: 0.78rem; color: var(--text-dim); line-height: 1.75;}

/* Detail blocks */
.howto-detail { border-bottom: 1px solid var(--border); padding: 36px 0;}
.howto-detail:first-of-type { padding-top: 0; }
.howto-detail-header { display: flex; align-items: baseline; gap: 20px; margin-bottom: 20px;}
.howto-detail-num { font-family: var(--font-display); font-weight: 800; font-size: 1.1rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--accent); white-space: nowrap;}
.howto-detail-header h3 { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--text); letter-spacing: -0.02em;}
.howto-detail-body p { font-size: 0.82rem; color: var(--text-dim); line-height: 1.8; max-width: 720px;}
.howto-list { margin: 16px 0 0 20px; display: flex; flex-direction: column; gap: 10px;}
.howto-list li { font-size: 0.82rem; color: var(--text-dim); line-height: 1.7;}
kbd { font-family: var(--font-data); font-size: 0.72rem; background: var(--surface2); border: 1px solid var(--border2); border-radius: 4px; padding: 2px 7px; color: var(--text);}
.howto-tip { margin-top: 20px; background: var(--surface); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 0 8px 8px 0; padding: 16px 20px; font-size: 0.78rem; color: var(--text-dim); line-height: 1.75; max-width: 720px;}
.about-section > .howto-tip { max-width: none; width: 100%; box-sizing: border-box; }
.howto-tip-label { display: block; font-family: var(--font-display); font-weight: 700; font-size: 0.72rem; color: var(--accent); margin: 0 0 10px; letter-spacing: 0.04em;}
.howto-tip > p { margin: 10px 0 0; font-size: inherit; color: inherit; line-height: inherit;}
.howto-tip-label + p { margin-top: 0; }
.howto-tip > .btn-primary { margin-top: 10px; display: inline-block;}

/* ML model section — stacked prose */
.howto-model-body {
  max-width: 820px;
  margin-top: 8px;
}

.howto-model-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text);
  margin: 28px 0 10px;
  letter-spacing: -0.02em;
}

.howto-model-heading:first-child {
  margin-top: 0;
}

.howto-model-body p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.85;
  margin: 0 0 14px;
}

.howto-model-body p:last-child {
  margin-bottom: 0;
}

/* Legend */
.howto-map-intro {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 820px;
  margin-bottom: 32px;
}
.howto-map-intro a { color: var(--accent); text-decoration: none; }
.howto-map-intro a:hover { text-decoration: underline; }

.howto-legend-block { display: flex; flex-direction: column; gap: 0; border: 1px solid var(--border); border-radius: 12px; overflow: hidden;}
.howto-legend-row { display: flex; gap: 24px; align-items: flex-start; padding: 28px; border-bottom: 1px solid var(--border); transition: background 0.15s;}
.howto-legend-row--last { border-bottom: none; }
.howto-legend-row:hover { background: var(--surface); }
.howto-legend-swatches {
  display: flex;
  flex-direction: column-reverse; /* low percentile / dark at bottom, high at top */
  width: 48px;
  min-height: 48px;
  height: 100%;
  align-self: stretch;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  flex-shrink: 0;
}
.howto-legend-swatch-seg { flex: 1 1 0; min-height: 3px; }
.howto-legend-label { font-family: var(--font-display); font-weight: 700; font-size: 0.88rem; color: var(--text); margin-bottom: 6px;}
.howto-legend-map-steps {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin: 0 0 10px;
  max-width: 680px;
}
.howto-legend-row p { font-size: 0.78rem; color: var(--text-dim); line-height: 1.75; max-width: 680px; margin: 0; }

/* FAQ accordion */
.howto-faq { margin-top: 8px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden;}

.howto-faq-item {
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
  cursor: pointer;
}
.howto-faq-item--last { border-bottom: none; }
.howto-faq-item:hover { background: var(--surface); }

.howto-faq-details { display: block; }

.howto-faq-q {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text);
  margin: 0;
  padding-block: 20px;
  padding-inline: 28px 56px;
  cursor: pointer;
  list-style: none;
  position: relative;
  user-select: none;
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: left;
}
.howto-faq-q::-webkit-details-marker { display: none; }
.howto-faq-q::marker { content: ''; }
.howto-faq-q::after {
  content: '+';
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text-dim);
  line-height: 1;
  transition: color 0.15s ease;
  pointer-events: none;
}
.howto-faq-details[open] .howto-faq-q::after { content: '−'; color: var(--text);}

.howto-faq-a {
  padding: 0 28px 22px;
  cursor: text;
}
.howto-faq-a p {
  font-size: 0.78rem;
  color: var(--text-dim);
  line-height: 1.75;
  max-width: 700px;
  margin: 0;
}