/* === BUILDER PAGE === */
.builder-hero {
  padding: 56px 0 48px;
  background:
    radial-gradient(ellipse 50% 60% at 50% -10%, var(--accent-glow) 0%, transparent 70%),
    var(--bg);
  border-bottom: 1px solid var(--border);
}

.builder-hero-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 32px;
}

.builder-headline {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--fg);
  margin-bottom: 16px;
  margin-top: 8px;
}

.builder-headline em {
  color: var(--accent);
  font-style: italic;
}

.builder-sub {
  font-size: 1.0625rem;
  color: var(--fg-2);
  line-height: 1.7;
  max-width: 560px;
}

/* === BUILDER FORM SECTION === */
.builder-form-section {
  padding: 48px 0 96px;
}

.builder-form-inner {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Input Panel */
.input-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 16px;
}

.input-mode-tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.mode-tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 24px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--fg-3);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: color 0.2s, background 0.2s;
}

.mode-tab:hover { color: var(--fg-2); }
.mode-tab.active {
  color: var(--fg);
  background: var(--bg-2);
  border-bottom: 2px solid var(--accent);
  margin-bottom: -1px;
}

.mode-content { padding: 28px; }
.mode-content.hidden { display: none; }

.input-field-group { margin-bottom: 20px; }

.input-label {
  display: block;
  font-size: 0.75rem;
  color: var(--fg-2);
  font-weight: 500;
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.input-field {
  width: 100%;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  color: var(--fg);
  line-height: 1.5;
  transition: border-color 0.2s;
  outline: none;
}

.input-field::placeholder { color: var(--fg-3); }
.input-field:focus { border-color: var(--accent); }

.textarea-field { resize: vertical; min-height: 110px; }

.char-count {
  text-align: right;
  font-size: 0.75rem;
  color: var(--fg-3);
  margin-top: 6px;
}

.btn-generate {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 15px 24px;
  background: var(--accent);
  color: var(--bg-2);
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: filter 0.2s, transform 0.1s;
}

.btn-generate:hover { filter: brightness(1.08); }
.btn-generate:active { transform: scale(0.99); }
.btn-generate:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Loading */
.loading-state {
  padding: 56px 32px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 16px;
}

.loading-state.hidden { display: none; }

.loading-spinner {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.loading-spinner svg {
  animation: spin 1s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-label {
  font-size: 1rem;
  color: var(--fg);
  font-weight: 500;
  margin-bottom: 8px;
}

.loading-sub {
  font-size: 0.875rem;
  color: var(--fg-3);
}

/* Error */
.error-state {
  padding: 56px 32px;
  text-align: center;
  background: var(--surface);
  border: 1px solid #5f2a1a;
  border-radius: 16px;
  margin-bottom: 16px;
}

.error-state.hidden { display: none; }

.error-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
  color: #ff7f50;
}

.error-label {
  font-size: 1rem;
  color: var(--fg);
  font-weight: 500;
  margin-bottom: 8px;
}

.error-sub {
  font-size: 0.875rem;
  color: var(--fg-3);
  margin-bottom: 20px;
}

.btn-retry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg);
  cursor: pointer;
  transition: background 0.2s;
}

.btn-retry:hover { background: var(--bg-2); }

/* Results */
.results-state.hidden { display: none; }

.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  background: var(--accent-dim);
  border: 1px solid rgba(240,165,0,0.3);
  border-radius: 12px;
  margin-bottom: 20px;
}

.results-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
}

.results-campaign-name {
  font-family: 'Instrument Serif', serif;
  font-size: 1.25rem;
  color: var(--fg);
}

.results-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-export {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--fg-2);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.btn-export:hover { background: var(--surface-2); color: var(--fg); }

.btn-export.accent {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-2);
}

.btn-export.accent:hover { filter: brightness(1.08); }

/* Ad Group Cards */
.ad-group-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 16px;
}

.ad-group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
}

.ad-group-name {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--fg);
}

.ad-group-count {
  font-size: 0.75rem;
  color: var(--fg-3);
}

.ad-group-body { padding: 16px 18px; }

/* Keywords */
.ad-section-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  margin-bottom: 10px;
  font-weight: 500;
}

.keywords-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.keyword-tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8125rem;
  color: var(--fg-2);
}

/* Headlines & Descriptions grid */
.copy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.copy-block-label {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--fg-3);
  margin-bottom: 10px;
  font-weight: 500;
}

.copy-items { display: flex; flex-direction: column; gap: 6px; }

.copy-item {
  padding: 10px 12px;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.875rem;
  color: var(--fg);
  line-height: 1.45;
}

.copy-item.headline {
  border-color: #1a2f4a;
  background: rgba(26, 47, 74, 0.3);
}

.copy-item.desc {
  border-color: #1a3a2a;
  background: rgba(26, 58, 42, 0.3);
}

.copy-item-num {
  font-size: 0.6875rem;
  color: var(--fg-3);
  margin-right: 6px;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(60px);
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  opacity: 0;
  transition: transform 0.25s ease, opacity 0.25s ease;
  pointer-events: none;
  z-index: 200;
}

.toast.visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive */
@media (max-width: 640px) {
  .builder-hero-inner { padding: 0 20px; }
  .builder-form-inner { padding: 0 20px; }
  .mode-content { padding: 20px; }
  .results-header { flex-direction: column; align-items: flex-start; }
  .copy-grid { grid-template-columns: 1fr; }
}