html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Custom gradient background */
.bg-gradient-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* Upload area styling */
.upload-area {
    border: 2px dashed #dee2e6;
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    transition: all 0.3s ease;
    background-color: #f8f9fa;
    cursor: pointer;
}

.upload-area:hover {
    border-color: #667eea;
    background-color: #f0f2ff;
}

.upload-area.drag-over {
    border-color: #667eea;
    background-color: #e8ecff;
    transform: scale(1.02);
}

.upload-content {
    pointer-events: none;
}

.upload-area:hover .upload-content {
    pointer-events: auto;
}

/* Feature icons */
.feature-icon {
    opacity: 0.8;
    transition: all 0.3s ease;
}

.feature-icon:hover {
    opacity: 1;
    transform: translateY(-5px);
}

/* Card styling */
.card {
    border-radius: 16px;
    overflow: hidden;
}

.card-body {
    border-radius: 16px;
}

/* Button styling */
.btn {
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border: none;
}

/* Progress bar styling */
.progress {
    border-radius: 10px;
    background-color: #e9ecef;
}

.progress-bar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
}

/* Alert styling */
.alert {
    border-radius: 12px;
    border: none;
}

.alert-info {
    background-color: #e8f4fd;
    color: #0c5460;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .display-4 {
        font-size: 2.5rem;
    }
    
    .card-body {
        padding: 2rem 1.5rem;
    }
}

/* Animation for file upload */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#fileInfo {
    animation: fadeIn 0.3s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}