/* White-label base: everything themeable keys off --accent. Swap this one
   variable (plus the two -soft/-ink derivatives) to re-skin for a
   different brand/client - nothing else in this file should need to
   change. Neutral grays throughout, no brand-specific hue baked in. */
:root {
  --accent: #3458EA;
  --accent-soft: #EEF2FE;
  --accent-ink: #1F3AA8;

  --bg: #FAFAFB;
  --surface: #FFFFFF;
  --border: #E3E5E9;
  --text: #16181D;
  --text-muted: #676D79;
  --text-faint: #9AA0AA;

  --danger: #B3261E;
  --danger-soft: #FBEAE9;
  --ok: #1E7B5A;
  --ok-soft: #E7F5EF;

  --radius: 8px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}

.shell { display: flex; min-height: 100vh; }

.rail {
  width: 200px;
  flex: none;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.brand { font-weight: 700; font-size: 0.95rem; letter-spacing: 0.02em; }
.brand span { color: var(--text-faint); font-weight: 400; }

.rail-btn {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.6rem 0.75rem;
  border: none;
  background: none;
  border-radius: var(--radius);
  color: var(--text-muted);
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.rail-btn:hover { background: var(--bg); color: var(--text); }
.rail-btn.is-active { background: var(--accent-soft); color: var(--accent-ink); font-weight: 600; }

.content { flex: 1; padding: 2.5rem 3rem; max-width: 980px; }

.screen { display: none; }
.screen.is-active { display: block; }

.screen-header { margin-bottom: 1.75rem; }
.screen-header h1 { margin: 0 0 0.25rem; font-size: 1.5rem; }
.screen-header p { margin: 0; color: var(--text-muted); }

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.field-row { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.field-row label { display: flex; flex-direction: column; gap: 0.35rem; font-size: 0.82rem; color: var(--text-muted); flex: 1; min-width: 140px; }
input, select, textarea {
  font: inherit;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
}
textarea { resize: vertical; }

.btn {
  font: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-accent { background: var(--accent); color: #fff; }
.btn-accent:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-danger { color: var(--danger); border-color: var(--danger-soft); }
.btn-danger:disabled { color: var(--text); }

.status-text { margin-left: 0.75rem; font-size: 0.82rem; color: var(--text-muted); }

.icon-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  padding: 0.3rem;
  border-radius: 6px;
  color: var(--text-faint);
}
.icon-btn:hover { background: var(--bg); color: var(--text); }
.trash-btn:hover { color: var(--danger); }
.bookmark-btn.is-saved { color: #C99A2E; }

/* ---- filter bar ---- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.6rem 1.2rem; }
.filter-group { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.filter-chip {
  font: inherit;
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
}
.filter-chip:hover { border-color: var(--accent); color: var(--text); }
.filter-chip.is-on { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }

/* ---- topics list toolbar ---- */
.list-toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 0.6rem; }
.checkbox-label { display: flex; align-items: center; gap: 0.4rem; font-size: 0.85rem; color: var(--text-muted); }

.topic-list { display: flex; flex-direction: column; gap: 0.6rem; }
.topic-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  cursor: pointer;
  transition: border-color 0.1s, background 0.1s;
}
.topic-card:hover { border-color: var(--accent); background: var(--accent-soft); }
.topic-card.is-chosen { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 1px var(--accent); }
.topic-card-body { flex: 1; min-width: 0; }
.topic-card-text { font-weight: 600; }
.topic-card-angle { color: var(--text-muted); font-size: 0.85rem; margin-top: 0.15rem; }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.35rem; margin-top: 0.5rem; }
.tag {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

.pagination { display: flex; align-items: center; gap: 0.75rem; margin: 1rem 0; }
.pagination-label { font-size: 0.82rem; color: var(--text-muted); }

.step-actions { display: flex; align-items: center; justify-content: space-between; margin-top: 1.25rem; }

.concepts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-bottom: 1.25rem; }
.concept-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  cursor: pointer;
}
.concept-card.is-selected { border-color: var(--accent); background: var(--accent-soft); }
.concept-card-top { display: flex; align-items: center; justify-content: space-between; }
.concept-label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--text-faint); }
.concept-headline { font-weight: 700; }
.concept-subline, .concept-cta { font-size: 0.85rem; color: var(--text-muted); }
.concept-gate {
  margin-top: auto;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  width: fit-content;
}
.concept-gate.pass { background: var(--ok-soft); color: var(--ok); }
.concept-gate.fail { background: var(--danger-soft); color: var(--danger); }

.concept-en {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-top: 0.6rem;
  margin-top: 0.2rem;
  border-top: 1px dashed var(--border);
}
.concept-en-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-faint);
}
.concept-en .concept-headline { font-size: 0.92rem; }
.concept-caption-en { font-size: 0.8rem; color: var(--text-muted); }

.saved-concepts-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.saved-concept-card {
  background: var(--bg);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  cursor: pointer;
}
.saved-concept-card:hover { border-color: var(--accent); }

.editor { display: flex; flex-direction: column; gap: 0.85rem; }
.editor[hidden] { display: none; }

#image-concept-reference h2 { margin: 0 0 0.4rem; font-size: 1.1rem; }
#image-concept-reference p { margin: 0 0 0.3rem; color: var(--text-muted); font-size: 0.88rem; }

#image-result-panel img,
#assembly-result-panel img,
.publish-preview {
  max-width: 100%;
  max-height: 520px;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 0.75rem;
}

#image-result { cursor: zoom-in; }

.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 6, 10, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 2rem;
}
.lightbox-overlay[hidden] { display: none; }
.lightbox-overlay img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.lightbox-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  background: none;
  border: none;
  color: #fff;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.publish-result-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}
.publish-result-row:last-child { border-bottom: none; }
.publish-result-row.ok { color: var(--ok); }
.publish-result-row.fail { color: var(--danger); }

.assets-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.asset-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.asset-card img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 6px;
  cursor: zoom-in;
}
.editor label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.82rem; color: var(--text-muted); }
.editor-actions { display: flex; align-items: center; }