/* --- Overrides --- */
.csv-main { margin-top: 25px !important; padding-top: 10px !important; }
.header { margin-bottom: 24px !important; }
.top-nav { margin-bottom: 16px; }

.back-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--card); border: 1px solid var(--border);
  color: var(--text); padding: 6px 14px; border-radius: 8px;
  text-decoration: none; font-size: 0.85rem; font-weight: 600;
  transition: all 0.2s ease; box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }

/* --- Mobile Header Fix --- */
@media (max-width: 600px) {
  .header { flex-direction: column !important; align-items: flex-start !important; gap: 16px; }
  .theme-toggle { position: static !important; }
}

/* --- Converter Layout --- */
.converter-layout {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}

@media (min-width: 800px) {
  .converter-layout {
    flex-direction: row;
    align-items: stretch;
  }
}

/* --- Panels --- */
.io-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.02);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(128,128,128,0.03);
}

.panel-header label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.text-btn {
  background: transparent; border: none; cursor: pointer;
  font-size: 0.85rem; font-weight: 600; color: var(--muted);
  padding: 4px 8px; border-radius: 4px; transition: all 0.2s ease;
}
.text-btn:hover { background: var(--border); color: var(--text); }
.accent-text { color: var(--accent); }
.accent-text:hover { background: rgba(234, 88, 12, 0.1); color: var(--accent); }
[data-theme="dark"] .accent-text:hover { background: rgba(34, 211, 238, 0.1); }

/* --- Text Areas (Code Editor Style) --- */
.code-area {
  flex: 1;
  min-height: 250px;
  border: none;
  background: transparent;
  color: var(--text);
  padding: 16px;
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  resize: vertical;
  outline: none;
}
.code-area::placeholder { color: var(--muted); opacity: 0.5; }

/* --- Center Controls --- */
.controls-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px 0;
}

.primary-btn {
  background: var(--accent); color: var(--accent-contrast);
  border: none; padding: 12px 24px; border-radius: 8px;
  font-size: 1rem; font-weight: 600; cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1); transition: all 0.2s ease;
  white-space: nowrap;
}
.primary-btn:hover { transform: translateY(-2px); filter: brightness(1.1); }

.options-group {
  display: flex; flex-direction: column; gap: 8px;
}

.checkbox-label {
  display: flex; align-items: center; gap: 8px;
  font-size: 0.85rem; color: var(--muted); cursor: pointer;
}
/* --- Header Actions --- */
.header-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}