/* =========================================================
   PromptForge — components.css
   Accordion, combobox, chips, color picker, dropzone,
   output panel, history cards, segmented control
   ========================================================= */

/* ---------- Accordion ---------- */
.accordion {
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  background: var(--surface);
  margin-bottom: var(--sp-3);
  /* Issue #3: visible by default so that fixed-position combobox panels
     are never clipped. The .accordion__body itself carries overflow:hidden
     when collapsed, which gives the rounded-corner clipping we want. */
  overflow: visible;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
/* When collapsed, switch the container to overflow:hidden so the rounded
   corners clip the body cleanly during the collapse animation. */
.accordion:not(.is-open) { overflow: hidden; }
/* Issue #1: last accordion in a panel must NOT reserve margin space below it. */
.accordion:last-child { margin-bottom: 0; }
.accordion.is-open {
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}
.accordion__head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 14px 16px;
  text-align: left;
  transition: background var(--dur) var(--ease);
}
.accordion__head:hover { background: var(--surface-2); }
.accordion__index {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-faint);
  letter-spacing: 0.05em;
  min-width: 22px;
}
.accordion__label {
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
}
.accordion.is-open .accordion__index { color: var(--accent); }
.accordion__chevron {
  display: inline-flex;
  color: var(--text-muted);
  transition: transform var(--dur) var(--ease), color var(--dur) var(--ease);
}
.accordion.is-open .accordion__chevron { transform: rotate(180deg); color: var(--accent); }

/* Accordion body — collapses to EXACTLY zero height with overflow:hidden.
   No padding, no margin, no reserved space when collapsed.
   When open, switches to overflow:visible AFTER the expand animation
   finishes (via .is-settled class added by JS) so that combobox dropdowns
   inside can extend beyond the accordion's bottom edge.
   Issue #1: padding is applied to the inner wrapper (.accordion__body > *),
   NEVER to .accordion__body itself, so the collapsed body has true 0 height. */
.accordion__body {
  max-height: 0;
  height: 0;
  padding: 0;
  margin: 0;
  overflow: hidden;
  transition: max-height 280ms var(--ease);
}
.accordion.is-open .accordion__body {
  max-height: 2400px;
  height: auto;
}
.accordion.is-open.is-settled .accordion__body {
  overflow: visible;
}

.accordion__body > .field,
.accordion__body > .seg,
.accordion__body > .color-row,
.accordion__body > .palette-preview,
.accordion__body > .chip-grid,
.accordion__body > .ratio-grid,
.accordion__body > .dropzone,
.accordion__body > .previews,
.accordion__body > .subjects { padding: 0 16px; }
.accordion__body .field:first-child { padding-top: 4px; }
/* Issue #1: bottom padding lives on the LAST child of the body, not on the body
   itself. This guarantees the collapsed body has zero height. */
.accordion.is-open .accordion__body > .field:last-child,
.accordion.is-open .accordion__body > .subjects:last-child,
.accordion.is-open .accordion__body > .previews:last-child,
.accordion.is-open .accordion__body > .dropzone:last-child { padding-bottom: 16px; }
.accordion__body > .field:last-child { margin-bottom: 0; }
.accordion__body .previews { padding-top: 8px; padding-bottom: 0; }
.accordion__body .subjects:last-child { margin-bottom: 0; }

/* ---------- Combobox ---------- */
.combobox { position: relative; width: 100%; }
.combobox__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 10px 12px;
  border-radius: var(--r-md);
  font-size: 13.5px;
  text-align: left;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  min-height: 40px;
}
.combobox__trigger:hover { border-color: var(--surface-3); }
.combobox.is-open .combobox__trigger {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.combobox__value { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.combobox__value.is-placeholder { color: var(--text-faint); }
.combobox__caret {
  display: inline-flex; color: var(--text-muted);
  transition: transform var(--dur) var(--ease);
}
.combobox.is-open .combobox__caret { transform: rotate(180deg); color: var(--accent); }

