/* =============================================================
 * Prompt Engineering Tool — modular stylesheet
 * Loaded as a non-critical sheet via $page['css'].
 * Scope: .pe-* selectors only. No global resets.
 * ============================================================= */

.pe-tabs {
  display: flex;
  gap: 0.25rem;
  border-bottom: 2px solid var(--border);
  max-width: 72rem;
  margin: 1rem auto 0;
  padding: 0 clamp(1rem, 4vw, 2rem);
  overflow-x: auto;
  flex-wrap: nowrap;
}
.pe-tab {
  padding: 0.6rem 1.2rem;
  border: none;
  background: none;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--slate);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
  min-height: 44px;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.pe-tab:hover { color: var(--ink); }
.pe-tab[aria-selected="true"] { color: var(--primary-dark); border-bottom-color: var(--primary); font-weight: 600; }
.pe-tab svg { width: 1rem; height: 1rem; }
.pe-panel { display: none; max-width: 72rem; margin: 0 auto; padding: 1.5rem clamp(1rem, 4vw, 2rem); }
.pe-panel.active { display: block; }
.pe-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); gap: 1.5rem; }
.pe-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-xl); padding: 1.5rem; box-shadow: var(--shadow-sm); }
.pe-card h3 { font-family: var(--font-display); font-size: 1.1rem; margin: 0 0 0.5rem; }
.pe-card p { color: var(--slate); font-size: 0.9rem; margin: 0 0 1rem; line-height: 1.5; }
.pe-form { display: grid; gap: 1rem; }
.pe-form label { font-weight: 600; font-size: 0.9rem; display: block; margin-bottom: 0.3rem; }
.pe-form select,
.pe-form input[type="text"],
.pe-form textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font: inherit;
  font-size: 0.95rem;
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.pe-form select:focus,
.pe-form input[type="text"]:focus,
.pe-form textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.pe-form textarea { min-height: 100px; resize: vertical; }
.pe-form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748B' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.25rem;
  -webkit-appearance: none;
  appearance: none;
}
.pe-hint { font-size: 0.8rem; color: var(--slate); margin-top: 0.2rem; }
.pe-output {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 120px;
  position: relative;
}
.pe-output:empty::before { content: attr(data-placeholder); color: var(--slate); font-family: var(--font-sans); }
.pe-action-row { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-top: 1rem; }
.pe-spinner {
  display: inline-block;
  width: 1em; height: 1em;
  margin-right: 0.4rem;
  border: 2pt solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: tbSpin 0.8s linear infinite;
  vertical-align: middle;
}
.pe-score-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0.75rem; margin: 1rem 0; }
.pe-score { text-align: center; padding: 1rem; background: var(--paper); border: 1px solid var(--border); border-radius: var(--radius-lg); }
.pe-score__num { font-family: var(--font-mono); font-size: 1.75rem; font-weight: 700; display: block; }
.pe-score__num--high { color: #059669; }
.pe-score__num--mid { color: #d97706; }
.pe-score__num--low { color: #dc2626; }
.pe-score__label { font-size: 0.75rem; color: var(--slate); margin-top: 0.2rem; }
.pe-tips { list-style: none; padding: 0; margin: 0; }
.pe-tips li {
  padding: 0.6rem 0.8rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--ink);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
.pe-tips li:last-child { border-bottom: none; }
.pe-tips li::before {
  content: "";
  flex-shrink: 0;
  width: 1.5rem; height: 1.5rem;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; font-weight: 700;
  margin-top: 0.1rem;
}
.pe-tips li.good::before { background: #d1fae5; color: #059669; content: "\2713"; }
.pe-tips li.warn::before { background: #fef3c7; color: #d97706; content: "\26A0"; }
.pe-tips li.bad::before  { background: #fee2e2; color: #dc2626; content: "\2717"; }
.pe-templates-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 18rem), 1fr)); gap: 1rem; }
.pe-template {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  cursor: pointer;
  transition: all var(--transition);
}
.pe-template:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); transform: translateY(-1px); }
.pe-template h4 { font-size: 0.95rem; margin: 0 0 0.3rem; color: var(--ink); }
.pe-template__cat { font-family: var(--font-mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--primary-dark); margin-bottom: 0.4rem; }
.pe-template p { font-size: 0.85rem; color: var(--slate); margin: 0; line-height: 1.45; }
.pe-my-list { display: grid; gap: 0.75rem; }
.pe-my-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 1.25rem;
  display: flex;
  gap: 1rem;
  align-items: center;
}
.pe-my-item__info { flex: 1; min-width: 0; }
.pe-my-item__name { font-weight: 600; font-size: 0.95rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin: 0 0 0.2rem; }
.pe-my-item__meta { font-size: 0.8rem; color: var(--slate); margin: 0; }
.pe-my-item__actions { display: flex; gap: 0.35rem; flex-shrink: 0; }
.pe-stat-bar {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0 0 1.5rem;
  padding: 1rem;
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.pe-stat { text-align: center; }
.pe-stat__num { font-family: var(--font-mono); font-size: 1.25rem; font-weight: 700; color: var(--primary-dark); display: block; }
.pe-stat__label { font-size: 0.75rem; color: var(--slate); }
.pe-placeholder { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1rem; margin: 1rem 0; }
.pe-ph-item {
  padding: 0.5rem 0.75rem;
  background: var(--moss-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--slate);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.pe-ph-item:hover { border-color: var(--primary); color: var(--primary-dark); }
.pe-word-count { font-size: 0.75rem; color: var(--slate); margin-top: 0.2rem; text-align: right; font-family: var(--font-mono); }
.pe-checkbox-row { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.5rem; cursor: pointer; min-height: 44px; }
.pe-checkbox-row input[type="checkbox"] { width: 1.1rem; height: 1.1rem; accent-color: var(--primary); cursor: pointer; flex-shrink: 0; margin: 0; }
.pe-checkbox-label { font-size: 0.9rem; color: var(--ink); cursor: pointer; line-height: 1.4; }

