/* Duplicate Remover Section */
.duplicate-remover-section {
    margin-top: 2rem;
    margin-bottom: 3rem;
}

.remover-card {
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.remover-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

/* Input Panel */
.input-panel {
    padding: 2rem;
}

.input-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
}

.input-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    color: #1a1a1a;
}

.label-icon {
    font-size: 1.25rem;
}

.input-hint {
    font-size: 0.875rem;
    color: #6b7280;
}

.number-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    
    line-height: 1.6;
    resize: vertical;
    transition: all 0.2s ease;
    background: #fafafa;
    color: #1a1a1a;
}

.number-input:focus {
    outline: none;
    border-color: #3b82f6;
    background: #ffffff;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.number-input::placeholder {
    color: #9ca3af;
}

/* Options Grid */
.options-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-top: 1.5rem;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #374151;
}

.option-select {
    padding: 0.75rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 0.9375rem;
    background: #ffffff;
    color: #1a1a1a;
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-select:hover {
    border-color: #d1d5db;
}

.option-select:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.btn-process,
.btn-clear {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.btn-process {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: #ffffff;
}

.btn-process:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-process:active {
    transform: translateY(0);
}

.btn-clear {
    background: #f3f4f6;
    color: #374151;
    border: 2px solid #e5e7eb;
}

.btn-clear:hover {
    background: #e5e7eb;
    border-color: #d1d5db;
}

.btn-icon {
    font-size: 1.125rem;
}

/* Results Panel */
.results-panel {
    border-top: 2px solid #f3f4f6;
    padding: 2rem;
    background: linear-gradient(to bottom, #f9fafb 0%, #ffffff 100%);
    animation: slideDown 0.3s ease;
}

.results-panel.hidden {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin: 0;
}

.results-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-copy {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.625rem 1rem;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    background: #ffffff;
    color: #374151;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-copy:hover {
    background: #f9fafb;
    border-color: #3b82f6;
    color: #3b82f6;
}

/* Stats Container */
.stats-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-item {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.25rem;
    text-align: center;
    transition: all 0.2s ease;
}

.stat-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: #6b7280;
    font-weight: 500;
}

.stat-unique .stat-value {
    color: #10b981;
}

.stat-removed .stat-value {
    color: #ef4444;
}

.stat-efficiency .stat-value {
    color: #3b82f6;
}

/* Numbers Display */
.numbers-display {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.numbers-group {
    background: #ffffff;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.2s ease;
}

.numbers-group.hidden {
    display: none;
}

.numbers-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #f3f4f6;
}

.numbers-icon {
    font-size: 1.25rem;
}

.numbers-title {
    flex: 1;
    font-size: 1.125rem;
    font-weight: 600;
    color: #1a1a1a;
}

.numbers-count {
    background: #f3f4f6;
    color: #374151;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.875rem;
    font-weight: 600;
}

.numbers-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    min-height: 3rem;
}

.number-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.9375rem;
    font-weight: 500;
    animation: fadeIn 0.3s ease;
    transition: transform 0.2s ease;
}

.number-badge:hover {
    transform: scale(1.05);
}

.number-badge.unique {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: #ffffff;
}

.number-badge.duplicate {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: #ffffff;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .input-panel {
        padding: 1.5rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .results-panel {
        padding: 1.5rem;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .results-actions {
        width: 100%;
    }
    
    .btn-copy {
        flex: 1;
        justify-content: center;
    }
    
    .stats-container {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .input-panel {
        padding: 1rem;
    }
    
    .results-panel {
        padding: 1rem;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .number-input {
        font-size: 0.9375rem;
    }
}

/* Loading State */
.btn-process.processing {
    pointer-events: none;
    opacity: 0.7;
}

.btn-process.processing .btn-text::after {
    content: '...';
    animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
    0%, 20% {
        content: '.';
    }
    40% {
        content: '..';
    }
    60%, 100% {
        content: '...';
    }
}

/* Empty State */
.numbers-list:empty::before {
    content: 'No numbers to display';
    color: #9ca3af;
    font-style: italic;
    display: block;
    padding: 1rem;
    text-align: center;
}