/* Professional UI Enhancements */

/* Drop Zone Styling */
.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    background: var(--background-secondary);
    position: relative;
    overflow: hidden;
}

.drop-zone:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: 0;
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.02);
}

.drop-zone:hover:before {
    opacity: 0.03;
}

.drop-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(79, 70, 229, 0.05);
    transform: scale(1.01);
}

.drop-zone.dragover:before {
    opacity: 0.1;
}

.drop-zone-content {
    position: relative;
    z-index: 1;
}

.drop-zone-icon {
    color: var(--text-muted);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.drop-zone:hover .drop-zone-icon {
    color: var(--primary-color);
    transform: translateY(-4px);
}

.drop-zone-prompt {
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.5rem;
}

.drop-zone-hint {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Progress Steps - Professional Design */
.progress-steps {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.step {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
}

.step:not(:last-child):after {
    content: '→';
    position: absolute;
    right: -1.5rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.25rem;
}

.step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--border-color);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
    flex-shrink: 0;
}

.step.active {
    background: rgba(79, 70, 229, 0.05);
}

.step.active .step-number {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

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

.step.completed .step-number:before {
    content: '✓';
}

.step-content {
    flex: 1;
}

.step-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-color);
    margin-bottom: 0.25rem;
}

.step-description {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

.btn-icon {
    margin-right: 0.5rem;
}

/* Select Inputs - Professional Styling */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b7280' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.5rem;
}

body.dark-mode select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
}

/* Card Enhancements */
.card-body {
    padding: 0;
}

.intro-card {
    background: linear-gradient(135deg, var(--surface-color) 0%, var(--background-secondary) 100%);
    border: 1px solid var(--border-color);
}

.intro-card h2 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 0.5rem 0;
    line-height: 1.3;
}

.intro-card p {
    color: var(--text-muted);
    margin: 0;
    font-size: 1rem;
}

/* Scrollbar Styling */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Badge Styling */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.badge-primary {
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.badge-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
}

.loading:after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.6s linear infinite;
}

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

/* Skeleton Loader */
.skeleton {
    background: linear-gradient(90deg, var(--border-color) 25%, var(--border-light) 50%, var(--border-color) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Tooltip */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]:before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 0.5rem 0.75rem;
    background: var(--text-color);
    color: var(--surface-color);
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

[data-tooltip]:hover:before {
    opacity: 1;
    transform: translateX(-50%) translateY(-4px);
}

/* Focus States */
.form-control:focus-visible,
.btn:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Improved Transitions */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}