.pe-output.has-content { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.1); }
.pe-output.has-content:empty::before { content: none; }

/* ── Modal ── */
.pe-modal-overlay { position: fixed; inset: 0; background: rgba(0, 0, 0, 0.5); z-index: 99998; display: none; align-items: center; justify-content: center; padding: 1rem; }
.pe-modal-overlay.open { display: flex; }
.pe-modal { background: var(--white); border-radius: var(--radius-xl); max-width: 32rem; width: 100%; padding: 1.75rem; position: relative; box-shadow: var(--shadow-lg); }
.pe-modal__close { position: absolute; top: 1rem; right: 1rem; background: none; border: none; cursor: pointer; color: var(--slate); padding: 0.25rem; }
.pe-modal__close:hover { color: var(--ink); }
.pe-modal__close svg { width: 1.25rem; height: 1.25rem; display: block; }
.pe-modal h2 { font-family: var(--font-display); font-size: 1.3rem; margin: 0 0 0.25rem; padding-right: 2rem; }

.pe-share-row { display: flex; gap: 0.5rem; margin: 1rem 0; }
.pe-share-input {
  flex: 1;
  min-width: 200px;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  background: var(--paper);
  color: var(--ink);
}
.pe-share-input:focus { border-color: var(--primary); outline: 2px solid var(--primary); outline-offset: 2px; }
.pe-share-qr { margin-top: 1rem; padding: 1rem; background: var(--paper); border: 1px dashed var(--border); border-radius: var(--radius-md); display: flex; justify-content: center; align-items: center; min-height: 140px; }

/* ── Shortcuts Panel ── */
.pe-shortcuts-panel {
  position: fixed;
  bottom: 70px;
  right: 1.5rem;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), 0 4px 20px rgba(0, 0, 0, 0.15);
  padding: 1rem 1.25rem;
  max-width: 340px;
  z-index: 9999;
  display: none;
}
.pe-shortcuts-panel.visible { display: block; }
.pe-shortcuts-panel__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.75rem; }
.pe-shortcuts-panel h3 { font-family: var(--font-display); font-weight: 700; margin: 0; color: var(--ink); font-size: 1.1rem; }
.pe-shortcut__close { background: none; border: none; cursor: pointer; color: var(--slate); padding: 0.25rem; font-size: 1.4rem; line-height: 1; }
.pe-shortcut__close:hover { color: var(--ink); }
.pe-shortcut__close svg { width: 1.1rem; height: 1.1rem; }
.pe-shortcuts-grid { display: grid; gap: 0.4rem; }
.pe-shortcut-row { display: flex; gap: 0.5rem; align-items: center; font-size: 0.8rem; }
.pe-shortcut-key {
  background: var(--moss-light);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--ink);
  min-width: 80px;
  text-align: center;
}
.pe-shortcut-desc { color: var(--slate); flex: 1; }

/* ── Framework badges ── */
.pe-frameworks,
.pe-framework-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.5rem 0 0.25rem; }
.pe-framework-chip,
.pe-framework-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: var(--moss-light);
  color: var(--primary-dark);
  border: 1px solid var(--border);
}

/* ── A/B Compare ── */
.pe-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.pe-compare__pane {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  white-space: pre-wrap;
  min-height: 160px;
}
.pe-compare__head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.pe-compare__head h4 { margin: 0; font-size: 0.85rem; font-family: var(--font-display); }
.pe-compare__diff { color: #059669; }
.pe-compare__diff--removed { color: #dc2626; text-decoration: line-through; }

/* ── Responsive ── */
@media (max-width: 768px) {
  .pe-compare { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .pe-score-grid { grid-template-columns: repeat(2, 1fr); }
  .pe-templates-grid { grid-template-columns: 1fr; }
  .pe-my-item { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) {
  .pe-template,
  .pe-template:hover { transform: none; transition: border-color var(--transition), box-shadow var(--transition); }
}

/* ── Accessibility ── */
.pe-tab:focus-visible,
.pe-form select:focus-visible,
.pe-form input[type="text"]:focus-visible,
.pe-form textarea:focus-visible,
.pe-template:focus-visible,
.pe-my-item button:focus-visible,
.pe-score:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
.pe-template:focus-visible { outline-offset: -2px; border-color: var(--primary); }
.pe-sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.pe-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10001;
  background: var(--primary-dark);
  color: #fff;
  padding: 0.6rem 1.1rem;
  border-radius: 0 0 var(--radius-md) 0;
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none;
}

/* ── Live Score Indicator ─────────────────────────────── */
.pe-live-score {
  display: inline-block;
  margin-left: 1rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.8rem;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.pe-live-score[data-score="high"] {
  color: #16a34a;
  border-color: #16a34a;
}
.pe-live-score[data-score="medium"] {
  color: #d97706;
  border-color: #d97706;
}
.pe-live-score[data-score="low"] {
  color: #dc2626;
  border-color: #dc2626;
}

/* ── Editable Output ─────────────────────────────────── */
.pe-output--editable {
  display: block;
  width: 100%;
  min-height: 12rem;
  resize: vertical;
  font-family: inherit;
  font-size: var(--text-sm);
  line-height: 1.6;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  background: var(--surface);
  color: var(--text);
  transition: border-color var(--transition);
}
.pe-output--editable:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
}
.pe-skip-link:focus { left: 0; }