.combobox__panel {
  position: fixed;             /* set by JS — escapes all parent overflow:hidden */
  z-index: 1000;
  background: var(--surface-3);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  display: none;
  flex-direction: column;
  max-height: min(420px, 60vh);
  overflow: hidden;
}
.combobox.is-open .combobox__panel { display: flex; }
.combobox__search-wrap {
  padding: var(--sp-2);
  border-bottom: 1px solid var(--border-soft);
  position: relative;
  flex-shrink: 0;
}
.combobox__search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  pointer-events: none;
}
.combobox__search {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
  color: var(--text);
  padding: 8px 10px 8px 32px;
  border-radius: var(--r-sm);
  font-size: 13px;
  outline: none;
}
.combobox__search:focus { border-color: var(--accent); }
.combobox__list {
  list-style: none;
  margin: 0;
  padding: 4px;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}
.combobox__group {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  padding: 10px 10px 6px;
}
.combobox__option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  padding: 8px 10px;
  border-radius: var(--r-sm);
  font-size: 13px;
  color: var(--text);
  cursor: pointer;
  transition: background var(--dur) var(--ease);
}
.combobox__option:hover,
.combobox__option.is-focused { background: var(--surface-2); }
.combobox__option.is-selected {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
}
.combobox__option-check {
  display: none;
  color: var(--accent);
}
.combobox__option.is-selected .combobox__option-check { display: inline-flex; }
.combobox__empty {
  padding: 16px;
  text-align: center;
  color: var(--text-faint);
  font-size: 12.5px;
}
.combobox__clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--text-muted);
  background: transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.combobox__clear:hover { background: var(--surface-3); color: var(--text); }

/* ---------- Segmented control ---------- */
.seg {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 3px;
  gap: 2px;
  width: 100%;
}
.seg__btn {
  flex: 1;
  padding: 7px 12px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: var(--r-sm);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.seg__btn:hover { color: var(--text); }
.seg__btn.is-active {
  background: var(--accent);
  color: #fff;
}

/* ---------- Color picker row ---------- */
.color-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  align-items: center;
}
.color-slot {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 4px 8px 4px 4px;
  position: relative;
}
.color-slot__picker {
  width: 30px;
  height: 30px;
  border: none;
  padding: 0;
  background: transparent;
  cursor: pointer;
  border-radius: var(--r-sm);
  overflow: hidden;
}
.color-slot__picker::-webkit-color-swatch-wrapper { padding: 0; }
.color-slot__picker::-webkit-color-swatch { border: 1px solid var(--border); border-radius: var(--r-sm); }
.color-slot__picker::-moz-color-swatch { border: 1px solid var(--border); border-radius: var(--r-sm); }
.color-slot__hex {
  background: transparent;
  border: none;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 12px;
  width: 78px;
  outline: none;
  text-transform: uppercase;
}
.color-slot__remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  color: var(--text-muted);
  background: transparent;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.color-slot__remove:hover { background: var(--surface-3); color: var(--danger); }
.color-row__add { margin-top: var(--sp-2); }

.palette-preview {
  height: 56px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--surface-2);
  display: flex;
  overflow: hidden;
}
.palette-preview__seg {
  flex: 1;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.85);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  letter-spacing: 0.04em;
}
.palette-preview.is-empty::before {
  content: "Add colors to preview palette";
  color: var(--text-faint);
  font-size: 12px;
  width: 100%;
  text-align: center;
  align-self: center;
  text-shadow: none;
}

/* ---------- Dropzone ---------- */
.dropzone {
  position: relative;
  border: 1.5px dashed var(--border);
  border-radius: var(--r-md);
  background: var(--surface-2);
  padding: var(--sp-5);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent); background: var(--surface); outline: none; }
.dropzone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.dropzone__input {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}
.dropzone__prompt {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  color: var(--text-muted);
  font-size: 13px;
}
.dropzone__prompt em { color: var(--accent); font-style: normal; font-weight: 600; }

.previews {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
  gap: var(--sp-2);
  margin-top: var(--sp-2);
}
.previews:empty { display: none; }
.preview {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--r-sm);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.preview img { width: 100%; height: 100%; object-fit: cover; }
.preview__remove {
  position: absolute;
  top: 4px; right: 4px;
  width: 18px; height: 18px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.85);
  color: var(--text);
  border: 1px solid var(--border);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.preview__remove:hover { background: var(--danger); color: #fff; }

/* ---------- Chip grid (multi / single select) ---------- */
.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: var(--r-md);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
  user-select: none;
}
.chip:hover { color: var(--text); border-color: var(--surface-3); }
.chip.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--text);
}
.chip.is-active::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* ---------- Ratio grid ---------- */
.ratio-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-2);
}
.ratio {
  position: relative;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 10px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
}
.ratio:hover { color: var(--text); border-color: var(--surface-3); }
.ratio.is-active {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--text);
}
.ratio__shape {
  background: currentColor;
  opacity: 0.85;
  border-radius: 2px;
}

