body { font-family: 'Inter', sans-serif; }
.font-poppins { font-family: 'Poppins', sans-serif; }
.font-mono { font-family: 'Roboto Mono', monospace; }

/* Navigation Tabs */
.main-tab-btn {
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}
.main-tab-btn.active {
    border-bottom-color: #3b82f6; /* Blue-500 */
    color: #60a5fa; /* Blue-400 */
    background-color: #1f2937; /* Gray-800 */
}

/* Audio Tool Specifics */
.audio-sub-tab-btn {
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}
.audio-sub-tab-btn.active {
    border-bottom-color: #a78bfa; /* Violet-400 */
    color: #c4b5fd; /* Violet-300 */
    background-color: #374151; /* Gray-700 */
}

.drag-over { border-color: #3b82f6 !important; }
.group-container, .file-item { user-select: none; }
.dragging { opacity: 0.5; }
[contenteditable]:focus { outline: 2px solid #3b82f6; background-color: #4b5563; border-radius: 4px; }

/* NRT Specifics */
.nrt-upload-area {
    border: 2px dashed #4b5563;
    border-radius: 12px;
    padding: 2.5em;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #111827;
}
.nrt-upload-area:hover, .nrt-upload-area.dragover {
    border-color: #a78bfa;
    background-color: #1f2937;
}
.nrt-dialogue-group {
    border: 1px solid #374151;
    border-radius: 12px;
    margin-bottom: 2em;
    background-color: #1f2937;
    overflow: hidden;
}
.nrt-dialogue-header {
    padding: 1.5em;
    background-color: #111827;
    border-bottom: 1px solid #374151;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.nrt-btn-sm {
    padding: 0.5em 1em;
    border-radius: 8px;
    font-size: 0.85em;
    font-weight: 500;
    background-color: #374151;
    border: 1px solid #4b5563;
    color: #e5e7eb;
    cursor: pointer;
    margin-left: 5px;
}
.nrt-btn-sm:hover {
    background-color: #4b5563;
    border-color: #60a5fa;
    color: white;
}
.nrt-file-list li {
    padding: 1em 1.5em;
    border-bottom: 1px solid #374151;
    display: flex;
    align-items: center;
    gap: 15px;
    background: #1f2937;
    color: #e5e7eb;
}
.nrt-file-list li:hover { background-color: #374151; }
.nrt-timestamp-pill {
    background-color: #111827;
    color: #9ca3af;
    padding: 2px 8px;
    border: 1px solid #374151;
    border-radius: 4px;
    font-family: monospace;
    font-size: 0.85em;
    min-width: 100px;
    text-align: center;
}
.normalization-badge {
    background-color: #1e3a8a;
    color: #93c5fd;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8em;
    margin-right: 5px;
}

/* Generic Input Styles */
.tool-textarea {
    width: 100%;
    background-color: #111827; /* gray-900 */
    border: 2px solid #374151; /* gray-700 */
    border-radius: 0.5rem;
    padding: 1rem;
    color: #d1d5db; /* gray-300 */
    font-family: 'Roboto Mono', monospace;
    transition: all 0.2s;
}
.tool-textarea:focus {
    outline: none;
    border-color: #6366f1; /* indigo-500 */
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}