/* StudyStats sample-size calculators — shared styles */

.ss-calc {
  --bg: #121212;
  --panel: #1e1e1e;
  --panel-2: #262626;
  --border: #333;
  --text: #fff;
  --muted: #b8b8b8;
  --accent: #4ECDC4;
  --accent-2: #FF6B6B;
  --warn: #f3c969;
  font-family: 'Helvetica Neue', Arial, sans-serif;
  color: var(--text);
  margin: 1.5rem 0 3rem;
}

.ss-calc h2 { font-size: 1.6rem; margin: 0 0 0.5rem; }
.ss-calc .ss-lede {
  color: var(--muted);
  font-size: 1rem;
  margin: 0 0 1.25rem;
  max-width: 70ch;
  line-height: 1.55;
}

/* Quick-start scenarios */
.ss-quickstart {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.ss-quickstart button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.ss-quickstart button:hover,
.ss-quickstart button.active {
  background: var(--accent);
  color: #121212;
  border-color: var(--accent);
}

/* Two-column grid: inputs left, result right */
.ss-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
}
@media (max-width: 760px) {
  .ss-grid { grid-template-columns: 1fr; }
}

.ss-inputs, .ss-result {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
}

/* Input fields */
.ss-field { margin-bottom: 1rem; }
.ss-field:last-child { margin-bottom: 0; }
.ss-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
}
.ss-field .ss-symbol {
  color: var(--muted);
  font-weight: 400;
  font-size: 0.85rem;
  margin-left: 0.35rem;
}
.ss-field .ss-tip {
  color: var(--muted);
  font-size: 0.82rem;
  margin: 0.15rem 0 0.4rem;
}
.ss-field input[type="number"],
.ss-field select {
  width: 100%;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem 0.65rem;
  font-size: 1rem;
  font: inherit;
}
.ss-field input[type="number"]:focus,
.ss-field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.ss-field input[type="checkbox"] { margin-right: 0.4rem; }

/* "How to justify" expand boxes */
.ss-justify {
  margin-top: 0.4rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.88rem;
}
.ss-justify > summary {
  list-style: none;
  cursor: pointer;
  padding: 0.45rem 0.7rem;
  color: var(--accent);
  font-weight: 500;
  user-select: none;
}
.ss-justify > summary::-webkit-details-marker { display: none; }
.ss-justify > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s;
}
.ss-justify[open] > summary::before { transform: rotate(90deg); }
.ss-justify-body {
  padding: 0 0.85rem 0.75rem;
  color: var(--muted);
  line-height: 1.5;
}
.ss-justify-body p { margin: 0.5rem 0; }
.ss-justify-body ul, .ss-justify-body ol { margin: 0.4rem 0 0.4rem 1.1rem; padding: 0; }
.ss-justify-body li { margin: 0.25rem 0; }
.ss-justify-body code,
.ss-justify-body .ss-cite {
  font-size: 0.85em;
  background: rgba(78, 205, 196, 0.1);
  padding: 1px 4px;
  border-radius: 3px;
  color: #d8f5f2;
}

/* Result panel */
.ss-result h3 {
  margin: 0 0 0.4rem;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.ss-big {
  font-size: 3rem;
  font-weight: 700;
  line-height: 1;
  margin: 0.2rem 0;
  color: var(--accent);
}
.ss-big.ss-warn { color: var(--warn); }
.ss-result .ss-sub {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 1rem;
}
.ss-interpret {
  background: var(--panel-2);
  border-left: 3px solid var(--accent);
  padding: 0.7rem 0.9rem;
  border-radius: 4px;
  margin: 0.5rem 0 1rem;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Action buttons */
.ss-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.ss-actions button {
  background: var(--accent);
  color: #121212;
  border: none;
  padding: 0.55rem 0.95rem;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
}
.ss-actions button.ss-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.ss-actions button:hover { filter: brightness(1.1); }
.ss-toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #121212;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.55rem 1rem;
  border-radius: 8px;
  font-size: 0.9rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  z-index: 2000;
}
.ss-toast.show { opacity: 1; }

/* Bottom expand-boxes (formula, R code, methods) */
.ss-details {
  margin-top: 1.25rem;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.ss-details > summary {
  cursor: pointer;
  padding: 0.85rem 1.1rem;
  font-weight: 600;
  color: var(--accent);
  list-style: none;
}
.ss-details > summary::-webkit-details-marker { display: none; }
.ss-details > summary::before {
  content: "▸ ";
  display: inline-block;
  transition: transform 0.15s;
}
.ss-details[open] > summary::before { transform: rotate(90deg); }
.ss-details-body {
  padding: 0 1.1rem 1.1rem;
  color: var(--text);
  line-height: 1.55;
}
.ss-details pre, .ss-details code {
  background: #0f0f0f;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.7rem 0.85rem;
  display: block;
  overflow-x: auto;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: #d8f5f2;
  white-space: pre;
}

/* SVG power curve */
.ss-chart {
  width: 100%;
  margin-top: 1rem;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem;
}
.ss-chart svg { width: 100%; height: auto; display: block; }

/* Quiet "lab" link in footer of fast page */
.ss-lab-link {
  margin-top: 2rem;
  font-size: 0.8rem;
  color: var(--muted);
  text-align: right;
}
.ss-lab-link a { color: var(--muted); text-decoration: underline dotted; }