/* ---------- Output panel ---------- */
.output { padding: var(--sp-5) var(--sp-6); border-bottom: 1px solid var(--border-soft); }
.output__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.output__actions { display: flex; gap: var(--sp-2); }

.output__body { display: flex; flex-direction: column; gap: var(--sp-4); }
.output__block {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.output__block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-soft);
  background: var(--surface-2);
}
.output__label {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.output__text {
  padding: 14px 16px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text);
  font-family: var(--font-mono);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 72px;
}
.output__text--muted { color: var(--text-muted); }
.output__placeholder {
  color: var(--text-faint);
  font-family: var(--font-sans);
  font-size: 13px;
  font-style: normal;
  display: block;
  text-align: center;
}
.output__placeholder strong { color: var(--accent); }

.output__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.output__meta:empty { display: none; }
.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border-soft);
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.meta-pill strong { color: var(--text); font-weight: 600; }

.output__save {
  display: flex;
  gap: var(--sp-2);
  flex-wrap: wrap;
}

/* ---------- History / Favorites ---------- */
.history { padding: var(--sp-5) var(--sp-6); border-bottom: 1px solid var(--border-soft); }
.history:last-child { border-bottom: none; }
.history__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}
.history__body {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  /* Issue #2: adaptive max-height. Caps each list so all three right-panel
     blocks (output + history + favorites) fit a typical viewport. */
  max-height: 40vh;
  overflow-y: auto;
}
.history__empty {
  text-align: center;
  padding: var(--sp-6);
  color: var(--text-faint);
  font-size: 13px;
  border: 1px dashed var(--border-soft);
  border-radius: var(--r-md);
}

.entry {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--r-md);
  padding: 12px 14px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.entry:hover { border-color: var(--border); background: var(--surface-2); }
.entry__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: 6px;
}
.entry__title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.entry__time { font-size: 11px; color: var(--text-faint); font-family: var(--font-mono); }
.entry__prompt {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-family: var(--font-mono);
}
.entry__actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.entry__btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  font-size: 11.5px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  border: 1px solid var(--border-soft);
  background: var(--surface-2);
  transition: all var(--dur) var(--ease);
}
.entry__btn:hover { color: var(--text); border-color: var(--border); background: var(--surface-3); }
.entry__btn--danger:hover { color: var(--danger); border-color: rgba(239, 68, 68, 0.4); }
.entry__btn--star.is-active { color: var(--warning); border-color: rgba(245, 158, 11, 0.4); }

/* ---------- Brand sm (footer) ---------- */
.brand__mark--sm {
  display: inline-flex;
  height: 32px;
  width: auto;
  object-fit: contain;
  border-radius: var(--r-sm);
  flex-shrink: 0;
}
.brand__mark { display: inline-flex; border-radius: var(--r-sm); }

/* ---------- Field hints ---------- */
.field__hint {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
  color: var(--text-faint);
  font-size: 11px;
  margin-left: 4px;
}

/* ---------- Subjects (multi-subject list) ---------- */
.subjects {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.subjects:empty + .subjects__add { margin-top: 0; }
.subject-row {
  display: grid;
  grid-template-columns: 24px 1fr 140px auto;
  gap: var(--sp-2);
  align-items: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 6px 8px;
}
.subject-row__index {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  text-align: center;
}
.subject-row__input {
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 13px;
  padding: 4px 6px;
  outline: none;
  width: 100%;
}
.subject-row__input::placeholder { color: var(--text-faint); }
.subject-row__importance {
  background: var(--surface-3);
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
  font-size: 11.5px;
  padding: 4px 6px;
  border-radius: var(--r-sm);
  outline: none;
  cursor: pointer;
}
.subject-row__importance:focus { border-color: var(--accent); }
.subject-row__actions {
  display: inline-flex;
  gap: 2px;
}
.subject-row__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--r-sm);
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--dur) var(--ease);
}
.subject-row__btn:hover {
  background: var(--surface-3);
  color: var(--text);
  border-color: var(--border);
}
.subject-row__btn:disabled { opacity: 0.3; cursor: not-allowed; }
.subject-row__btn--danger:hover { color: var(--danger); border-color: rgba(239, 68, 68, 0.4); }
.subjects__add { margin-top: var(--sp-2); }