/* tool.css — EpubFile shared styles for TOOL DETAIL pages only
   (cover-size.html, epub-check.html, font-preview.html, and future tools)
   Load AFTER site6.css. Do not put site-wide chrome (topbar/footer/about
   sections) here — that belongs in site6.css.
   ============================================================ */

/* ── Page shell ──────────────────────────────────────────── */
.tool-page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px 80px;
}

/* ── Hero ────────────────────────────────────────────────── */
.tool-hero {
  padding: 52px 0 40px;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.tool-hero-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
}
.tool-hero-title {
  font-family: var(--mono);
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 700;
  letter-spacing: 2px;
  line-height: 1.1;
  color: var(--text);
}
.tool-hero-sub {
  font-size: 14px;
  color: var(--text-sec);
  max-width: 540px;
  line-height: 1.65;
}

/* ── Two-column control/output layout (used by cover-size, font-preview) ── */
.tool-body {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  align-items: start;
}
.tool-controls {
  border-right: 1px solid var(--border);
  padding: 32px 28px 32px 0;
  position: sticky;
  top: 52px;
  max-height: calc(100vh - 52px);
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
.tool-controls::-webkit-scrollbar { width: 4px; }
.tool-controls::-webkit-scrollbar-thumb { background: var(--border-strong); }
.tool-output {
  padding: 32px 0 32px 36px;
}

.control-section { margin-bottom: 28px; }
.control-section:last-child { margin-bottom: 0; }
.control-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1.8px;
  color: var(--text-faint);
  text-transform: uppercase;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.control-val { color: var(--accent); font-weight: 700; }

/* ── Buttons (copy / action — same component, two names in use) ── */
.copy-btn, .action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 1px;
  padding: 9px 16px;
  border: 1px solid var(--border-strong);
  background: var(--bg);
  color: var(--text-sec);
  cursor: pointer;
  border-radius: 2px;
  transition: all 0.12s;
}
.copy-btn:hover, .action-btn:hover { background: var(--surface); color: var(--text); border-color: var(--text-faint); }
.copy-btn.primary, .action-btn.primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.copy-btn.primary:hover, .action-btn.primary:hover { opacity: 0.88; }
.copy-btn.copied, .action-btn.copied { background: #d1fae5; color: #059669; border-color: #6ee7b7; }
.copy-btn svg, .action-btn svg { width: 13px; height: 13px; }

.copy-row, .action-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Toast ───────────────────────────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px; left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--text);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.8px;
  padding: 9px 18px;
  border-radius: 2px;
  opacity: 0;
  transition: all 0.2s;
  pointer-events: none;
  white-space: nowrap;
  z-index: 999;
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Loading / spinner (used by any tool that processes a file) ── */
.loading {
  display: flex; align-items: center; gap: 10px;
  padding: 32px; justify-content: center;
  color: var(--text-faint);
  font-family: var(--mono); font-size: 10px; letter-spacing: 1px;
}
.spinner {
  width: 16px; height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Section label (used above chapter lists, comparison tables, etc.) ── */
.section-label {
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 2px;
  color: var(--text-faint);
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 860px) {
  .tool-body { grid-template-columns: 1fr; }
  .tool-controls { border-right: none; border-bottom: 1px solid var(--border); padding: 28px 0; position: static; max-height: none; }
  .tool-output { padding: 28px 0; }
}
@media (max-width: 600px) {
  .tool-page { padding: 0 18px 60px; }
  .tool-hero { padding: 36px 0 28px; }
}