/* =========================================================
   Backstage — ClassForge styles
   Presentation cards, states, theme grid.
   All class names use cf- prefix (ClassForge-scoped).
   ========================================================= */

/* =========================================================
   TOOLBAR
   ========================================================= */

.cf-toolbar {
  display: flex;
  align-items: center;
  margin-bottom: 2rem;
  gap: 1rem;
}

.cf-toolbar h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  flex: 1;
}

.cf-new-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1.2rem;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity .2s, transform .2s;
}

.cf-new-btn:hover { opacity: .9; transform: translateY(-1px); text-decoration: none; color: white; }

.cf-refresh-btn {
  display: inline-flex; align-items: center; gap: 0.4rem;
  padding: 0.55rem 1rem;
  background: transparent;
  border: 1.5px solid rgba(20,184,166,.3);
  border-radius: 8px;
  color: var(--primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all .2s;
}

.cf-refresh-btn:hover { background: rgba(20,184,166,.08); border-color: var(--primary); }

/* =========================================================
   PRESENTATION CARDS
   ========================================================= */

.cf-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.cf-card {
  background: var(--surface);
  border: 1px solid rgba(20,184,166,.15);
  border-radius: 12px;
  overflow: hidden;
  transition: transform .25s, box-shadow .25s;
  box-shadow: 0 2px 8px var(--shadow);
}

.cf-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px var(--shadow);
  border-color: rgba(20,184,166,.35);
}

.cf-card-thumb {
  aspect-ratio: 16/9;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: rgba(255,255,255,.7);
  letter-spacing: -0.03em;
  position: relative;
}

.cf-card-badge {
  position: absolute;
  top: 10px; left: 10px;
  background: rgba(0,0,0,.45);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
}

.cf-card-badge--engine {
  top: auto; left: auto;
  bottom: 10px; right: 10px;
  background: rgba(0,0,0,.55);
}
.cf-card-badge--engine[data-engine="reveal"]  { background: rgba(30,80,200,.75); }
.cf-card-badge--engine[data-engine="panels"]  { background: rgba(10,130,80,.75); }

.cf-card-body {
  padding: 1.1rem 1.2rem 1.2rem;
}

.cf-card-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cf-card-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.cf-card-actions {
  display: flex;
  gap: 0.6rem;
}

.cf-btn-present {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.5rem 0.75rem;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: opacity .2s;
}

.cf-btn-present:hover { opacity: .85; color: white; text-decoration: none; }

.cf-btn-edit {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: 1.5px solid rgba(20,184,166,.35);
  border-radius: 6px;
  color: var(--primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all .2s;
}

.cf-btn-edit:hover {
  background: rgba(20,184,166,.08);
  border-color: var(--primary);
  text-decoration: none;
  color: var(--primary-dark);
}

.cf-btn-edit[disabled], .cf-btn-edit.cf-disabled {
  opacity: .3;
  pointer-events: none;
}

/* =========================================================
   STATES (loading, empty, error)
   ========================================================= */

.cf-state-block {
  grid-column: 1 / -1;
  text-align: center;
  padding: 2.5rem 1.5rem;
  color: var(--text-secondary);
}

.cf-state-block p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.cf-state-block .cf-state-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  display: block;
  opacity: .5;
}

.cf-inline-btn {
  display: inline-block;
  padding: 0.5rem 1.2rem;
  background: rgba(20,184,166,.12);
  border: 1.5px solid rgba(20,184,166,.4);
  border-radius: 8px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: 'Inter', sans-serif;
  transition: all .2s;
}

.cf-inline-btn:hover { background: rgba(20,184,166,.2); }

/* Skeleton loader */
.cf-skeleton {
  background: linear-gradient(90deg, rgba(20,184,166,.08) 25%, rgba(20,184,166,.16) 50%, rgba(20,184,166,.08) 75%);
  background-size: 200% 100%;
  animation: cf-shimmer 1.5s infinite;
  border-radius: 4px;
}

@keyframes cf-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.cf-card-skeleton .cf-card-thumb { background: none; }
.cf-card-skeleton .cf-card-thumb-sk {
  width: 100%; aspect-ratio: 16/9;
}
.cf-card-skeleton .cf-sk-line {
  height: 14px; margin-bottom: 8px; border-radius: 4px;
}
.cf-card-skeleton .cf-sk-line.short { width: 55%; }

/* =========================================================
   VISUAL THEME GRID (in settings drawer)
   ========================================================= */

.cf-theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.cf-theme-card {
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  overflow: hidden;
  transition: border-color .2s, transform .15s;
  outline: none;
}

.cf-theme-card:hover { transform: translateY(-2px); }

.cf-theme-card.cf-selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(20,184,166,.3);
}

.cf-theme-card-preview {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  aspect-ratio: 16/9;
}

.cf-theme-card-heading {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  font-family: 'Inter', sans-serif;
}

.cf-theme-card-bar {
  height: 2px;
  border-radius: 1px;
  width: 80%;
}

.cf-theme-card-lines {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 2px;
}

.cf-theme-card-line {
  height: 2px;
  border-radius: 1px;
  opacity: 0.45;
}

.cf-theme-card-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-align: center;
  padding: 4px 2px;
  text-transform: capitalize;
  letter-spacing: 0.02em;
  font-family: 'Inter', sans-serif;
}

.cf-theme-card-delete {
  position: absolute;
  top: 4px; right: 4px;
  width: 18px; height: 18px;
  background: rgba(0,0,0,.5);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 0.7rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity .15s;
  line-height: 1;
}

.cf-theme-card:hover .cf-theme-card-delete { opacity: 1; }
.cf-theme-card-delete:hover { background: rgba(239,68,68,.8); }

.cf-theme-card-rename {
  position: absolute;
  top: 4px; right: 26px;
  width: 18px; height: 18px;
  background: rgba(0,0,0,.5);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 0.65rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity .15s;
  line-height: 1;
}
.cf-theme-card:hover .cf-theme-card-rename { opacity: 1; }
.cf-theme-card-rename:hover { background: rgba(99,102,241,.8); }

.cf-theme-card-edit {
  position: absolute;
  top: 4px; right: 26px;
  width: 18px; height: 18px;
  background: rgba(0,0,0,.5);
  border: none;
  border-radius: 50%;
  color: #fff;
  font-size: 0.65rem;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity .15s;
  line-height: 1;
}
.cf-theme-card:hover .cf-theme-card-edit { opacity: 1; }
.cf-theme-card-edit:hover { background: rgba(99,102,241,.8); }

.cf-creator-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}
.cf-creator-tab {
  padding: 0.5rem 1rem;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.cf-creator-tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.cf-creator-tab:hover { color: var(--text-primary); }

.cf-color-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.cf-color-row label {
  width: 70px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.cf-color-row input[type="color"] {
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
  cursor: pointer;
  background: none;
  flex-shrink: 0;
}
.cf-color-row input[type="text"] {
  flex: 1;
  font-family: monospace;
  font-size: 0.82rem;
}

.cf-theme-card-wrap {
  position: relative;
}

/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 600px) {
  .cf-grid { grid-template-columns: 1fr; }
}