.tool-page { padding-top: var(--space-6); padding-bottom: var(--space-12); }
.step-section { margin-top: var(--space-6); padding-top: var(--space-6); border-top: 1px solid var(--color-border); }
.step-section:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
.step-header { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-3); }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 32px; height: 32px; background: var(--gradient-primary); color: #fff; border-radius: 50%; font-weight: 700; font-size: 0.85rem; flex-shrink: 0; }
.step-header h3 { font-size: 1.05rem; font-weight: 600; color: var(--color-text-primary); }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
textarea { width: 100%; padding: var(--space-4); border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-bg-secondary); color: var(--color-text-primary); font-size: 0.95rem; font-family: var(--font-sans); resize: vertical; min-height: 120px; transition: border-color var(--transition-fast); }
textarea:focus { outline: none; border-color: var(--color-accent-blue); box-shadow: 0 0 0 3px rgba(59,130,246,0.1); }
textarea::placeholder { color: var(--color-text-muted); }
.file-upload-mini { margin-top: var(--space-2); }

/* Tabs */
.tab-bar { display: flex; gap: var(--space-2); border-bottom: 1px solid var(--color-border); padding-bottom: var(--space-2); margin-bottom: var(--space-4); }
.tab-btn { padding: 0.5rem 1.2rem; background: none; border: none; border-radius: var(--radius-full); cursor: pointer; font-weight: 500; color: var(--color-text-secondary); transition: all var(--transition-fast); font-size: 0.9rem; }
.tab-btn:hover { color: var(--color-text-primary); background: var(--color-bg-secondary); }
.tab-btn.active { background: var(--gradient-primary); color: #fff; }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeInUp 0.3s ease; }

/* Preview */
.preview-container { background: var(--color-bg-secondary); border-radius: var(--radius-lg); border: 1px solid var(--color-border); overflow: hidden; margin-top: var(--space-4); }
.preview-header { display: flex; justify-content: space-between; align-items: center; padding: var(--space-3) var(--space-4); background: var(--color-surface-elevated); border-bottom: 1px solid var(--color-border); }
.preview-label { font-weight: 600; font-size: 0.85rem; color: var(--color-text-secondary); }
.preview-stats { font-size: 0.8rem; color: var(--color-text-muted); }
.preview-content { padding: var(--space-4); max-height: 400px; overflow-y: auto; font-family: var(--font-mono); font-size: 0.85rem; white-space: pre-wrap; word-break: break-word; color: var(--color-text-secondary); line-height: 1.8; }
.preview-content .subtitle-line { display: block; padding: var(--space-1) var(--space-2); border-radius: var(--radius-sm); transition: background var(--transition-fast); }
.preview-content .subtitle-line:hover { background: rgba(59,130,246,0.05); }
.preview-content .subtitle-line .timecode { color: var(--color-accent-cyan); font-weight: 500; margin-right: var(--space-2); }
.preview-content .subtitle-line .text { color: var(--color-text-primary); }
.actions { margin-top: var(--space-4); display: flex; flex-wrap: wrap; gap: var(--space-2); }

#translationResult, #transcriptionResult { animation: fadeInUp 0.3s ease; }

@media (max-width: 768px) {
    .settings-grid { grid-template-columns: 1fr; }
    .tab-bar { flex-wrap: wrap; }
    .tab-btn { flex: 1; text-align: center; padding: 0.4rem 0.8rem; font-size: 0.8rem; }
    .preview-content { max-height: 250px; font-size: 0.8rem; }
}