body {
    font-family: 'Inter', sans-serif;
}
/* --- Styles from Verifier App --- */
.custom-file-upload {
    border: 2px dashed #cbd5e1;
    display: inline-block;
    padding: 1rem 1.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.custom-file-upload:hover, .dragover {
    border-color: #4f46e5;
    background-color: #f8fafc;
}
input[type="file"] {
    display: none;
}
.spinner {
    border: 4px solid rgba(0, 0, 0, 0.1);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border-left-color: #4f46e5;
    animation: spin 1s ease infinite;
}
/* @keyframes spin { ... } is defined below, no need to duplicate */
/* --- Styles from Merger App (Adapted for Light Mode) --- */
#mergerTab textarea::-webkit-scrollbar,
#mergerTab div::-webkit-scrollbar {
    width: 8px;
}
#mergerTab textarea::-webkit-scrollbar-track,
#mergerTab div::-webkit-scrollbar-track {
    background: #e2e8f0; /* slate-200 */
}
#mergerTab textarea::-webkit-scrollbar-thumb,
#mergerTab div::-webkit-scrollbar-thumb {
    background: #94a3b8; /* slate-400 */
    border-radius: 4px;
}
#mergerTab textarea::-webkit-scrollbar-thumb:hover,
#mergerTab div::-webkit-scrollbar-thumb:hover {
    background: #64748b; /* slate-500 */
}
/* Style for file input button in Merger */
.merger-file-upload-label {
    cursor: pointer;
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: #475569; /* slate-600 */
    color: white;
    border-radius: 0.375rem; /* rounded-md */
    transition: background-color 0.2s;
    border: 1px solid #64748b; /* slate-500 */
    text-align: center;
}
.merger-file-upload-label:hover {
    background-color: #64748b; /* slate-500 */
}
.merger-file-name {
    margin-left: 1rem;
    font-style: italic;
    color: #475569; /* slate-600 */
}
/* --- Tab Button Styles --- */
.tab-btn {
    padding: 0.75rem 1.5rem;
    font-weight: 600; /* was font-medium */
    color: #475569; /* slate-600 */
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    cursor: pointer;
}
.tab-btn.active {
    color: #4f46e5; /* indigo-600 */
    border-bottom-color: #4f46e5;
}
.tab-btn:hover:not(.active) {
    color: #334155; /* slate-700 */
    background-color: #f1f5f9; /* slate-100 */
}
/* --- Styles from Translator App --- */
/* Custom styles for a simple spinner */
.loader {
    border-top-color: #4f46e5; /* Changed from blue to indigo */
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}