/**
 * Button Component CSS
 */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 120px;
}

.btn:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Button Variants */
.btn-primary {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: #f7fafc;
    color: #4a5568;
    border: 2px solid #e2e8f0;
}

.btn-secondary:hover {
    background: #edf2f7;
    border-color: #cbd5e0;
}

.btn-success {
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(72, 187, 120, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #f56565, #e53e3e);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(245, 101, 101, 0.4);
}

.btn-warning {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
    color: white;
}

.btn-warning:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(237, 137, 54, 0.4);
}

/* Button Sizes */
.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    min-width: auto;
}

.btn-xs {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    min-width: auto;
}

/* Button States */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn:disabled:hover {
    transform: none;
    box-shadow: none;
}

/* Loading State */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 16px;
    height: 16px;
    border: 2px solid transparent;
    border-top: 2px solid currentColor;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Block Button */
.btn-block {
    width: 100%;
    justify-content: center;
}

/* Icon Buttons */
.btn-icon {
    padding: 0.75rem;
    min-width: auto;
    border-radius: 50%;
}

.btn-icon.btn-small {
    padding: 0.5rem;
}

.btn-icon.btn-large {
    padding: 1rem;
}

/* Responsive Button Enhancements */
@media (max-width: 1024px) {
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .btn-large {
        padding: 0.875rem 1.75rem;
        font-size: 1.1rem;
    }
}

@media (max-width: 768px) {
    .btn {
        min-height: 48px;
        padding: 0.875rem 1.5rem;
        font-size: 1rem;
        border-radius: 12px;
    }
    
    .btn-large {
        min-height: 52px;
        padding: 1rem 2rem;
        font-size: 1.125rem;
    }
    
    .btn-small {
        min-height: 44px;
        padding: 0.75rem 1.25rem;
        font-size: 0.9rem;
    }
    
    .btn-icon {
        min-height: 48px;
        min-width: 48px;
        padding: 0.75rem;
    }
    
    .btn-icon.btn-small {
        min-height: 44px;
        min-width: 44px;
        padding: 0.625rem;
    }
    
    /* Enhanced touch feedback */
    .btn:active {
        transform: translateY(1px) scale(0.98);
    }
    
    .btn:hover {
        transform: translateY(-1px);
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 1rem 1.5rem;
        font-size: 1rem;
        border-radius: 14px;
        min-height: 48px;
    }
    
    .btn-large {
        padding: 1.125rem 2rem;
        font-size: 1.125rem;
        min-height: 54px;
    }
    
    .btn-small {
        padding: 0.875rem 1.25rem;
        font-size: 0.9rem;
        min-height: 44px;
    }
    
    .btn-block {
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
    }
    
    /* Reduced motion on small screens for battery life */
    @media (prefers-reduced-motion: reduce) {
        .btn:hover, .btn:active {
            transform: none;
        }
    }
}