:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --info-color: #0dcaf0;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #212529;
}

body {
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.5rem;
}

.card {
    border: none;
    border-radius: 15px;
}

.card-header {
    border-radius: 15px 15px 0 0 !important;
    border-bottom: 1px solid #dee2e6;
}

.nav-tabs .nav-link {
    border: none;
    color: var(--secondary-color);
    font-weight: 500;
    padding: 1rem 1.5rem;
    border-radius: 10px 10px 0 0;
    margin-right: 0.5rem;
    transition: all 0.3s ease;
}

.nav-tabs .nav-link:hover {
    border: none;
    background-color: rgba(13, 110, 253, 0.1);
    color: var(--primary-color);
}

.nav-tabs .nav-link.active {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

.form-control, .form-select {
    border-radius: 10px;
    border: 1px solid #dee2e6;
    padding: 0.75rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.15);
}

.btn {
    border-radius: 10px;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #0d6efd, #0056b3);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3, #004085);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
}

.progress {
    height: 1rem;
    border-radius: 10px;
    background-color: #e9ecef;
}

.progress-bar {
    border-radius: 10px;
    background: linear-gradient(90deg, var(--primary-color), var(--info-color));
    transition: width 0.6s ease;
}

.modal-content {
    border-radius: 15px;
    border: none;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.modal-header {
    border-bottom: 1px solid #dee2e6;
    border-radius: 15px 15px 0 0;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.result-card {
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-left: 4px solid var(--primary-color);
    border-radius: 0 10px 10px 0;
}

.file-drop-zone {
    border: 2px dashed #dee2e6;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.file-drop-zone:hover {
    border-color: var(--primary-color);
    background-color: rgba(13, 110, 253, 0.05);
}

.file-drop-zone.dragover {
    border-color: var(--primary-color);
    background-color: rgba(13, 110, 253, 0.1);
    transform: scale(1.02);
}

.language-flag {
    width: 20px;
    height: 15px;
    margin-right: 8px;
    border-radius: 2px;
}

.status-badge {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
}

.status-completed {
    background-color: var(--success-color);
    color: white;
}

.status-processing {
    background-color: var(--warning-color);
    color: var(--dark-color);
}

.status-failed {
    background-color: var(--danger-color);
    color: white;
}

/* Login overlay */
.login-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0d6efd 0%, #4a148c 100%);
    backdrop-filter: blur(6px);
}

.login-card {
    width: 100%;
    max-width: 380px;
    margin: 1rem;
    padding: 2.5rem 2rem;
    background: #fff;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.5s ease-in;
}

.login-card .form-label {
    display: block;
    text-align: left;
    font-weight: 500;
}

.login-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: linear-gradient(135deg, #0d6efd, #6f42c1);
    color: #fff;
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}