/* Site-specific styles for base64-encoder. Shared chrome (vars, base reset,
 * .btn, .topbar, .status colors, .footer) lives in /_chrome.css. */

main {
  padding: 12px;
  max-width: 1200px;
  margin: 0 auto;
}

/* ── Tabs ──────────────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0;
}

.tab-btn {
  padding: 8px 20px;
  background: transparent;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  color: var(--fg-mute);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 14px;
  margin-bottom: -1px;
  transition: color 0.1s;
}

.tab-btn:hover {
  color: var(--fg);
}

.tab-btn.active {
  background: var(--bg-pane);
  border-color: var(--border);
  border-bottom-color: var(--bg-pane);
  color: var(--fg);
}

/* ── Toolbar ───────────────────────────────────────────────────────────── */
.toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 10px 0;
  margin-bottom: 10px;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.toolbar-group label {
  font-size: 13px;
  color: var(--fg-mute);
}

.toolbar-group select {
  font-family: var(--sans);
  font-size: 13px;
  padding: 5px 8px;
  background: var(--bg-elev);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.check-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--fg-mute);
  cursor: pointer;
}

.actions {
  margin-left: auto;
  gap: 6px;
}

/* ── Split pane layout ─────────────────────────────────────────────────── */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  height: calc(100vh - 280px);
  min-height: 300px;
}

@media (max-width: 700px) {
  .split {
    grid-template-columns: 1fr;
    height: auto;
  }
}

.pane {
  display: flex;
  flex-direction: column;
  background: var(--bg-pane);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  min-height: 220px;
}

.pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 6px;
}

.pane-title {
  font-size: 11px;
  color: var(--fg-mute);
  text-transform: uppercase;
  letter-spacing: 0.7px;
}

.pane-actions {
  display: flex;
  gap: 6px;
}

.pane textarea {
  flex: 1;
  padding: 12px 14px;
  margin: 0;
  border: 0;
  background: transparent;
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
  resize: none;
  overflow: auto;
  outline: none;
}

.pane textarea::placeholder {
  color: var(--fg-mute);
}

.status {
  padding: 8px 12px;
  border-top: 1px solid var(--border);
  font-size: 13px;
}

/* ── Drop zone (Image tab) ─────────────────────────────────────────────── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 36px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  user-select: none;
  margin-bottom: 12px;
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 6%, transparent);
}

.drop-hint {
  font-size: 16px;
  color: var(--fg);
  margin: 0 0 6px;
}

.drop-link {
  color: var(--accent);
  text-decoration: underline;
  cursor: pointer;
}

.drop-sub {
  font-size: 13px;
  color: var(--fg-mute);
  margin: 0;
}

/* ── Image preview ─────────────────────────────────────────────────────── */
.img-preview-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 10px;
}

#img-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  border: 1px solid var(--border);
  object-fit: contain;
  background: var(--bg-pane);
}

.img-meta {
  font-size: 12px;
  color: var(--fg-mute);
  font-family: var(--mono);
  text-align: center;
  margin: 0 0 10px;
}

.img-output-pane {
  min-height: 140px;
  max-height: 260px;
}